- No category
OMM/OMT Board Review Notes: Osteopathic Manipulative Medicine Study Guide
advertisement
OMM / OMT Comprehensive Board Review Notes OSTEOPATHIC MANIPULATIVE MEDICINE · EXAM-READY STUDY GUIDE Compiled from bonewizardry.com/omm September 2026 All ~39 interactive topic pages of the site, condensed into 34 sections across 8 parts. A small number of sections draw on pages that are partially gated behind the site's Elite subscription; those are flagged inline where they occur. Table of Contents PART 1 — FOUNDATIONS 6 OMM Fundamentals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Fryette's Principles (Full Detail) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Cervical Spine OMM 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Lumbar Dysfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Thoracic Type II Somatic Dysfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Rib Mechanics (Pump/Bucket/Caliper) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Rib 3-5 Inhalation Dysfunction & Muscle Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Scoliosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Zink's Common Compensatory Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 PART 3 — PELVIS & SACRUM 53 Sacral Diagnosis (Sacral Dysfunctions / Torsions) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Innominate Rotations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Innominate Shears & Flares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Posterior Innominate Rotation & Hamstring Dysfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Pregnancy Biomechanics & Lumbar Lordosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 75 Counterstrain: Pelvis & Lumbar Tender Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Psoas Syndrome & the Opposite-Motion Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Psoas Syndrome & Iliopsoas Dysfunction (Red Flags/MET Detail) Piriformis Syndrome . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Soft Tissue Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Myofascial Release & the Muscle Stretch Reflex Fascial Subtypes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Viscerosomatic Reflexes & Chapman Points Autonomic Spinal Levels 107 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 Colonic Parasympathetic Viscerosomatic Reflexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 Lymphatic OMT: Pumps & Pathway Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY 127 Cranial PSNS Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 Cranial Strain Patterns (SBS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Cranial Dysfunctions (PRM, Five Strains, Deep Anatomy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 PART 7 — EXTREMITIES & PERIPHERAL NERVES Fibular Head Dysfunctions 155 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 Radial Head Dysfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 Upper & Lower Extremity + ANS/Chapman Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Lower Extremity Nerve Injuries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 Brachial Plexus & Upper Extremity Nerve Injuries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN 185 Osteopathic Special Tests (Provocative Exam Maneuvers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 Low Back Pain: Red Flags & OMT Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 3 OMM / OMT BOARD REVIEW A Note on Coverage This document covers all ~39 topic pages of the site (several URLs redirect to the same underlying page — e.g. sacral-dysfunctions, sacral-innominate-treatment, sacral-diagnosis, and sacral-torsions all serve one shared “Sacral Diagnosis” page, consolidated into one section here). A subset of pages are gated behind the site's “Elite” subscription ($9.99/month). For those pages, this document captures everything available in the free preview — which in several cases was substantial (a full page of content, or most quiz vignettes) and in a few cases was more limited (e.g., fascial-subtypes only exposed 1 of 18 quiz vignettes; lymphatics and sacral-dysfunctions had partial quiz banks locked). Each affected section is flagged inline noting exactly what was and wasn't accessible. No paywall was bypassed — only publicly visible free-tier content was captured. Legend — how callouts are used throughout this guide: Red = board traps, critical distinctions, and high-risk decision rules. Blue = quiz / vignette highlights. Green = memory hooks. Purple = true/false boundary statements. Navy = other named lists and classification frameworks. 4 OMM / OMT BOARD REVIEW 5 PART 1 — FOUNDATIONS PART 1 FOUNDATIONS IN THIS PART OMM Fundamentals Fryette's Principles (Full Detail) 6 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS OMM Fundamentals OMM · FOUNDATIONS OMM Fundamentals The building block for everything else. Core Tenets, TART, Acute vs Chronic, barriers, Fryette's Laws. Skip this and the rest of OMM is a blur. ★ Classic Board Stem A 34-year-old pitcher presents with right shoulder pain that has gradually worsened over two years. On exam, the affected area feels cool, ropey, and fibrotic. He reports dull, achy discomfort but no pain with range of motion. An asymmetry in shoulder height is present but appears compensated. Which of the following best characterizes his somatic dysfunction? A. Acute somatic dysfunction with venous congestion B. Chronic somatic dysfunction with neovascularization C. Acute somatic dysfunction with increased skin drag D. Chronic somatic dysfunction with uncompensated asymmetry ✓ Correct. Clue chain: two years of symptoms → body had time to adapt → asymmetry is compensated. Tissue feels cool, ropey, fibrotic (not hot and boggy) → dull ache, not sharp → no pain with ROM. Vascular payoff: chronic SD builds neovascularization (new vessels over time). Acute SD instead shows venous congestion from fresh inflammation. Same shoulder hurt yesterday would be hot, boggy, sharp, uncompensated, and painful with motion. The Blueprint Four Core Tenets that define osteopathic medicine, plus the exam findings that prove a patient has somatic dysfunction. Vertebral Column · tap to expand These four tenets are the philosophical foundation of every OMM question. If the answer involves treating the whole patient, self-regulation, or structure-function, you're hearing these tenets applied. TENET I Body is a Unit Structure, mind, and spirit as one Treating one part affects the whole Why This Matters The body isn't a bag of separate parts. Treating T4 can affect cardiac function via sympathetics. A visceral problem can show up as back pain. in clinical practice, this is why OMT is justified even when the chief complaint seems unrelated to the spine. 7 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Viscerosomatic reflexes → somatic findings → OMT addresses the root → organ improves TENET II Self-Healing & Self-Regulation Inherent capacity to heal and maintain homeostasis ⚡ The body wants to fix itself The Physician's Job The DO doesn't heal the patient. The DO removes the obstacle so the body can heal itself. Somatic dysfunction is the obstacle. OMT is the removal. This tenet justifies a hands-on exam for patients with systemic illness. SD blocks self-regulation → OMT removes SD → body heals → homeostasis restored TENET III Structure-Function Interrelated Anatomy dictates physiology and vice versa Bad structure = bad function The Core Principle This is why the structural exam matters. A compressed vertebra doesn't just hurt. It disrupts the nerves passing through it, the muscles it anchors, and the organs those nerves supply. Structure IS function. Function IS structure. They're the same thing. Misaligned vertebra → nerve compression → organ dysfunction → disease TENET IV Rational Treatment Treatment based on understanding the first three tenets ⚙ Tenets 1-3 inform all OMT decisions Why It's Tenet Four Treatment must be rational, meaning based on understanding the first three tenets. You choose OMT because the body is a unit (I), it can self-heal (II), and structure affects function (III). Treatment without understanding these is just guessing. This tenet is the application of the other three. Understand tenets 1-3 → apply rationally → treat the cause → not just symptoms TART Criteria The four signs you use to IDENTIFY somatic dysfunction. Any ONE of these is enough. 8 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Tissue texture changes · Asymmetry · Restricted range of motion · Tenderness Now use it. Which step in the Osteopathic Structural Exam uncovers each TART finding? Step 1 of the Structural Exam: you just look at the patient. What are you looking for? Functional or postural asymmetries (head forward, scapular imbalance) Tissue temperature and skin drag differences Pain at the restrictive barrier Visual inspection catches asymmetry (TART: A). You can see a raised shoulder, forward head posture, pelvic tilt. You can't feel temperature by looking, and you can't test motion just by looking. That's step 2 (touch) or step 4 (motion). Step 1 is purely visual. Eyes only. ✓ Step 1: LOOK → catches Asymmetry. Step 2: TOUCH → catches Tissue Texture + Tenderness. Step 4: MOTION → catches Restricted ROM. The skin drag test and red reflex are "special tests." What are they for? Hint: they're not your main diagnostic tools. Determining whether somatic dysfunction is acute vs. chronic Identifying the direction of restricted motion Confirming all four TART criteria are present Exactly. Skin drag test and red reflex tell you ACUTE vs CHRONIC, not which TART criteria are present. for clinical practice, you don't need deep detail on these tests, just know what they're for. Restricted motion = motion testing (step 4). These special tests are about timing: is this SD fresh or long-standing? ✓ Structural Exam summary: Look → Touch → Special Tests (acute vs chronic) → Motion Testing (barriers) Hot vs Cold Acute and chronic somatic dysfunction look completely different. The board question tells you which one via the clinical description. Your job: read the clues. Spinal Column · lateral view · tap to expand This entire comparison is extremely high-yield. Memorize every row. A single mismatched descriptor in a vignette tells you which type you're dealing with. ACUTE 9 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS ❄ CHRONIC TissueHot · Boggy · Edematous TendernessSharp pain AsymmetryUncompensated (body hasn't adapted yet) Range of MotionPain with ROM Skin DragIncreased drag VascularVenous congestion (acute inflammation) TissueCool · Ropey · Fibrotic TendernessDull ache AsymmetryCompensated (body learned to adapt) Range of MotionNo pain with ROM Skin DragDecreased drag VascularNeovascularization (new vessels formed) The pitcher analogy: hurt your shoulder yesterday → hot, boggy, sharp, uncompensated. Same shoulder two years later → cool, ropey, dull, compensated, no pain with motion. Same structure, completely different story. Now eliminate. Which somatic dysfunction am I describing? Two patients walked in. I'll give you clues. Tap the one who gets eliminated by each clue. Last one standing is the right answer. Acute SD Fresh injury, hot & boggy ❄ Chronic SD Long-standing, cool & fibrotic The patient describes the pain as dull and achy. Acute Memory Hook HEAT: Hot tissue, Edematous, Acute = uncompensated & sharp pain, Tissue congestion (venous) ❄ Chronic Memory Hook COOL: Cool & ropey, Old injury = compensated, Old vessels (neo), Less drag + dull pain 10 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Vascular Logic Hook Acute = fire, veins get CONGESTED with the firefighters. Chronic = abandoned building, body builds NEW roads (neovascularization) to route around the damage. The Motion Stack Three barriers define how far any joint can move. Only one of them is the problem in somatic dysfunction. Know the difference cold. Spinal Curvature · normal architecture · tap to expand Shoulder Abduction Barrier Model Tap each barrier to see where it falls and what happens if you go beyond it. Physiologic Anatomic Restrictive Select a barrier above to see where it sits in the range of shoulder abduction and what it means clinically. Rotation Barriers · Top-Down Toggle SD on. One arc collapses. That short red arc is the restrictive barrier. Normal SD · Rotated R SP points straight posterior. Both TPs symmetric. Rotation is equal both directions (green arcs). No restrictive barrier. Active vs Passive Motion These definitions show up in question stems and answer choices. Know the difference instantly. TypeWho moves itBarrier it reaches ActivePatient alonePhysiologic barrier PassivePhysician assistsAnatomic barrier Active = Alone (patient). Passive = Physician assists. Two letters, two seconds, never miss it again. ⚠ Board Trap: The restrictive barrier is NOT the physiologic barrier. When a patient has somatic dysfunction, their active motion hits the restrictive barrier FIRST, which is less than the normal physiologic barrier. The physiologic barrier is what they should be able to achieve. 11 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS The restrictive barrier is what they can achieve with the SD present. Three Barriers in Order PAR: Physiologic (active, normal) → Anatomic (passive, hard stop) → Restrictive (SD present, less than physiologic). Remember PAR = the normal baseline. SD makes you below par. Anatomic Barrier = Bone Beyond anatomic barrier → tissue damage (fracture/dislocation). Think of it as the bony wall you'd crash through. You can't push past anatomy without breaking something. Restrictive Barrier = The Problem This is the ONLY barrier OMT cares about. OMT pushes toward or through the restrictive barrier to restore normal motion. Physiologic and anatomic barriers are just reference points. Restrictive is the target. Name It & Treat It Fryette's Laws tell you whether side-bending and rotation go the same or opposite direction. Once you know that, you can name any spinal somatic dysfunction and pick direct vs indirect treatment. Vertebral Column · classic anatomy 1909 · tap to expand Fryette's Laws apply ONLY to thoracic and lumbar spine. Not cervical. Not sacrum. Thoracic + lumbar only. This is extremely high yield. Law I Law II Law III Neutral Group → Opposite Directions When a group of segments is neutral (not flexed, not extended), sidebending and rotation occur in opposite directions. Example: T3-T6 N SR RL = Neutral, sidebent Right, rotated Left. Opposite = Type I = Group of segments. Memory: Neutral → Not the same direction = Opposite. "No-same-outs." Flexed/Extended Single Pair → Same Direction When a single pair of segments is flexed or extended, sidebending and rotation occur in the same direction. Example: T6 F SL RL = Flexed, sidebent Left, rotated Left. Same = Type II = Single pair, Flexed or Extended. 12 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Memory: Flexed/Extended → everything goes the Same. "FES = Same." Motion in One Plane Reduces Motion in Others When a spine moves in one plane (e.g., extension), motion in other planes (e.g., sidebending) is decreased. Example: Extension decreases how far the spine can sidebend. Flex it forward, and sidebend opens up again. Lower yield than Laws I and II, but still tested. Usually in the context of why certain OMT positions work. Fryette's Laws Visualized Toggle. Watch the rotation arrow flip while the sidebend stays the same. Law I · Neutral Law II · F/E Law I · Neutral GROUP. Sidebend and rotation go OPPOSITE directions. Sidebend left, rotate right. Classic: T3-T6 N SL RR. Name the Dysfunction Work through the logic. Same steps every time. A vertebra's right transverse process is more posterior than the left. What does this tell you about rotation? Imagine the vertebra as a spinning top. Which way is it turned? Rotated right (posterior TP = toward you when prone = rotated that direction) Rotated left Cannot determine rotation from transverse process position Right. When a vertebra rotates right, the right TP swings posteriorly and becomes more superficial (you'd feel it more easily on a prone patient). Left TP goes anterior and deeper. Posterior TP = rotation toward that side. Always. Posterior TP = that side is rotating toward you. Think of the vertebra spinning: if it rotates right, the right TP sweeps backward (posterior). The left TP goes forward (anterior). ✓ Right posterior TP → rotated RIGHT. Left posterior TP → rotated LEFT. The asymmetry resolves when you put the patient in a sphinx (extended) position. What is the ease? Somatic dysfunctions are named for the position they PREFER (the ease). Extended (asymmetry resolves in extension = segment prefers extension) 13 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Flexed (sphinx is a neutral position) Neutral (the asymmetry only partly resolves) Exactly. When the asymmetry resolves in a position, that position IS the ease. Sphinx = extended. The segment prefers extension. That makes it an EXTENDED dysfunction. Sphinx position = extended. When the asymmetry resolves in extension, the vertebra prefers extension. We name it extended. ✓ Ease = Extension + Right Rotation. Now apply Fryette Law II (single segment, flexed or extended → same direction). Single vertebra, extended, rotated right. By Fryette's Law II, what direction does it sidebend? Sidebent RIGHT (single pair, flexed/extended → same direction as rotation) Sidebent LEFT (opposite direction) Cannot determine without imaging Law II: single pair + flexed or extended = sidebend and rotation in the SAME direction. Rotated right → sidebent right. Full name: T6 Extended, Rotated Right, Sidebent Right (T6 ERSR). Law II is for single segments that are flexed or extended. Same direction. Rotated right = sidebent right. Law I (opposite) only applies to neutral GROUPS. ✓ T6 Extended Rotated Right Sidebent Right. You just named a somatic dysfunction. That's the whole process. Direct vs Indirect Treatment Flip the cards. One goes toward the problem. One goes away from it. DIRECT Toward the Bind Directed into restriction → Away from ease Direct Example T2 Extended SL RL. Ease = Extended SL RL. Bind = Flexed SR RR. Direct technique: position the patient into Flexion + Sidebent Right + Rotated Right. Ease → opposite = Bind → Direct goes there INDIRECT ὠ Toward the Ease 14 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Exaggerates preferred position → Away from bind Indirect Example Same T2 Extended SL RL. Indirect technique: exaggerate the ease → position into Extension + Sidebent Left + Rotated Left. Let the tissue release from the comfortable side. Ease → go further into ease → Indirect goes there Direct → Don't let it be comfortable. Go into the restriction. Indirect → It gets what it wants. Go into the ease. The Toolkit Facet orientation governs what each region can do. Muscle contractions define how OMT works. Treatment classification tells you what bucket every technique lives in. Know these and you stop memorizing; you start predicting. Facet Orientation by Region Every technique is exploiting facet geometry. Three regions, three orientations. The mnemonic: BUM, BUL, BUM. Thoracic is the odd one out. Cervical Thoracic Lumbar Cervical: BUM Facets oriented Backward, Upward, Medial. This geometry allows a lot of rotation but limits pure flexion/extension. BUM = Backward Upward Medial. Cervical spine lets you look over your shoulder because of this orientation. Both Cervical and Lumbar = BUM. Thoracic = BUL. If you only remember one exception: Thoracic is Lateral. Thoracic: BUL Facets oriented Backward, Upward, Lateral. The Lateral orientation is what makes thoracic different from both cervical and lumbar. BUL = the one exception. Lateral instead of Medial. This favors rotation in the thoracic spine. Think: thoracic is the most rotatable region of the spine. 15 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Board trap: thoracic facets favor rotation because they are lateral. Lumbar facets LOCK rotation because they are medial. Opposite effects from a one-letter change. Lumbar: BUM Facets oriented Backward, Upward, Medial. Same letters as cervical but completely different mechanical result: medial facets lock rotation in the lumbar spine. Lumbar BUM locks rotation. This is why you don't get much rotation in the lower back. The medial orientation mechanically blocks it. ⚠ Board Trap: Cervical and Lumbar both = BUM, but they don't behave the same. In the cervical spine, BUM allows rotation due to overall geometry. In the lumbar spine, BUM locks it. Same mnemonic, opposite result. Context matters. Muscle Contractions: How OMT Actually Works Every OMT technique uses one of these contraction types. Flip the cards. Know which technique uses which. ISOMETRIC ⚖ Equal Force Patient = Operator force No movement occurs MET Technique Muscle Energy Technique uses isometric contractions. Patient pushes against operator's resistance with equal force. No movement, and the effort fatigues the muscle, releasing the SD after relaxation. Patient force = Operator → no motion → post-isometric relaxation → barrier releases ISOLYTIC Operator Overpowers Operator > Patient force Controlled lengthening Breaks Fibrosis Operator overpowers the patient's contraction, forcibly lengthening the muscle. Used to break up fibrotic/chronic tissue. The patient is trying to resist but the operator wins. More aggressive than MET. Operator force > Patient → forced lengthening → fibrosis disrupted 16 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS ISOTONIC Same Tension Movement happens Constant force, changing length Constant Load Isotonic = same (iso) tension (tonic) throughout the motion. The force stays constant while the muscle length changes. This includes both concentric and eccentric subtypes below. Constant tension → muscle shortens (concentric) or lengthens (eccentric) → movement occurs CONCENTRIC Shortens Subtype of Isotonic Origin and insertion approach Classic Contraction The muscle shortens as it contracts. Origin and insertion move toward each other. Think: bicep curl brings hand to shoulder. This is what most people mean by "muscle contraction." Contraction → origin and insertion approach → joint flexes/extends ECCENTRIC Lengthens Under Load Subtype of Isotonic Controlled lengthening while resisting Braking Contraction The muscle lengthens while still contracting (resisting the load). Think: slowly lowering a weight. The bicep is active but the arm is straightening. This is the hardest on muscle fibers, which is why DOMS hits hardest after eccentric work. Load exceeds force → muscle resists but lengthens → controlled motion Sort the Treatments One technique at a time. Tap the correct quadrant. Direct vs Indirect. Active vs Passive. Table 1.4 encoded. Direct + Passive Direct + Active 17 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Indirect + Passive Indirect + Active Treatment Planning: Red Light / Green Light Certain patient profiles change what you can do. Two decisions, every time. A 78-year-old with known osteoporosis has a T6 somatic dysfunction. She reports the pain is worse with movement. Which treatment approach is safest? Indirect technique (counterstrain, FPR, or myofascial): avoids high-velocity force across fragile bone HVLA: direct high-velocity thrust is most effective for acute pain MET: muscle energy is always safe regardless of bone density Exactly. Osteoporosis and metastatic cancer to bone are absolute contraindications to HVLA. The reason is simple: a thrust on bone that can't handle it = pathologic fracture. Indirect techniques avoid force entirely. They work by positioning, not by thrusting. This distinction shows up directly in clinical practice: "which patient gets HVLA" vs "which patient does not." Osteoporosis is an absolute contraindication to HVLA. A high-velocity thrust into fragile bone can cause a pathologic fracture. Even if MET feels "safe," direct techniques still apply force to the restriction and carry higher risk. Indirect techniques are the go-to for fragile patients. ✓ Osteoporosis + Metastatic bone disease = NO HVLA. Go indirect. This is absolute. The sequence rule: when treating the thoracic spine AND ribs in the same session, which do you treat first? Thoracic spine first, then ribs (spinal articulations drive rib motion) Ribs first, then thoracic (peripheral to central) Either order is equivalent Right. Thoracic spine before ribs. The rib heads articulate with the thoracic vertebrae, so correcting thoracic dysfunction first removes a driver of rib dysfunction. If you do ribs first, you may just be resetting the same problem. Same logic: upper thoracic before cervical. Treat the root before the branch. Thoracic goes first. Rib heads attach to thoracic vertebrae. If the vertebra is dysfunctional, it's often driving the rib problem. Treating the rib first without fixing the driver just sets you up to redo the work. ✓ Sequence: Thoracic spine → Ribs. Upper thoracic → Cervical. Root before branch, always. BUM BUL BUM Cervical = BUM, Thoracic = BUL, Lumbar = BUM. The L in BUL stands for Lateral AND it's the one that lets the thoracic spine rotate. Medial locks. Lateral unlocks. One letter, opposite 18 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS behavior. ⚖ Iso = Same, Lytic = Break Isometric = same length (no movement). Isotonic = same tension (movement okay). Isolytic = operator breaks the patient's contraction by force. The "lytic" suffix means destruction/breaking, same as "hemolytic" = breaking red blood cells. HVLA Absolute Contraindications Osteoporosis, metastatic cancer to bone, acute fracture, Down syndrome (atlantoaxial instability), severe rheumatoid arthritis (C1-C2). The common thread: bone or ligament that cannot absorb a thrust. Any fragile structural element = no HVLA. Treatment Sequence Rules Always treat proximal before distal: Thoracic before Ribs. Upper thoracic before Cervical. Structural before visceral. And: elderly/fragile = indirect techniques first, direct (especially HVLA) last or not at all. These rules are explicitly tested. Counterstrain is Indirect + Passive Counterstrain: physician moves the patient to the position of ease (indirect = toward ease, passive = physician does the moving). MET is Direct + Active (patient contracts toward bind). HVLA is Direct + Passive (physician thrusts, patient relaxes). Know these three cold. 19 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Fryette's Principles (Full Detail) OMM · SPINAL BIOMECHANICS Fryette's Laws of Spinal Motion Three laws that govern how every vertebra moves, and why ERS/FRS notation makes sense once you know them Medically reviewed by Fatima Ali, DO Opening Challenge A 52-year-old woman presents with chronic thoracic pain. Structural examination with the patient standing reveals a smooth group of vertebrae at T4 through T8 that are all sidebent left and rotated right in the neutral position. No single segment shows flexion or extension restriction. Which of the following best describes this finding? A) Type I dysfunction governed by Fryette's Law I: NSLRR B) Type II dysfunction governed by Fryette's Law II: ERRSR C) Type II dysfunction governed by Fryette's Law I: FRLSL D) Type I dysfunction governed by Fryette's Law III E) Type II dysfunction at each segment independently Type I dysfunction, Fryette's Law I: NSLRR. The key findings: neutral position, multiple vertebrae as a group (T4 through T8), sidebent left and rotated RIGHT. That opposite coupling (sidebend and rotation in opposite directions) is the fingerprint of Law I. Law I governs neutral mechanics in groups. Notation: NSLRR (Neutral, Sidebent Left, Rotated Right). Somatic dysfunctions are named for freedom of motion. The treatment addresses the entire group, not a single segment. Neutral + group + opposite coupling = Law I. Non-neutral + single segment + same-side coupling = Law II. 00 · Anatomy Review Vertebral Anatomy Review Tap each card to reveal the anatomy you need before the laws make sense. ⚫ Vertebral Body Structure Cylindrical weight-bearing anterior part of the vertebra. Largest in the lumbar spine, smallest in the cervical. Stacked bodies form the anterior column that bears axial load. ➡ Transverse Processes (TP) 20 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Structure Lateral projections from each vertebra. In the thoracic spine, they articulate with ribs via costal facets. In the lumbar spine, they are called costal processes. Board key A posterior TP on one side means rotation TO that side. The transverse process follows the vertebral body. If the right TP is more posterior, the body has rotated RIGHT. This is the single most tested palpation finding on the clinical medicine. ⚠ Spinous Process (SP) Structure Posterior midline projection. Palpable landmark for surface anatomy. Board trap SP points OPPOSITE the rotation direction. Right rotation = SP deviates LEFT. Think of the SP as the tail of the vertebra: when the body turns right, the tail swings left. This is a major board trap: students see SP deviated left and write "rotated left." That is the trap. Body rotation is to the RIGHT. Articular Facets Structure Superior and inferior pairs forming zygapophyseal (facet) joints. Their angle determines coupling behavior. Why this matters In the thoracic spine, facet angles are more coronal, allowing rotation as the primary motion. In the lumbar spine, facet angles are more sagittal, favoring flexion/extension and limiting rotation. The facet geometry is WHY coupling patterns differ between neutral and non-neutral positions. Vertebral Foramen Structure Central space housing the spinal cord. The cord terminates at L1 (conus medullaris). Below L1, the canal contains only the cauda equina (nerve roots). Regional differences Thoracic spine has the smallest foramina relative to cord size, making it vulnerable to compression. Cervical foramina are larger and triangular. Lumbar foramina are large. Regional Differences 21 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Thoracic Smallest foramina, rib articulations, kyphotic curve, primary motion is rotation. Coronal facet orientation allows coupled motion in the neutral zone. Lumbar Largest vertebral bodies, lordotic curve, primary motion is flexion/extension. Sagittal facet orientation limits rotation. L5 articulates with the sacral promontory at the lumbosacral junction. 01 · The Framework Three Laws of Spinal Motion Law I: Group Neutral Mechanics In the neutral position (neither flexed nor extended), sidebending precedes rotation. They couple to OPPOSITE sides. This affects a GROUP of 3 or more adjacent thoracic/lumbar vertebrae. The asymmetry does NOT change with flexion or extension. Why is Type 1 always a group? In neutral, no single facet joint is locked or jammed. The facets sit loosely in their articular surfaces, sharing load symmetrically across multiple levels. When the spine sidebends, the coupled rotation is distributed across several segments because no one segment is mechanically captured. The vertebrae tilt together like a row of dominoes leaning the same way. That is why you see a smooth, gentle curve across 3+ segments instead of one abrupt stuck vertebra. The facets are free enough that the mechanical force spreads. Notation: segment, then N (neutral), then sidebend direction, then rotation direction. Example: T7 NSRRL = T7 neutral, sidebent right, rotated left (opposite directions). Treatment: The entire group is treated together, not segment by segment. Law II: Single Segment, Non-Neutral When the spine is in a non-neutral position (flexed or extended), rotation precedes sidebending. They couple to the SAME side. This affects a SINGLE segment. Why is Type 2 always a single segment? When one vertebra is driven into flexion or extension, its facet joints engage asymmetrically. One side jams (the facet surfaces compress together), and the other side gaps open. This mechanical capture locks that ONE segment into a fixed position. Think of it like stepping on one link in a chain: only that link bends. Flexion or extension will either intensify or resolve the asymmetry: if extension resolves it, extension is the direction of ease. Notation: segment, then position (E or F), then rotation direction, then sidebend direction. Example: T7 ERRSR = T7 extended, rotated right, sidebent right (same side). 22 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Why facet orientation determines coupling: The angle of the superior articular facets dictates which motions are mechanically linked. RegionFacet orientationPrimary motion CervicalBackward, Upward, Medial (BUM)Flexion/extension (sagittal) ThoracicBackward, Upward, Lateral (BUL)Rotation (transverse) LumbarBackward, Medial (BM)Flexion/extension (coronal limited) Law III: Restriction in All Planes Movement of any vertebral segment in one plane alters movement in all other planes. Restriction in one plane = restriction in all planes. Applies to cervical, thoracic, and lumbar. This explains why TART findings (tissue texture, asymmetry, restriction, tenderness) cluster at the same segment. A segment that cannot extend also cannot fully rotate or sidebend. Comparison Table: Feature | Law I (Type 1) | Law II (Type 2) Position | Neutral | Non-neutral (F or E) Motion precedence | Sidebending precedes rotation | Rotation precedes sidebending Coupling | OPPOSITE sides | SAME side Segments | Group (3+ adjacent) | Single segment Diagnostic test | Asymmetry UNCHANGED with flex/ext | Asymmetry RESOLVES with flex or ext Notation | NSRRL | ERRSR or FRLSL Treatment | Entire group | Single segment 02 · Interactive — Coupling Predictor: build the rule — Neutral = opposite coupling (sidebending precedes rotation, Law I). Flexed or Extended = same-side coupling (rotation precedes sidebending, Law II). 03 · At the Table — The Examination Examination procedure: Position patient (seated or prone). Palpate TPs of each segment in neutral to find asymmetry. Flex the patient, then extend the patient, checking whether the asymmetry resolves. Which TP is more posterior = rotation direction. Does asymmetry resolve in flex or ext? If yes = Type 2 (non-neutral). If no = Type 1 (neutral). The position that resolves the asymmetry is the direction of ease. Worked example: T7 NSRRL — Left TP of T7 is more posterior (rotation left). Asymmetry does not change during flex/ext. Ease in right sidebending. Neutral dysfunction. Group curve. 23 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS Worked example: T7 ERRSR — Right TP more posterior (rotation right). Asymmetry resolves in extension (direction of ease). Restriction in left sidebending. Type 2 single segment. 04 · Build It — Notation Builder — named for freedom of motion: the notation describes where the segment IS (ease), not where it cannot go (barrier). Decode examples: FRRSR = Flexed, rotated right, sidebent right. Single segment, Law II. NSLRR = Neutral, sidebent left, rotated right. Group curve, Law I. ERLSL = Extended, rotated left, sidebent left. Single segment, Law II. NSRRL = Neutral, sidebent right, rotated left. Group curve, Law I. 05 · Barriers — Barrier Finder: given a notation, identify ease, restriction, and treatment direction. Cervical Spine: The Three Exceptions The cervical spine does NOT follow the thoracolumbar position-dependent switching rule. Each region has its OWN fixed coupling pattern regardless of position. This is a top board trap. OA (Occiput on Atlas): OPPOSITE coupling. Always. Sidebend right = rotation LEFT. Sidebend left = rotation RIGHT. Holds in neutral, flexed, or extended. The biconvex occipital condyles on the concave atlas facets create this unique geometry. Think "Type I-like" but do not call it Type I. C2 through C7 (Typical Cervical): SAME-SIDE coupling. Always. Sidebend right = rotation RIGHT. Sidebend left = rotation LEFT. Position does not change this. Think "Type II-like" but do not call it Type II. AA (Atlas on Axis, C1-C2): Rotation only. No sidebend coupling. The dens (odontoid process) acts as a pivot. C1 rotates around C2 with almost no sidebending component. The trap: a board stem describes a non-neutral cervical finding and asks what coupling applies. Students default to thoracolumbar rules (non-neutral = same-side). That works for C2-C7 by coincidence but FAILS for OA. OA is opposite in every position. Know the joint, not the rule. Treatment Order: Find Type II primary → Treat it first → Reassess group curves → Treat residual Type I if needed. Walk the chain: You find both a Type I group curve (T4-T8) and a Type II single segment (T6 ERRSR). Treat the Type II first — it is the primary lesion driving the compensatory Type I group curve. The group curve often self-corrects once the primary is released; if not, treat the residual group on reassessment. 06 · Regions — Regional Application Lumbar Spine: Largest vertebral bodies, lordotic curve, greatest ROM in flexion/extension. Sagittal facet orientation limits rotation. Landmarks: Iliac crests sit between L4/L5. Spinal cord terminates at L1 (conus medullaris). Below L1 = cauda equina only. 24 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS L5-sacral relationship: L5 sidebends in the same direction as the sacral oblique axis, and rotates opposite to the sacrum on that axis. Static exam: Prone, palpate TPs, roll fingers cephalad (induces flexion) and caudad (induces extension) to check for flex/ext component at each segment. Psoas connection: Nonneutral dysfunction at L1/L2, positive Thomas test, pelvic shift contralateral, tender point 1 cm medial to ASIS. These four findings together = psoas dysfunction. Worsens going from sitting to standing. Thoracic Spine: Smallest foramina, kyphotic curve, greatest ROM in rotation. Coronal facet orientation favors rotation. Rule of Threes (SP location relative to TP): VertebraeSP position T1-T3Same level as TP T4-T6Half-segment below TP T7-T9One full segment below TP T10Same as T7-T9 T11Same as T4-T6 T12Same as T1-T3 Costovertebral relationship: Thoracic SD affects ribs and rib SD affects the thoracic spine. Rib heads articulate at the vertebral body and TP. Sympathetic chain: Ganglia run adjacent to thoracic vertebral bodies. Thoracic SD can affect autonomic tone to visceral organs. Anatomical Landmarks (palpation levels): Vertebral prominence (most prominent SP) = C7 Spine of the scapula = T3 Inferior angle of the scapula = T7 Sternal notch (jugular notch) = T2 Sternal angle (angle of Louis) = T4 (also where rib 2 articulates — key landmark for rib counting) Xiphoid process = T9 (upper boundary of abdomen) Iliac crests (highest point) = L4-L5 interspace (most commonly used landmark for lumbar palpation and LP needle insertion) PSIS (posterior superior iliac spine) = S2 ("dimples of Venus") 25 OMM / OMT BOARD REVIEW PART 1 — FOUNDATIONS 07 · Process of Elimination example: single vertebra at L3 found flexed; sidebent left with rotation left (same-side); tissue texture changes localized to L3 only → Type II dysfunction, Law II. Notation: FRLSL at L3. Barrier: extension, right rotation, right sidebending. Pattern recognition: same-side coupling in any non-neutral position = Law II, single segment, ERS or FRS. Opposite coupling in neutral = Law I, group. 08 · Board Walkthrough highlights: - Posterior right TP at T8; asymmetry unchanged in flexion AND extension = Type 1 (neutral dysfunction, group pattern — check adjacent levels). - T6 ERRSR (Type 2) + T3-T7 group curve (Type 1) together: treat the Type 2 primary first; the group may self-correct once the primary is released. - T6 ERRSR treated with HVLA (direct technique): thrust toward the barrier/restriction = flexion, left rotation, left sidebending (opposite of the ease position). Memory Hooks: 1. Law I vs Law II: "I for Opposite, II for Same." Roman numeral I stands alone = opposite directions; II is a pair walking together = same direction. Neutral = Law I (opposite). Non-neutral = Law II (same). 2. ERS describes ease, not the barrier: "ERS = where the bone parked, not the getaway route." The barrier is the OPPOSITE of the ease position. HVLA chases the getaway route (barrier), not the parking spot (ease). 3. Cervical exceptions: OA = opposite coupling in any position. C2-C7 = same-side coupling in any position. AA = rotation only, no meaningful sidebend. Do not apply thoracolumbar switching rules to any of these. 4. Spinous process vs rotation: SP is the tail of the vertebra — swings OPPOSITE the rotation. Rotation RIGHT = SP deviates LEFT. TP, by contrast, follows the body: prominent on the RIGHT = rotated RIGHT. 5. Type 1 vs Type 2 exam test: Asymmetry resolves with flex/ext = Type 2. Asymmetry unchanged = Type 1. Reviewed by Fatima Ali, DO. Sources: Greenman's Principles of Manual Medicine · Atlas of Osteopathic Techniques (Nicholas) · Osteopathic Medicine (Chila) · Gray's Anatomy plates (Wikimedia Commons) 26 PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS PART 2 SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS IN THIS PART Cervical Spine OMM Lumbar Dysfunctions Thoracic Type II Somatic Dysfunction Rib Mechanics (Pump/Bucket/Caliper) Rib 3-5 Inhalation Dysfunction & Muscle Energy Scoliosis Zink's Common Compensatory Patterns 27 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Cervical Spine OMM OMM · CERVICAL SPINE Cervical OMM — OA, AA, and C2-C7, naming, diagnosing, and treating cervical somatic dysfunction Opening Challenge: 35F neck pain after rear-end collision. OA joint: right occiput posterior and inferior. Tissue texture changes right. Restricted right sidebending and right rotation. Notation = OA ERS right. OA is a Type II (non-neutral) joint, obeys Fryette's Law II. Right occiput posterior = joint moved into extension on that side. Extended + right sidebend + right rotation = ERS right. Named for position it IS stuck in, not where it cannot go. HVLA: flex head, then sidebend/rotate LEFT (toward restrictive barrier), thrust. MET alternative if HVLA contraindicated. Traps: FRS right would mean occiput ANTERIOR (flexed) — opposite of vignette. NS right implies no flex/ext restriction at all (invalid for OA). ERS LEFT would put restriction on left, but posterior occiput/tissue changes are on right. Mnemonic: ERS notation = "parking ticket" — describes where the car (bone) is illegally parked (malposition), not where you want it to go. 01 · CERVICAL ANATOMY & NAMING — three distinct joints, each with own motion rules OA Joint (Occipitoatlantal): between occiput and C1 (atlas). Atlas has no spinous process, no vertebral body — a ring of bone with lateral masses. Primary motion: flexion/extension (nodding). Fryette's Law: Type II ALWAYS. Non-neutral mechanics; sidebending and rotation SAME side. Notation: OA ERS right = extended, rotated right, sidebent right. OA FRS right = flexed, rotated right, sidebent right. Named for position joint IS stuck in (free side). HVLA for OA ERS right: flex head off extension, sidebend/rotate LEFT (toward barrier), thrust. Rule: move toward restrictive barrier, not away. Alternative: MET if HVLA contraindicated/patient prefers gentler treatment. Quick facts: Type II Fryette; nod joint (flex/ext); ERS or FRS notation; HVLA toward barrier. AA Joint (Atlantoaxial): between C1 (atlas) and C2 (axis). C2 has dens (odontoid process) projecting into C1 ring, held by transverse atlantal ligament. Primary motion: ROTATION — ~50% of total cervical rotation. (Nodding is OA's job; rotation lives at AA.) Dysfunction notation: "AA rotated right" = segment IS rotated right; rotation to right is free motion; rotation back left is restricted (barrier). 28 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Absolute contraindications to HVLA at AA: 1. Rheumatoid arthritis with odontoid erosion (pannus erodes dens, destroys pivot; thrust risks spinal cord compression). 2. Down syndrome (ligamentous laxity at transverse atlantal ligament; atlantoaxial instability). Use MET or counterstrain as safe alternative in these populations. Quick facts: 50% of cervical rotation; RA = HVLA contraindicated; Down syndrome = HVLA contraindicated; dens projects into C1 ring. C2-C7 (Typical Cervical): C2-C3 transitional (C2 has bifid spinous process, bridges atypical upper cervical and typical lower cervical). C3-C7 = true typical cervical vertebrae. Motion: all three planes (flex/ext, sidebend, rotation). Fryette's Laws APPLY here (unlike OA/AA). Type I (neutral, group): multiple segments; sidebend/rotation OPPOSITE sides. Example: C3-C5 group, sidebending right + rotation left. Type II (non-neutral, single segment): one segment; sidebend/rotation SAME side. Named for extended/flexed position + side. Notation examples: C5 ERSR = C5 extended, rotated right, sidebent right. C4 FLSR = C4 flexed, sidebent right, rotated right (=FRS right). Key diagnosis rule: spinous process deviates AWAY from direction of rotation. Spinous points right → vertebra rotated LEFT (spinous is posterior; body rotating left sends spinous right). Quick facts: all 3 planes; Type I = group/opposite; Type II = single/same side; spinous deviates OPPOSITE to rotation. Board anchor: OA = nod joint (flex/ext). AA = rotation joint (50% cervical rotation). C3-C7 = standard Fryette's rules. OA and AA are atypical with special motion rules — know which joint you're at before naming the dysfunction. 02 · DIAGNOSIS TECHNIQUES Motion Testing: Active ROM first (patient moves own head — watch for restriction/pain/deviation). Passive ROM (examiner moves head, feels resistance/end-feel/tissue changes per segment). Spring testing (segmental): AP pressure on spinous/TP; normal segment springs back, dysfunctional segment feels stiff/"blocked." Naming rule: segment named for where it went (position it IS stuck in), NOT where it cannot go. Restricted motion right = stuck in left sidebending = named FRS left or ERS left (depending on flex/ext). Quick facts: active then passive; spring test = segmental; named for free side (where it IS). 29 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS TART Criteria: T = Tissue texture changes (acute: warm/edematous/boggy/doughy; chronic: cool/fibrotic/ropy/stringy — most reliable finding). A = Asymmetry (structural position asymmetric vs adjacent segments, via TP/SP palpation). R = Range of motion restriction (barrier). T = Tenderness (local palpation). Reverse mnemonic: STAR (Structural asymmetry, Tissue texture, Asymmetry, ROM, Tenderness). Cervical Treatment Techniques: HVLA (High Velocity Low Amplitude): thrust technique. Patient supine, operator at head of table. Introduce the 3 motion components of dysfunction (e.g. OA ERS right → flex head, left sidebend, left rotate), then rapid low-amplitude thrust at restrictive barrier. Audible pop = joint cavitation, not bone cracking. MET (Muscle Energy Technique): active technique. Bring segment to restrictive barrier. Patient isometrically contracts against operator's unyielding resistance 3-5 seconds. Patient relaxes fully. Operator takes up new (improved) barrier. Repeat 3-5 cycles. Works via post-isometric relaxation + reciprocal inhibition. Counterstrain: indirect technique. Find tender point. Position patient away from tender point into position of ease (preferred shortened position) for 90 seconds. Return slowly to neutral. Tender point should resolve ≥70%. Quick facts: HVLA = thrust toward barrier; MET = 3-5 sec isometric, 3-5 cycles; Counterstrain = ease position, 90 sec. Absolute HVLA contraindications (cervical): rheumatoid arthritis (upper cervical), Down syndrome, severe osteoporosis, acute fracture, vertebrobasilar insufficiency, known metastatic disease to spine, anticoagulation with INR above therapeutic range. When in doubt: MET or counterstrain. 03 · CLINICAL PATTERNS — cervical SD mimicking other diagnoses Cervicogenic Headache: SD at OA, AA, or C2-C3 refers pain to occiput/temporal/retro-orbital area via suboccipital and upper cervical nerves. Distinguishing from migraine: unilateral, non-throbbing, no aura, no nausea/photophobia, aggravated by neck movement/sustained posture, reproducibly relieved by cervical OMT. Diagnostic test: cervical flexion-rotation test — patient fully flexes neck (chin to chest), examiner passively rotates head L/R. Restricted rotation with neck fully flexed → upper cervical (OA-C2) source. Normal rotation ~44° each direction; <32° positive for upper cervical involvement. OMT target: OA dysfunction most common culprit; C2-C3 also common, especially post-whiplash. Torticollis (Wry Neck): Acute torticollis = spasm of sternocleidomastoid (SCM) pulling head into fixed position. SCM runs mastoid process → sternum/clavicle (opposite side). 30 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Positional anatomy: shortened SCM pulls head rotated to OPPOSITE side, laterally flexed (sidebent) to IPSILATERAL side. Right SCM spasm = head rotates LEFT, tilts RIGHT (counter-intuitive). OMT approach: Acute — gentle MET to SCM; do NOT thrust into acute spasm; spray-and-stretch (vapocoolant spray + gentle passive stretch) effective. Subacute/chronic — once spasm resolves, HVLA to underlying segmental dysfunction at C1-C3 appropriate. Congenital torticollis (infants) = SCM fibrosis from birth injury; distinguish from acute acquired. Chapman Points (Cervical): viscerosomatic reflexes — visceral dysfunction creates palpable nodular tissue changes at specific anterior/posterior points. Sinus-related Chapman points: Anterior = between ribs 1-2 anterior chest wall (for sinusitis). Posterior = upper cervical region near OA-C2 (small firm tender nodules). Clinical pattern: recurrent sinusitis + persistent posterior upper cervical SD may reflect viscerosomatic link; treating cervical Chapman points (firm circular pressure 30 sec) + upper cervical OMT can reduce sinus infection frequency (improved lymphatic drainage, normalized autonomic tone). Board point: Chapman points are NOT traditional tender points — palpable ganglionic condensations in fascia. Anterior = diagnostic; posterior = treat. QUIZ HIGHLIGHTS (key teaching points extracted from vignettes) - AA rotation dysfunction + RA: HVLA absolutely contraindicated (pannus erodes dens = "door stopper" preventing C1 sliding into cord); use MET. AA's primary motion is rotation (50% of cervical rotation), not flexion/sidebending. - TART's final "T" = Tenderness on palpation (not temperature/tightness/tone — those fall under Tissue Texture Changes, the first T). - MET protocol: 3-5 second isometric contraction, 3-5 cycles (NOT 10 sec/1-2 cycles, NOT 90 sec — that's counterstrain). Mechanism: post-isometric relaxation via Golgi tendon organ inhibition + muscle spindle reset + reciprocal inhibition; repetitions compound the gain. - Spinous process ALWAYS deviates OPPOSITE to vertebral body rotation direction (steering-wheel analogy: turn wheel left, top goes right). Applies cervical through lumbar. - C5-C6 disc herniation compressing C6 root (biceps weakness, diminished biceps reflex, positive Spurling, radiating pain to thumb/index finger): appropriate OMM = gentle muscle energy/soft tissue positioned AWAY from the provocative direction (not HVLA at the level, not thrust opposite the herniation direction). - RA with odontoid erosion + restricted C1-C2 rotation + suboccipital tenderness: HVLA absolutely contraindicated because of atlantoaxial instability from transverse ligament laxity/dens erosion. 31 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - C4 ERRL dysfunction, MET direction of isometric contraction: INTO extension, right rotation, and left sidebending — i.e., back toward the ease/free position first (patient contracts toward where it CAN go, building the isometric hold), not toward the restrictive barrier directly with the initial contraction (mechanism: contract in the direction opposite the barrier, which is the ease side, per standard MET setup logic in this vignette). [Note: verify this MET-direction phrasing against your course's standard teaching, as different sources describe it as contracting toward the barrier — this page's vignette specifically frames the correct next step as contracting back toward ease/away from the restrictive barrier.] - C5 SD after rear-end collision, most easily positioned in flexion, rotated right, sidebent right → C5 FRSR (flexed, rotated right, sidebent right — same-side coupling, Type II, single segment, acute/traumatic mechanism). - C3-C5 group, all sidebent left and rotated right, neutral zone, no flex/ext restriction → Type I mechanics: group neutral sidebending-rotation with OPPOSITE coupling. MEMORY HOOKS - ERS notation = "crime scene label": names where the bone PARKED itself illegally (malposition), not where it needs to go. - OA = NODDING (saying "No" = head nod = flex/ext). AA = ROTATING (side to side shake = "I don't know"). AA dens = pivot pin for 50% of cervical rotation; no dens = no pivot = no rotation. - RA is an absolute contraindication at AA (dens erosion = lost "stopper" preventing C1 sliding into cord) but not necessarily at C5 (no single structural stopper whose failure = direct cord injury there). 32 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Lumbar Dysfunctions OMM Lumbar Dysfunctions Type 1 vs Type 2. Fryette's Laws. How L5 tells you everything about the sacrum. THE FOUNDATION — Fryette's Three Laws Law 1: Neutral Mechanics (Type 1) — Sidebending and rotation go OPPOSITE. Spine in neutral (not flexed/extended); sidebending one side causes rotation opposite side. Always a GROUP of vertebrae. Notation Pattern: NSLRR = N (Neutral) S (Sidebent Left) R (Rotated Right) Example: L2-L5 all sidebent right, rotated left = NSRRL. Multiple vertebrae, neutral spine, opposite directions. Memory anchor: group of people all leaning one way but looking the other way — the crowd leans together, looks opposite. Law 2: Non-neutral Mechanics (Type 2) — Sidebending and rotation go SAME side. Spine flexed or extended; sidebending and rotation go same side. Single vertebra. Notation: FRSL (Flexed, Rotated & Sidebent Left) / ERSR (Extended, Rotated & Sidebent Right) Example: L4 alone flexed, rotated left, sidebent left = FRSL. Memory anchor: one person, one direction — bending forward/backward rotates and leans the same way. Law 3: Motion Restriction — Motion in one plane reduces motion in others. Flexing the spine (sagittal) reduces ability to rotate/sidebend. Used in muscle energy technique: stack barriers in all three planes to engage the restrictive barrier precisely. Explains why locking techniques work. Summary: Neutral + group + opposite = Type 1 (Law 1). Non-neutral + single + same = Type 2 (Law 2). Law 3 = motion in one plane reduces the others. BOARD TRAP: "Neutral" ≠ "Normal." Neutral means spine not flexed/extended sagittally — NOT "no dysfunction." A Type 1 group curve IS a dysfunction, just in neutral posture. TYPE 1 vs TYPE 2 COMPARISON Type 1 (Neutral/Group) — Fryette's Law 1, NSR notation. Example: NSLRR (Neutral, Sidebent Left, Rotated Right). - Position: Neutral (no flexion/extension) - Segments: Group of 3+ vertebrae, compensatory scoliotic curve - Rotation vs Sidebending: OPPOSITE directions (different letters in notation) 33 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - Sacral Torsion Link: Forward Torsions (L-on-L, R-on-R) — axis and torsion direction MATCH; physiologic, occurs during normal gait Quick ID: Multiple vertebrae + neutral + opposite directions = Type 1. Type 2 (Non-neutral/Single) — Fryette's Law 2, FRS or ERS notation. Flexion type: FRSL. Extension type: ERSR. - Position: Flexed (F) or Extended (E) — locked/non-neutral - Segments: Single vertebra - Rotation vs Sidebending: SAME direction (one subscript for both) - Sacral Torsion Link: Backward Torsions (L-on-R, R-on-L) — axis and torsion direction OPPOSITE; non-physiologic, does not occur in gait Quick ID: Single vertebra + flexed/extended + same direction = Type 2. BOARD TRAP: FRS vs ERS on exam — FRS: TP more posterior/prominent IN FLEXION (worse bending forward), segment stuck in flexion. ERS: TP more prominent IN EXTENSION (worse bending backward), segment stuck in extension. The position that makes asymmetry WORSE tells you what it's stuck in. METHOD — How to Read L5 Findings (4 steps) 1. Is L5 neutral, flexed, or extended? → determines Type 1 vs Type 2. Neutral + moving with group (e.g. L3-L5 together) = Type 1 territory. "L5 is flexed/extended" stated alone = Type 2 territory (only L5 involved, stuck). Exam clue: seated flexion test — if TP asymmetry worsens in flexion → FRS. Worsens in extension → ERS. No change → suspect neutral (Type 1). 2. Which direction is L5 rotated? — named toward the side of the more posterior (prominent) TP. E.g., right TP more posterior → L5 rotated RIGHT. 3. Which direction is L5 sidebent? — toward the concavity (shorter/compressed side). E.g., left side compressed → sidebent LEFT. 4. Same or opposite? — SAME (Type 2, non-neutral, backward sacral torsion; rotation OPPOSITE the oblique axis, L-on-R or R-on-L; spring test POSITIVE). OPPOSITE (Type 1, neutral, forward sacral torsion; rotation SAME side as oblique axis, L-on-L or R-on-R; spring test NEGATIVE). Cheat: L5 same-side = backward torsion. L5 opposite-side = forward torsion. Sacrum and L5 ALWAYS rotate in OPPOSITE directions to each other. PRACTICE EXAMPLES - L5: Neutral, Sidebent Right, Rotated Left → Type 1 (NSRRL); forward sacral torsion (axis and rotation match). 34 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - L5: Flexed, Rotated Left, Sidebent Left → Type 2 (FRSL); backward sacral torsion (L-on-R or R-on-L). - L5: Extended, Rotated Right, Sidebent Right → Type 2 (ERSR); backward sacral torsion. THE SACRAL CONNECTION (L5 → Sacral Torsion) L5 Type 1 (NSR) → Forward Torsion: neutral group curve, opposite S/R directions. Correlates with forward (physiologic) sacral torsion — rotation SAME side as oblique axis (L-on-L or R-on-R). Spring test NEGATIVE; sphinx test IMPROVES asymmetry. Forward torsions occur during normal gait. Example: L5 NSLRR. Sacrum rotates opposite L5 (L5 rotated right → sacrum rotates left). Left rotation on left oblique axis = L-on-L forward torsion. Deep sacral sulcus on the RIGHT (opposite the axis in forward torsion). L5 Type 2 (FRS) → Backward Torsion: non-neutral, same-direction S/R (FRS or ERS). Correlates with backward (non-physiologic) sacral torsion — rotation OPPOSITE the oblique axis. Spring test POSITIVE; sphinx test WORSENS asymmetry. Backward torsions do NOT occur in normal gait. Example: L5 FRSL. Sacrum rotates opposite L5 (L5 rotated left → sacrum rotates right). Right rotation on left oblique axis (axis/rotation opposite) = R-on-L backward torsion. Deep sacral sulcus on the LEFT (same side as axis in backward torsion). Forward Torsions: L-on-L, R-on-R — axis and direction MATCH — associated with L5 Type 1 (NSR) — physiologic, occurs during gait. Backward Torsions: L-on-R, R-on-L — axis and direction OPPOSITE — associated with L5 Type 2 (FRS) — non-physiologic, does not occur in gait. Pattern: Forward = matching letters (L-on-L, R-on-R) = Type 1 at L5. Backward = mismatched letters (L-on-R, R-on-L) = Type 2 at L5. BOARD TRAP: Sulcus side depends on forward vs backward. Forward torsion: rotation SAME side as axis; deep sulcus OPPOSITE the axis. Backward torsion: rotation OPPOSITE the axis; deep sulcus SAME side as axis. Confirmation tests: forward torsion = NEGATIVE spring test + IMPROVES on sphinx. Backward torsion = POSITIVE spring test + WORSENS on sphinx. DIAGNOSIS PRACTICE CASES Case 1: L3-L5 all sidebent left, rotated right, neutral spine → Type 1 Group Curve, NSLRR. Sacral connection: L5 Type 1 → forward sacral torsion. L5 rotated right → sacrum rotates left. Left rotation on left oblique axis = L-on-L forward torsion. Deep sulcus on right. Case 2: Bending forward, left TP of L4 becomes markedly more posterior (not present in neutral/extension), only L4 involved → Type 2: FRSL. Worse in flexion = FRS. Left TP posterior = rotated left; same-side rule → also sidebent left. 35 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Case 3: Prone, spring L2 shows resistance; in extension right TP of L2 more posterior (minimal in neutral/flexion) → Type 2: ERSR. Worse in extension = ERS. Right TP posterior = rotated right; same-side → sidebent right. Treatment (MET): position L2 into flexion (opposite of stuck position), sidebend LEFT, rotate LEFT to engage barrier; patient pushes against resistance, then take up new barrier — always move toward the barrier, not away. Case 4: Chronic LBP; L5 flexed, rotated right, sidebent right; seated flexion test positive on LEFT; deep sacral sulcus on RIGHT; left ILA posterior/inferior; lumbosacral spring test positive → L5 Type 2 (FRSR) → Backward Sacral Torsion. L5 rotated right → sacrum rotates left. Axis/rotation opposite: left rotation on right oblique axis = Left-on-Right (L-on-R) backward torsion. Confirm: in L-on-R, deep sulcus on right (same side as axis), posterior-inferior ILA on left, seated flexion test positive on left (contralateral to right oblique axis), positive spring test confirms backward mechanics. THE LINEUP (flip-card summary) Type I Neutral (NSR): Fryette Law I; multiple segments (group); sidebend/rotation OPPOSITE (convexity = sidebending side, rotation = opposite); cause = postural/adaptive (e.g. carrying a bag); notation N(neutral) S(side) R(rotation opposite side); Rx = treat entire group. Type II Non-Neutral: Fryette Law II; single segment (key segment); sidebend/rotation SAME direction; cause = traumatic/sudden loading/acute injury; position flexed(F) or extended(E); Rx = treat the key dysfunctional segment. Flexed SD (FRSR/FLSL): segment stuck in flexion; opens POSTERIORLY in flexion (facets gap open, spinous processes diverge); restricted extension; Rx = treat in flexion (MET, counterstrain in flexed position). Extended SD (ERSR/ELSL): segment stuck in extension; opens ANTERIORLY in extension (facets load, disc opens anteriorly); restricted flexion; Rx = treat in extension (HVLA or MET in extended position). L4-L5 Disc Herniation: posterolateral herniation most common. L4 root: medial calf, reduced knee jerk, quad weakness. L5 root: dorsal foot, dorsiflexion weakness, no reflex change. SLR positive. Board pearl: foot drop = L5; absent knee jerk = L4. L5-S1 Disc Herniation: S1 root (lateral foot, heel, lateral calf); ankle jerk reduced/absent; weakness in plantar flexion (gastrocnemius/soleus); SLR positive. Board pearl: absent ankle jerk = S1; combine with lateral foot pain = L5-S1. Facet Syndrome: pain worsens with extension and lateral flexion toward painful side; local LBP, may refer to buttock/thigh but NOT dermatomal; older patient with degenerative facets; NO neuro deficits or positive SLR; Rx = OMT, NSAIDs, facet injection if needed. DECISION TREE for Naming a Lumbar SD 1. How many segments involved? - Multiple (group): look at convexity. Convex right → Type I NSR (sidebend right, rotate left), treat whole group. Convex left → Type I NSL (sidebend left, rotate right), treat whole group. 36 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - Single segment: is it flexed or extended? - Flexed (opens posteriorly): sidebends right → Type II FRSR (treat in flexion); sidebends left → Type II FLSL (treat in flexion). - Extended (opens anteriorly): sidebends right → Type II ERSR (treat in extension); sidebends left → Type II ELSL (treat in extension). 37 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Thoracic Type II Somatic Dysfunction OMM · THORACIC SPINE Thoracic Type II Somatic Dysfunction — single segment, non-neutral, same-side coupling CORE DISCRIMINATOR (Type II vs Type I group curve): Type II = ONE segment + flexion OR extension preference (non-neutral) + rotation and sidebending to the SAME side. Type I = MULTIPLE (group) segments + neutral (no flex/ext preference) + rotation and sidebending to OPPOSITE sides. Naming from landmark: the posterior transverse process names the direction of ROTATION (TP points toward the direction vertebral body has rotated — a posterior right TP = body rotated RIGHT). Spinous process alone should NOT replace TP palpation + motion testing (spinous deviates opposite to rotation, a common source of confusion/error if used alone). Flexion/extension testing: asymmetry that WORSENS in flexion = flexed (F) preference; worsens in extension = extended (E) preference — this is what makes the lesion non-neutral (Type II). WORKED EXAMPLE (quick check): T3, right TP posterior, asymmetry worse in flexion (improves with extension), rotation and sidebending both freer to the right → T3 flexed, rotated right, sidebent right (T3 FRSR). One segment + flexion preference + same-side rotation/sidebending = Type II. TRANSLATING DIAGNOSIS → DIRECT MET BARRIER: diagnosis names the position of EASE; the direct treatment barrier is the OPPOSITE of every named component. T3 FRSR (flexed, rotated right, sidebent right = ease) → direct barrier = extension, LEFT rotation, LEFT sidebending (reverse every letter). Patient gently attempts to return TOWARD ease while clinician holds/resists at the barrier (classic direct MET: barrier held by clinician, patient's isometric effort points toward ease). DIRECT MUSCLE-ENERGY SEQUENCE (order) 1. Engage the restrictive barrier without forcing end-range. 2. Gentle isometric effort for several seconds (patient pushes toward ease), then full relaxation. 3. Advance to a new barrier, repeat for a limited number of cycles, return to neutral. 4. Reassess: return to neutral, recheck transverse-process symmetry, tissue texture, and flexion/extension motion — the SAME landmarks/findings that established the diagnosis (not just symptom/pain relief — pain improvement alone does not confirm the dysfunction resolved). SCREENING BEFORE TREATMENT (must clear before loading the segment): rule out fracture, dislocation, unstable vital status, infection, malignancy, major tissue injury, and 38 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS centrally/structurally-driven guarding (splinting from a red-flag cause is NOT a cue to apply more force — it's a stop sign). Patient must understand directions and participate comfortably; a gentle technique is still contraindicated if patient/tissue isn't safe to load. QUIZ / VIGNETTE HIGHLIGHTS - Learner incorrectly calls a segment "rotated left" using spinous-process direction alone, and incorrectly calls it a neutral group diagnosis, despite a posterior RIGHT transverse process and a flexion-worsened asymmetry (single segment) → correct interpretation: posterior right TP = rotated RIGHT, and the flexion/extension component makes it Type II (not Type I; not "any sidebending = Type I"; not "Type II requires ≥3 segments" — all distractors). - T3 FRSR confirmed, red flags cleared, direct MET planned → correct initial barrier setup = extend T3, rotate LEFT, sidebend LEFT (reverse every named component of the ease position) — NOT flex/rotate-right/sidebend-right (that's the ease position, not the barrier) and NOT an uncontrolled thrust. - Previously diagnosed Type II patient now has severe pain after a fall, focal midline tenderness, guarding, cannot comfortably participate → STOP manual treatment, evaluate for fracture/instability FIRST (do not proceed with "gentle" isometric contractions just because MET is generally gentle — trauma + focal bony tenderness changes the priority; a gentle technique is still contraindicated when the patient/tissue isn't safe). - After 3 MET cycles, patient reports improved discomfort; learner wants to end based on symptom relief alone → correct next step = return to neutral and reassess tissue texture, TP symmetry, and flexion/extension motion (objective landmark/motion findings), not declare success from pain relief alone. - T4-T8 smooth neutral curve, group rotated right + sidebent LEFT (opposite sides), doesn't clearly localize to one segment with flexion/extension → this is Type I mechanics (neutral group + opposite coupling), NOT multiple individual Type II lesions just because several right TPs feel posterior — group + neutral + opposite = Type I; single + non-neutral + same-side = Type II (the organizing rule). MEMORY HOOKS - Type II = "SASS": Single segment, Asymmetric (non-neutral, flexed or extended), Same-Side rotation/sidebending. - Direct MET barrier = reverse EVERY letter of the named (ease) diagnosis — F↔E, R↔L, S↔S(opposite side). - Posterior transverse process = rotation direction (primary landmark); spinous process alone is unreliable/insufficient for diagnosis. - Reassessment must re-examine the SAME objective landmarks that made the diagnosis — symptomatic improvement is necessary but not sufficient to declare correction. - Guarding/splinting from trauma or systemic illness is a stop sign, not a "push harder" cue. 39 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Rib Mechanics (Pump/Bucket/Caliper) OMM · RIB MECHANICS Rib Dysfunction: Inhalation vs Exhalation, Pump-Handle vs Bucket-Handle (Note: this page is shorter than most others on the site — its four-row posterior-contact/thrust table is presented as an original illustration image rather than as page text, so only one worked example from the quiz is captured verbatim below; a standard supplemental table is added at the end, clearly marked, since this is bread-and-butter board content.) Learning objectives stated on page: name rib dysfunctions from the position the rib is STUCK in; distinguish pump-handle ribs 1-5 from bucket-handle ribs 6-10; identify the key rib in inhalation vs exhalation dysfunction groups; match each dysfunction to its posterior contact and thrust direction; choose the treatment family that restores the restricted motion. RIB MOTION TYPES (three classes) - Pump-handle, ribs 1-5: motion is at the ANTERIOR end. Inhalation → anterior rib end rises, chest opens forward, increasing the anterior-posterior (AP) diameter. Exhalation → anterior end settles back down. Clue: "upper anterior chest" motion = pump handle = ribs 1-5. - Bucket-handle, ribs 6-10: motion is at the LATERAL shaft. Inhalation → lateral shaft rises up and out (like lifting a bucket handle), increasing the TRANSVERSE diameter. Exhalation → drops back down and in. Clue: lateral/side expansion = bucket handle = ribs 6-10. - Caliper motion, ribs 11-12 (floating ribs): no anterior/sternal attachment, so they flare at the tips like calipers. Do NOT force ribs 11-12 into the pump/bucket contact map — they're a separate category. Quick ID rule: Pump = anterior. Bucket = lateral. Caliper = free (no anterior attachment). NAMING RULE (the board trap): a rib dysfunction is named for the position it is STUCK in, NOT the motion it is missing. - Inhalation dysfunction = rib stuck UP (at the top of the breath). It rose fine but won't come back DOWN on exhalation. Treatment goal: restore the missing downward (exhalation) motion. - Exhalation dysfunction = rib stuck DOWN. It dropped fine but won't RISE on inhalation. Treatment goal: restore the missing upward (inhalation) motion. BOARD TRAP: "a rib that cannot exhale" sounds like it should be named "exhalation dysfunction" — it is NOT. A rib that cannot exhale is stuck UP, so it is an INHALATION dysfunction (named for where it lives/rests, not where it can't go). Same logic as vertebral ERS/FRS naming (named for position of ease/where it IS, not the restricted direction). 40 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Quiz example: "rib drops fine but refuses to rise on inspiration" → this rib is stuck DOWN → Exhalation dysfunction (correctly named, since it's stuck in the exhaled/down position). WORKED EXAMPLE FROM PAGE (posterior contact & thrust logic): 34F rower, right rib 4 pain worse on deep inspiration; structural exam shows rib 4 fails to rise during inhalation, held in the EXHALED (down) position → this is an EXHALATION dysfunction (stuck down, needs to regain upward/inhalation motion). Correct contact/thrust for this setup: contact the SUPERIOR posterior rib angle, thrust CAUDAD (superior posterior rib angle with a caudad thrust). Reasoning given on page: the posterior rib angle behaves like the back end of a seesaw relative to the anterior pump-handle end — so for an exhalation dysfunction (pump-mechanics rib stuck down), the posterior contact/thrust logic is flipped relative to naive intuition; you contact superior and thrust caudad to free the rib back into its normal inhalation (upward) motion. Why the vector matters (page's reasoning): thrusting the wrong direction drives the rib deeper into its stuck position and worsens the patient — this is exactly why exam questions drill the contact/thrust vector so heavily. SUPPLEMENTAL STANDARD TABLE (general OMT teaching, not verbatim page text — included because the page's own table is image-only and this is a heavily tested board topic): - Inhalation (elevated/held-up) rib dysfunction: contact INFERIOR posterior rib angle, thrust CEPHALAD-ish/anterior direction to encourage the rib to drop into exhalation (direction of ease is up; treatment pushes toward the restrictive exhalation barrier). - Exhalation (depressed/held-down) rib dysfunction: contact SUPERIOR posterior rib angle, thrust CAUDAD to encourage the rib to rise into inhalation (as confirmed by the page's own rib 4 example above). General principle to reconcile with vertebral HVLA logic: you always move the segment TOWARD its restrictive barrier (the direction it's missing), using the contact point that leverages the seesaw mechanics of the rib angle — treat toward the barrier, never toward the position of ease. TREATMENT FAMILIES mentioned as objective (page indicates a choice of treatment family that restores the restricted motion — consistent with general OMT toolkit): HVLA (thrust at the posterior angle as above), MET (isometric rib-raising against resistance in the restrictive direction), and rib raising (segmental, often used for autonomic/lymphatic modulation as well as mechanical restriction — see viscerosomatic/autonomic notes files for rib raising's autonomic role). QUIZ HIGHLIGHTS - Rib 4 stuck down/exhaled (exhalation dysfunction) → correct contact = superior posterior rib angle, thrust caudad (NOT inferior posterior angle with cephalad thrust — that combination is a distractor for the opposite dysfunction type). 41 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - "Rib drops fine but refuses to rise on inspiration" → name = Exhalation dysfunction (stuck down = named for the exhaled position). MEMORY HOOKS - PUMP = ANTERIOR, ribs 1-5, changes AP diameter. BUCKET = LATERAL, ribs 6-10, changes transverse diameter. CALIPER = FREE, ribs 11-12, no anterior map. - Name the dysfunction by WHERE THE RIB LIVES (stuck position), not by which motion is missing — identical logic to vertebral Type II ERS/FRS naming. - Wrong-direction thrust = drives the rib deeper into dysfunction = makes the patient worse; this is why boards test the contact/thrust vector so precisely. 42 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Rib 3-5 Inhalation Dysfunction & Muscle Energy OMM · RIB MECHANICS (DETAIL) Rib 3-5 Inhalation Dysfunction and Direct Muscle Energy CORE CONCEPT: Ribs 2-5 pivot near their posterior costovertebral joints; the anterior end swings up/forward on inspiration (pump-handle pattern, widens AP chest diameter). An INHALATION dysfunction = the group stays elevated (stuck at ease toward inhalation) and cannot move freely back into exhalation. KEY RIB of an inhaled group = the LOWEST rib of the group (e.g., for ribs 3-5 inhaled, key rib = rib 5) — diagnosis and treatment both follow the bottom rib. Mirror image: EXHALATION dysfunction = group sits flattened (at ease toward exhalation), restricted toward inhalation; KEY RIB = the TOP rib of the group. Rule to memorize: Inhaled group → key rib = LOWEST. Exhaled group → key rib = TOP (highest) rib. This is the opposite of what many students intuitively guess — a major board trap. ACTIVATING MUSCLE: Pectoralis minor attaches to ribs 3-5 and can hold the pump-handle group elevated (biases it into an inhaled/held-up position). Its tone is part of the pathophysiology of an inhaled rib 3-5 group; treatment can unload this muscle, changing the group's ease afterward. RIB MOTION CATEGORIES (same as prior page, reinforced): Pump-handle = ribs 2-5, anterior end rises/falls with breath (watch anterior arch to judge). Bucket-handle = ribs 6-10, lateral shaft widens the chest side-to-side. Caliper/pincer = lowest ribs (11-12), move posteriorly/laterally in a pincer-like arc. DIRECT MUSCLE ENERGY PROTOCOL FOR AN INHALED GROUP (step order) 1. Identify the key rib — palpate the LOWEST rib of the elevated group. 2. Engage the exhalation barrier — take the key rib toward the exhaled position with CAUDAD pressure (direct technique: move TOWARD the restrictive barrier, i.e., toward exhalation, since that's what's restricted). 3. Hold during exhalation — maintain the rib against the barrier as patient exhales fully. 4. Patient inhales against resistance — gentle 3-5 second isometric effort toward the EASE direction (inhalation) against the clinician's unyielding counter-pressure. 5. Relax and re-engage — on the next exhalation, find the new (improved) barrier and repeat the cycle (typically 3-5 cycles, consistent with standard MET dosing elsewhere on the site). 6. Reassess motion — confirm the group now travels freely into exhalation. 43 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS BOARD TRAP: the patient's isometric effort is INHALATION (moving toward ease), even though the clinician is holding/engaging the EXHALATION barrier — direct MET always has the patient push toward ease/away from the barrier the clinician is holding, this is the standard reciprocal-inhibition setup, not a rib-specific quirk. For an EXHALED group (mirror image), treatment direction reverses: engage the INHALATION barrier on the key rib (the TOP rib), patient's isometric effort runs toward exhalation (ease), then reassess for inhalation excursion. RED FLAGS — STOP AND EVALUATE FIRST, do not proceed with muscle energy: acute trauma, unexplained/new chest pain, fever, suspected fracture, point tenderness with a fall history, new cough with fever after trauma, warmth over the region. OMT is not a substitute for diagnosing injury or disease — image/work up first, treat after red flags are cleared. Reassessment criteria after each MET cycle: excursion on exhalation, ease of the group in its new position, and whether tenderness changed — NOT simply counting repetitions. Sharp pain, new point tenderness, or a new limitation after treatment = stop and re-examine, don't push harder. QUIZ / VIGNETTE HIGHLIGHTS - 40F/35M runner/swimmer, post-viral cough, ribs 3-5 elevated + reduced exhalation excursion, no red flags → key rib = LOWEST rib of the group (rib 5) for direct MET. - 50M heavy lifter, ribs 3-5 FLATTENED vs contralateral side, moves freely into exhalation but restricted on deep inhalation → this is an EXHALED group (inhalation dysfunction... wait: named "exhalation dysfunction" since it's at ease toward exhalation) → key rib = TOP rib (rib 3), treatment engages the inhalation barrier. - 28M athlete, known inhaled rib 3-5 group on left, clinician holding exhalation barrier + caudad pressure on rib 5, patient breathes gently against resistance 3-5 sec → patient's effort is a gentle attempt TOWARD THE EASE DIRECTION (inhalation) against the barrier — not "pushing deeper into the restrictive barrier," not a voluntary-exhale test. - 45M office worker, pectoralis minor tenderness reproducing the ache, confirmed inhaled rib 3-5 group (free into inhalation, restricted into exhalation) → activating muscle tied to this pump-handle group = pectoralis minor (attaches ribs 3-5, can hold group elevated) — not diaphragm, lat dorsi, serratus anterior, or scalenes. - 60M smoker, ground-level fall, rib group stuck at end-inhalation + point tenderness + pain on deep breath + new cough/fever a day after the fall + warmth over region → do NOT engage the barrier/start MET; correct next step = obtain chest imaging and evaluate the injury FIRST (rule out fracture/infection before any manipulation). MEMORY HOOKS - "Inhaled → key on the LOW rib; Exhaled → key on the TOP rib" — mirror-image key-rib rule. 44 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - Direct MET = clinician holds/engages the BARRIER; patient's isometric push always goes toward EASE (the opposite direction of the barrier). - Pump-handle ribs (2-5) = anterior arch motion, AP diameter; pectoralis minor is the classic activating muscle for a stuck-elevated (inhaled) rib 3-5 group. - Red flags (trauma + fever + point tenderness + new cough) always override rib-group treatment logic — evaluate before manipulating. 45 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Scoliosis SCOLIOSIS: THE BACKWARDS NAME Why "dextro" means left and your brain hates it. Naming, classification, rib humps, structural vs functional. Key trick: dextroscoliosis means vertebrae sidebent LEFT (not right). Name describes convexity (bump-out side), not sidebend direction. Convexity is OPPOSITE the sidebend. Dextro = convexity points RIGHT ("DominanD hanD" = right). Vertebrae bend the OTHER way (left). THE RULE: Scoliosis is ALWAYS named by direction of CONVEXITY (side curve bows OUT toward), never by sidebend direction. Chain: Vertebrae sidebend LEFT → concavity forms LEFT → convexity bows out RIGHT → named by convexity = DEXTRO. Bow analogy: pull string LEFT (sidebend) → bow curves out RIGHT (convexity) → name the bow by where it points, not where you pull. Reverse: sidebend RIGHT → concavity RIGHT → convexity LEFT → LEVO. RIB HUMP CONNECTION: In a structural curve, vertebral bodies rotate TOWARD the convexity. Ribs bolted to vertebral bodies get shoved backward on convex side → posterior rib hump visible on Adam's forward bend test (patient bends forward, arms hanging, knees straight; examiner looks from behind). Rib hump = structural scoliosis. No hump = functional. Chain: Structural curve → vertebral bodies rotate toward convexity → ribs follow body → rib hump on CONVEX side. Rib hump on RIGHT = convexity RIGHT = dextroscoliosis. The hump literally points at the answer. STRUCTURAL vs FUNCTIONAL Structural (the real deal): vertebrae physically wedged, rotated, stuck. Curve built into bone. - Sidebend correction: does NOT correct with opposite sidebending - Adam's test: rib hump present (vertebral rotation) - Vertebral rotation: fixed; spinous processes deviate toward concavity - Cause: idiopathic (most common, adolescent girls), congenital, neuromuscular - X-ray: Cobb angle measures severity; vertebral wedging visible - Analogy: tree that grew crooked — can't straighten by pushing, wood itself is bent Functional (the impostor): spine LOOKS curved, bones are fine, something else pulling it off-center. 46 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - Sidebend correction: CORRECTS with opposite sidebending - Adam's test: no rib hump (no vertebral rotation) - Vertebral rotation: none, spine structurally normal - Cause: leg length discrepancy, muscle spasm, pain-guarding, herniated disc - X-ray: no vertebral wedging; curve disappears on lateral bending films - Analogy: leaning because one shoe has thicker sole — remove shoe, straight again BOARD TRAP: "Does not improve with sidebending" = structural (if it corrected, it'd be functional). This clue appears in almost every scoliosis question. Key: Structural = Stuck. Functional = Flexible. FRYETTE'S LAWS & SCOLIOSIS: Group curve findings ("L1-L5 neutral, sidebent right, rotated left") = Fryette's Type I behavior (neutral spine, sidebend/rotation opposite directions, grouped vertebrae). Type I (group): Neutral position; opposite S/R directions; e.g. L1-L5 neutral, SB right, rot left → group lumbar curve. Type II (single): Flexed or Extended; same S/R direction; e.g. T6 flexed, SB left, rot left → single segment dysfunction. In scoliosis, group curves follow Type I mechanics. Sidebend tells you concavity side; flip it for convexity → gives the name. Example: sidebent RIGHT → concavity RIGHT → convexity LEFT → levoscoliosis. NAME THAT CURVE practice: - Posterior rib hump LEFT at T5-T10 on forward bending; curve does NOT correct with right sidebending → Structural levoscoliosis (hump left = convexity left = levo; doesn't correct = structural). - L1-L5: neutral, sidebent left, rotated right; curve corrects with right sidebending → Functional dextroscoliosis (corrects = functional; sidebent left → convexity would be right = dextro naming convention still applies to describe the curve pattern, though functional curves are typically named descriptively too). T3-T12 right-sided convexity, Cobb 35°; L1-L5 left-sided convexity → Thoracic dextroscoliosis + lumbar levoscoliosis. Idiopathic (80%, most common) — Adolescent Idiopathic Scoliosis (AIS): peak onset 10-18y, especially girls. Right thoracic curve classic. Cobb angle determines treatment. Cobb thresholds: <25° = observe. 25-40° = brace (TLSO). >40-45° = surgical fusion. >50° in adults = progressive. Screening: Adam's forward bend test; rib hump = structural = rotation confirmed. 47 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Congenital — vertebral formation failure (hemivertebrae) or segmentation failure (bar). Present at birth/found in infancy. Associated with VACTERL anomalies (cardiac, renal, tracheoesophageal) — always get cardiac echo + renal ultrasound. Board trap: does NOT correct with sidebending; progresses rapidly during growth spurts. Neuromuscular — caused by cerebral palsy, Duchenne MD, spina bifida, Friedreich ataxia. Muscle imbalance drives curve. Long C-shaped curve (vs S-curve in idiopathic). Progresses even after skeletal maturity. Often needs surgery at lower Cobb angles than idiopathic. ALWAYS structural — no functional neuromuscular scoliosis. PATTERN ANALOGY (EKG axis deviation): Scoliosis naming works like EKG axis naming — name the OUTPUT direction (where curve/vector points), not the INPUT (which way vertebrae bend/which fascicle pulls). Left axis deviation = vector points LEFT even though problem may be left anterior fascicle pulling it there. EXAM DAY ALGORITHM (4 steps) 1. Does curve correct with opposite sidebending? Yes → Functional. No → Structural. 2. Where is convexity? (rib hump side, stated convexity, or flip sidebend direction). Convexity RIGHT → Dextro. Convexity LEFT → Levo. 3. Which region? Name each region separately (e.g. "thoracic dextroscoliosis with lumbar levoscoliosis"). 4. Assemble: [Structural/Functional] [region] [dextro/levo]scoliosis. Cobb angle measured between most tilted vertebra above and below curve apex (line along superior endplate of top vertebra, inferior endplate of bottom vertebra; angle between lines/perpendiculars). - Cobb <25°: Observe only. X-ray every 6-12 months. No brace. Upgrade to bracing if curve increases 5-10° on two consecutive X-rays. - Cobb 25-40°: Check skeletal maturity via Risser sign (iliac apophysis ossification, grades 0-5). Risser 0-2 (growing) → Brace (TLSO), worn 16-23 hrs/day. Compliance matters: 16+ hrs/day prevents progression in 72% of patients vs 48% low-compliance. Goal = STOP progression, not correct curve. Risser 4-5 (mature) → Observe, no brace (bracing ineffective after growth complete). - Cobb >40-45° (immature) or >50° (mature): Surgical spinal fusion. Posterior spinal fusion with instrumentation — corrects and stabilizes permanently. Neuromuscular scoliosis may need surgery at lower Cobb angles due to faster progression. Rule: 25-40-45 = Watch / Brace / Cut. CLASSIFICATION DECISION TREE 1. Does curve correct on Adam's test / lateral bending? Structural = does NOT correct. 48 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS 2. Structural + rib hump present. Cause? - Idiopathic (~80%, no identifiable cause, adolescent girls, right thoracic curve) → AIS. Cobb <25° observe (repeat X-ray q6mo, intervene if progresses ≥5°). Cobb 25-45° brace (Milwaukee = cervical to pelvis, or Boston = TLSO, more common; 16-23 hrs/day; goal stop progression; Risser 0-2 = brace, Risser 4-5 = observe). Cobb >45-50° surgical correction (posterior spinal fusion with instrumentation) — indicated when bracing fails or late presentation with large curve. - Congenital (hemivertebra, vertebral fusion, present at birth) → high risk rapid progression, treat early, surgery often needed in childhood, rule out cardiac/renal anomalies. - Neuromuscular (CP, MD, spina bifida) → C-shaped curve typically; bracing less effective (poor muscle control); surgery indicated when curve interferes with sitting balance/respiratory function; lower Cobb threshold for surgery than idiopathic. 3. Non-structural (functional) — corrects with bending/lying down/removing cause. No true vertebral rotation. Causes: leg length discrepancy (pelvic tilt), paraspinal muscle spasm, antalgic posture from herniated disc. Treat underlying cause; OMT highly effective. Heel lift for leg length discrepancy. Reassess after correction. OMT role: functional scoliosis responds well to OMT. Structural scoliosis responds less for curve correction, but OMT addresses compensatory somatic dysfunctions and improves quality of life. Zink patterns frequently present. Treat compensatory dysfunctions even if structural curve itself can't be corrected. BOARD WALKTHROUGH KEY TEACHING POINTS - Cobb angle measurement: use superior endplate of the UPPERMOST end vertebra and inferior endplate of the LOWERMOST end vertebra (not both superior, not apical vertebra bilaterally). - 14F, Adam's test shows right rib hump, 28° right thoracic curve, 2 years growth remaining → most appropriate next step = thoracic bracing (Boston brace) to halt progression (not observation only, not surgery, not PT alone). - Right-sided rib hump on Adam's test mechanism: vertebrae in the curve rotate TOWARD the convex side, carrying ribs posteriorly, creating the hump on the CONVEX side (not concave; not from muscle hypertrophy; hump does NOT disappear in structural scoliosis on forward bending — it appears/is confirmed then). - 16M, 23° lumbar curve, not progressed in past year, Risser stage 4 (nearly mature) → most appropriate management = observation with reassessment at skeletal maturity; low risk of progression (not brace, not OMT to reduce curve, not fusion). - Boston brace purpose: designed to HALT curve progression until skeletal maturity, preventing worsening — NOT to straighten curve to 0°, NOT to eliminate rib hump permanently, NOT to prevent all activity restrictions. 49 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS Zink's Common Compensatory Patterns OMM · FASCIAL PATTERNS Zink's Common Compensatory Patterns — four transitional zones, alternating fascial rotation, respiratory-circulatory model THE FOUR ZONES (top to bottom): OA (occipitoatlantal, skull↔C1) → CT (cervicothoracic, C7↔T1) → TL (thoracolumbar, T12↔L1) → LS (lumbosacral, L5↔S1). Each is where spinal curvature reverses; fascia develops a rotation preference at each. COMMON PATTERN (~80% of healthy adults): L-R-L-R = OA Left, CT Right, TL Left, LS Right. Mnemonic "Marching Order" — always start marching with the LEFT foot. UNCOMMON PATTERN (~20% of healthy adults): R-L-R-L = OA Right, CT Left, TL Right, LS Left (exact mirror image — "started with the wrong foot"). Both patterns are equally healthy/compensatory — the key feature is that they ALTERNATE, not which direction starts. BOARD TRAP: "Common" ≠ "normal" and "uncommon" ≠ "abnormal." Both are normal/compensatory. Only non-alternating patterns are pathologic. NON-COMPENSATORY PATTERN: rotation does NOT alternate at every zone (e.g., L-L-R-L, R-R-R-L — any two adjacent zones same direction). Signifies body has failed to self-correct: significant somatic dysfunction, trauma (recent/old), hospitalized/decompensated patients, structural pathology. Direction (which starts at OA) only tells you common vs uncommon; ALTERNATION tells you healthy vs sick. BOARD TRAP: a vignette describing a hospitalized patient with non-alternating rotation wants "non-compensatory" as the answer — not "common" or "uncommon" (neither applies). WHY IT ALTERNATES (reasoning model): fascia is one continuous web skull-to-sacrum. If every zone twisted the same direction, the biases would stack and the head would drift off the pelvis midline. Counter-rotating each zone against its neighbor cancels the twists, keeping eyes level over the base (block-stacking analogy: lean all blocks same way = top block falls off; alternate directions = stack stays centered). This is a conceptual model, not a measured force. RESPIRATORY-CIRCULATORY MODEL LINK: each of the 4 transitional zones sits near one of the body's 4 transverse fascial diaphragms (fluid pumps for venous/lymphatic return): - OA → tentorium cerebelli (cranial diaphragm) — venous drainage from head. - CT → thoracic inlet — drainage gateway for head/neck/arms; treat this FIRST or everything downstream backs up. - TL → respiratory diaphragm — the primary pump, driven by every breath (central venous return). 50 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS - LS → pelvic diaphragm — the floor; returns venous/lymphatic flow from legs/pelvis. Model's logic: balanced (alternating) fascial tension = pumps glide freely. Broken alternation = the diaphragm at that level stops gliding = fluid pools/stalls behind it. Boards test the pattern; clinicians lean on the fluid-mechanics reasoning. Structural Compensatory (functional) Forward bend curve + rib hump PERSIST curve DISAPPEARS Flexibility rigid, fixed bone flexible, positional Rotation true rotation into convexity → rib hump little to none Size usually larger (the primary curve) smaller, just enough to balance What it is the problem the body solving the problem Single best test: bend patient forward — curve that stays = structural; curve that vanishes = compensatory. A compensatory curve can stiffen into a structural one if left too long — hence testing rather than assuming. MEMORY HOOKS - MARCHING ORDER: L-R-L-R, left foot first = common. R-L-R-L = uncommon (wrong foot first). - ALTERNATING = ALIVE: alternating = compensatory = healthy self-correction; non-alternating = body has given up (like both feet stepping the same direction = falling, not walking). - OA IS THE ANSWER: board questions almost always ask about OA specifically. "Common compensatory pattern" + asks about OA → answer LEFT. "Uncommon" + OA → answer RIGHT. - THE MIRROR RULE: uncommon is common with every direction flipped — memorize one, get the other free. Odd zones (OA, TL) match each other's direction; even zones (CT, LS) match each other's direction, within a given pattern type. - Type A Compensation = alternate name for the Common Pattern (L-R-L-R) — boards may use "Type A" or "common" interchangeably. DECISION TREE 1. Does rotation ALTERNATE at every zone? (check alternation FIRST, not direction) - YES → check OA direction: Left → Common Compensatory (verify CT-right, TL-left, LS-right); Right → Uncommon Compensatory (verify CT-left, TL-right, LS-left). - NO (≥2 adjacent zones same direction) → Non-Compensatory Pattern → consider trauma/hospitalization/decompensation/significant SD. 51 OMM / OMT BOARD REVIEW PART 2 — SPINE — CERVICAL, THORACIC, LUMBAR, RIBS, SCOLIOSIS BOARD TRAP: direction only matters after alternation is confirmed; a non-alternating pattern is never labeled "common" or "uncommon" regardless of where it starts. QUIZ HIGHLIGHTS - OA left, CT right, TL left, no scoliosis on x-ray → common pattern predicts LS = Right rotation (completing L-R-L-R). - The four zones are linked to fascial screening because they sit at points where spinal curvature changes direction (not "four diaphragms" as the direct anatomic answer to that specific phrasing, and not fracture sites or pediatric-only). - Structural thoracic curve, apex extended + sidebent right + rotated right (same-side coupling) → explained by Fryette's Principle II (non-neutral mechanics), NOT the Zink model — Zink governs fascial rotation patterns, Fryette governs vertebral mechanics; don't cross-apply. - Anterior/inferior left sacral base + restricted LS fascial motion + pelvic pain/leg heaviness → respiratory-circulatory mechanism = fascial restriction compresses/distorts vessels and lymphatics traversing the lumbosacral region (NOT a CSF-pressure or denervation mechanism — those are distractors). - Hospitalized patient, shallow breathing, fascial screening OA-left, CT-left, TL-right, LS-left → decompensated because TWO ADJACENT zones (OA and CT, both left) rotate the SAME direction, breaking the alternating pattern (not because of a leftward "majority," not "automatically" from not matching L-R-L-R format alone, not because of sacral base leveling — the mechanism is specifically the broken alternation between adjacent zones). 52 PART 3 — PELVIS & SACRUM PART 3 PELVIS & SACRUM IN THIS PART Sacral Diagnosis (Sacral Dysfunctions / Torsions) Innominate Rotations Innominate Shears & Flares Posterior Innominate Rotation & Hamstring Dysfunction Pregnancy Biomechanics & Lumbar Lordosis 53 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Sacral Diagnosis (Sacral Dysfunctions / Torsions) [URL: /OMM/SACRAL-DYSFUNCTIONS/DEEP-DIVE.HTML — RENDERS AS "SACRAL DIAGNOSIS: SEATED FLEXION, SPHINX & ILA"] Osteopathic Manipulative Medicine — Sacral Diagnosis Made Dead Simple Six rules and one diagonal line. Opening case: 28M, 3 days LBP no injury. Standing AND seated flexion positive right. Right sacral sulcus deep, left ILA posterior, lumbosacral spring test negative. Diagnosis = Left-on-left forward torsion; L5 will be NRRSL. Logic: Deep RIGHT sulcus → base sank forward on right → rotated LEFT (rotation opposite deep sulcus, like pushing top-right corner of card rotates face left). Seated flexion positive RIGHT → LEFT oblique axis (positive is on side OPPOSITE the axis). Left rotation on left axis = Left-on-Left = same letters = forward; negative spring confirms. LANDMARKS: Sacrum = see-saw lever. Lumbosacral junction (top) = fulcrum. Base (top) and ILAs (bottom corners) = two lever ends. SI joints = hinges on each side. Push one end, other end swings opposite way — the whole topic in one idea. THE SACRAL DIAMOND (core mental model): Sacrum = stiff card. Push a top corner forward (toward the table) → whole face turns the OTHER way. Push top-RIGHT corner → face rotates LEFT. That pushed corner = deep sulcus. Diamond pivots on its diagonal: far bottom corner (ILA) swings posterior, whole face turns opposite side. Deep sulcus and posterior ILA ALWAYS land on opposite corners in a torsion. Rule 1 (Which test): Standing flexion = innominate. Seated flexion = sacrum. Why: sitting plants pelvis, removes legs from motion, isolates sacrum-on-pelvis movement. Standing lets legs drive ilia = tests innominate. The PSIS that rises = stuck side. Mnemonic: Seated = Sacrum (S=S). Standing on legs = innominate. Pop quiz: standing flexion positive right, seated negative, asymmetric sulcus felt → still INNOMINATE (negative seated flexion takes sacrum off the table regardless of palpation). Rule 2 (Sulcus → rotation): Deep sulcus = base dove forward = sacrum rotated to OPPOSITE side. Deep = Dove away. Deep RIGHT sulcus → rotated LEFT. Pop quiz: deep LEFT sulcus → rotated RIGHT (not left) — rotation always opposite the deep sulcus. Rule 3 (Seated flexion → axis): Seated flexion positive OPPOSITE the oblique axis. Why: oblique axis = locked diagonal sacrum pivots on; corner off-axis is free, dragged up during forward bend, that PSIS rises. Positive (free) side is AWAY from axis. Pop quiz: seated flexion positive LEFT + right sulcus deep → RIGHT axis (positive opposite axis), rotated LEFT (deep right sulcus) = Left-on-Right. 54 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Rule 4 (Naming): Name it rotation-on-axis. Same letters = forward (L-on-L, R-on-R). Different letters = backward (L-on-R, R-on-L). BOTH are dysfunctions — this only tells direction. Same-side letters = sacrum rotates toward its own axis side = stuck forward/flexed/nutated (everyday gait-type torsion). Different letters = twisted opposite its axis = stuck backward/extended (trauma-type). Spring test confirms. Pop quiz: sacrum rotated LEFT on RIGHT oblique axis (different letters, L on R) = BACKWARD, positive spring. Rule 5 (The shape): Opposite corners (deep sulcus + posterior ILA on opposite sides) = torsion. Same side = unilateral. Symmetric (both sides) = bilateral (seated flexion falsely negative since nothing asymmetric). Pop quiz: deep RIGHT sulcus AND posterior RIGHT ILA (same side) = NOT torsion, it's unilateral. Rule 6 (Spring/Sphinx): Feel it HARD (hits wall) = stuck further BACK (positive spring = backward/extended, can't go forward). Feel it GIVE (springs) = still can go FORWARD (negative spring = forward/flexed problem). Pop quiz: seated AND standing flexion both negative, spring test positive, patient can't stand straight → BILATERAL dysfunction (symmetric = false-negative flexion tests; positive spring is the only test that catches it). THE TRAP: L-on-L and L-on-R feel IDENTICAL under the hands (both give deep RIGHT sulcus + posterior LEFT ILA, since both are a left rotation). Palpation only tells rotation. Seated-flexion side reveals the AXIS; spring test reveals forward vs backward. Must check both or you're guessing between normal gait pattern and traumatic lock. Left-on-Left (forward torsion, physiologic): Seated flexion + RIGHT. Deep sulcus RIGHT. Posterior ILA LEFT. Axis LEFT oblique. Spring NEGATIVE. L5 = NRRSL. (Sacrum rotated left, on left axis, L5 rotates opposite sacrum [right] and sidebends toward axis [left].) Right-on-Right (forward torsion): mirror of L-on-L. Seated flexion + LEFT. Deep sulcus LEFT. Posterior ILA RIGHT. Axis RIGHT oblique. Spring NEGATIVE. L5 = NRLSR. Left-on-Right (backward torsion, non-physiologic): Seated flexion + LEFT. Deep sulcus RIGHT. Posterior ILA LEFT. Axis RIGHT oblique. Spring POSITIVE. L5 = FRRSR (Type II non-neutral; could equally be ERRSR). Right-on-Left (backward torsion): mirror. Seated flexion + RIGHT. Deep sulcus LEFT. Posterior ILA RIGHT. Axis LEFT oblique. Spring POSITIVE. L5 = FRLSL (or ERLSL). Unilateral Flexion (transverse axis): Seated flexion + on affected side. Deep sulcus affected side. Posterior ILA SAME (affected) side. Spring NEGATIVE. Sphinx IMPROVES. Lordosis INCREASED. (Deep sulcus AND posterior ILA on SAME side = unilateral, not torsion — whole side nodded forward.) 55 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Unilateral Extension: Seated flexion + affected side. Shallow sulcus affected side. Anterior (deep) ILA SAME (affected) side. Spring POSITIVE. Sphinx WORSENS. Lordosis DECREASED. To separate from backward torsion: check ILA — same-side anterior ILA = unilateral extension; opposite-side = torsion. Bilateral Flexion: Seated flexion FALSE negative. Sulci deep both sides. ILAs posterior both sides. Spring NEGATIVE. Lordosis INCREASED. Key sign: can't stand straight. Seen in rowers, cyclists, sustained flexion postures. Bilateral Extension: Seated flexion FALSE negative. Sulci shallow both sides. ILAs anterior both sides. Spring POSITIVE. Lordosis FLAT BACK. Key sign: can't stand straight. "Lead-apron"/sustained-extension picture. SACRAL AXES (5 total): Left oblique, Right oblique (2 run corner-to-corner = torsions), Superior/S1, Middle/S2, Inferior (3 run side-to-side = transverse). Oblique = twist/torsion. Transverse: S1 = breathing (respiratory), S2 = bending, Inferior = ilia-related. Sacral vs innominate: Seated flexion is the referee. Both flexion tests positive = sacrum. Standing positive but seated negative = innominate (iliosacral). Anterior innominate: ASIS inferior + PSIS superior (same side) — "long-leg look." Posterior innominate: reverse. Pop quiz: standing flexion + right, seated negative, right ASIS inferior + right PSIS superior → Anteriorly rotated RIGHT innominate (not a sacral torsion). Unilateral vs backward torsion: Check the ILAs. Shallow sulcus could be unilateral extension OR backward torsion. Deep (anterior) ILA on SAME side as shallow sulcus = unilateral extension. Deep ILA on OPPOSITE side = torsion. Pop quiz: shallow LEFT sulcus, LEFT ILA deep (anterior, same side) → Left unilateral extension (not torsion). Torsion vs bilateral: A positive seated flexion means NOT bilateral (torsions/unilaterals give one positive seated flexion; bilateral is symmetric → false-negative seated flexion; only spring test + inability to stand straight + often pelvic side-shift/apparent long leg reveal it). Pop quiz: both flexion tests negative, deep sulci bilaterally, negative spring, can't stand straight → Bilateral flexion. CLINICAL LIGAMENTS: Interosseous SI = deep SI shock absorber. Sacrotuberous = sit-bone anchor/pelvic floor, resists nutation. Iliolumbar = L5 anchor. Uterosacral = sacrum-to-pelvic-pain link (tethers cervix to sacrum; sacral dysfunction stretches it, refers pelvic pain — relevant to chronic pelvic pain + uterine retroversion cases). DIAGNOSTIC ALGORITHM EXAMPLE: 40M acute LBP after twisting to lift heavy box. Standing AND seated flexion both positive LEFT → first conclusion: Sacral problem, left side restricted (both tests positive = sacral, not innominate). TREATMENT (Muscle Energy) — ONE RULE: Axis side always goes DOWN. Then forward vs backward setup differs (Forward = face down, push ankles. Backward = face up, push knee). 56 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Why axis-side-down: oblique axis = hinge sacrum is stuck on. Lay patient on that side pins the axis corner to the table so it can't move; gravity + free leg unwind the twist around it. Patient's own muscle contraction (you resist) rotates the sacrum off the axis: push, resist 3-5 sec, relax, take up new slack. Forward torsion (L-on-L, R-on-R) treatment: Position = Modified Sims, axis side DOWN, patient face DOWN (forehead toward table). Setup: both legs hang off table edge (adds sidebending); flex to engage lumbosacral junction. Force: patient lifts both feet toward ceiling against resistance, 3-5 sec hold, 3-5 reps. Why: forward torsion is physiologic/follows gait; face-down + dropped legs lets gravity + leg-lift carry sacrum back toward neutral along its axis. Memory: FORWARD = FACE DOWN (forehead on table), push the ankles. Backward torsion (L-on-R, R-on-L) treatment: Position = Lateral recumbent, axis side DOWN, patient face UP (back toward you). Setup: hips flexed ~30° to extension barrier; top leg dropped off table. Force: patient pushes top knee up against resistance, 3-5 sec hold, 3-5 reps. Why: backward torsion stuck in extension/non-physiologic; face-up + flexed hips opens the extension barrier; pushing bent knee recruits piriformis to pull sacrum forward and derotate. Memory: BACKWARD = BACK DOWN (face up), push the knee. Unilateral flexion treatment: Position = Prone, hypothenar on affected ILA. Force: anterior pressure on ILA during INHALATION, resist on exhalation, 3-5 cycles. Why inhale: sacrum rides the breath — on inhalation it EXTENDS/counter-nutates (base rocks posterior, ILA swings anterior). Unilateral flexion is stuck FLEXED (base anterior) so treat on the breath that pulls it the other way (inhale); push ILA anterior on inhale rides built-in extension, hold gain on exhale. Memory: INHALE = sacrum EXTENDS, so a FLEXED sacrum is treated on the IN-breath. Unilateral extension treatment: Position = Prone, hypothenar on affected sacral base. Force: anterior pressure on base during EXHALATION, patient inhales and resists, follow anteriorly on exhale, 3-5 cycles. Why exhale: mirror image — on exhalation sacrum FLEXES/nutates (base rocks anterior). Unilateral extension stuck EXTENDED (base posterior), ride the exhale that carries base forward. Memory: EXHALE = sacrum FLEXES, so an EXTENDED sacrum treated on the OUT-breath. (Flexed=inhale, Extended=exhale — always opposite breath.) Bilateral flexion/extension treatment: Flexion — Supine, knees flexed, hyperflex toward chest to engage LSJ, patient pushes knees away against resistance. Extension — Prone sphinx, thenar on sacral base, anterior pressure on exhale, patient inhales and resists. Why: both sides stuck same way, push the whole sacrum the OTHER way. Bilateral flexion stuck nutated forward → drive into extension (knees to chest tips sacral base back). Bilateral extension stuck back → push base forward on exhale to flex it. Memory: stuck flexed → push extended; stuck extended → push flexed. THE WHOLE PAGE IN 8 LINES 1. Which test: both flexion positive = sacrum. Standing-only = innominate. Positive side = restricted side. 57 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM 2. Deep = Dove (rotation): deep sulcus = that base dove forward, sacrum rotated OPPOSITE side. 3. Away from the axis: oblique axis is OPPOSITE the positive seated-flexion side. 4. Letters = direction: same letters (L-on-L) = stuck FORWARD/flexed. Different (L-on-R) = stuck BACKWARD/extended. Both are dysfunctions. 5. Spring confirms: springy = still can go forward (FORWARD). Hard wall = jammed back (BACKWARD). Sphinx: forward eases, backward worsens. 6. Corners = the shape: opposite corners = torsion. Same side = unilateral. Symmetric = bilateral (false-negative seated flexion). 7. L5 follows Fryette: L5 rotates OPPOSITE the sacrum, sidebends TOWARD the axis. Forward = Type I (NR, opposite). Backward = Type II (FRS or ERS, same). 8. Treat it: Axis side DOWN, always. Forward = face down, push ankles. Backward = face up, push knee. References: Greenman's Principles of Manual Medicine; Nicholas & Nicholas Atlas of Osteopathic Techniques; Savarese OMT Review; DiGiovanna/Schiowitz/Dowling An Osteopathic Approach to Diagnosis and Treatment; Chila (ed) Osteopathic Medicine. [NOTE: page has an Elite paywall after the free content for: live Axis Visualizer, all 8 dysfunction detail cards beyond summary, real case walkthroughs, treatment technique detail confirmation, and 25 saved-progress clinical vignettes. The core rules/model above were captured as they render in the free DOM.] 58 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Innominate Rotations INNOMINATE ROTATIONS — THE PELVIS IS A SEESAW; THE HIP IS THE FULCRUM. Opener case: 32M runner, chronic LBP worse right. Standing flexion positive RIGHT. Right ASIS inferior, right PSIS superior vs left. Diagnosis = Right anterior innominate rotation. Two-step system: Step 1 — standing flexion test tells WHICH SIDE (positive right → right innominate). Step 2 — ASIS/PSIS tell DIRECTION (ASIS inferior + PSIS superior = seesaw tipped forward = anterior rotation). THE MODEL: Innominate = flat bone pivoting around hip joint (acetabulum = pivot point). ASIS = front handle of seesaw. PSIS = back handle. One goes up, other goes down. Neutral: ASIS and PSIS level. Anterior rotation: ASIS inferior, PSIS superior, leg appears LONGER (bone tips forward, pushes acetabulum down). Posterior rotation: ASIS superior, PSIS inferior, leg appears SHORTER (bone tips backward, pulls acetabulum up). Anterior Innominate Rotation — ASIS inferior, PSIS superior, leg longer. Bone tips FORWARD (front drops, back rides up); acetabulum pushed down; hip flexors are the culprit. - Landmarks: ASIS inferior (low), PSIS superior (high) on dysfunctional side - Leg Length: appears longer (acetabulum pushed inferiorly) - ROM Restrict: hip EXTENSION restricted (cannot fully extend on that side) - Tissue Texture: tight hip flexors (iliopsoas, rectus femoris); anterior hip fullness - Pubic Bone: pubic tubercle inferior on dysfunctional side - Treatment: hip FLEXION muscle energy — flex hip to barrier, patient pushes into extension, take up slack Posterior Innominate Rotation — ASIS superior, PSIS inferior, leg shorter. Bone tips BACKWARD (front rides up, back drops); acetabulum pulled up; hamstrings/glutes are culprits. - Landmarks: ASIS superior (high), PSIS inferior (low) on dysfunctional side - Leg Length: appears shorter (acetabulum pulled superiorly) - ROM Restrict: hip FLEXION restricted (cannot fully flex on that side) - Tissue Texture: tight hamstrings and glutes; posterior hip fullness/tenderness - Pubic Bone: pubic tubercle superior on dysfunctional side 59 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM - Treatment: hip EXTENSION muscle energy — leg off table in extension, patient pushes into flexion, take up slack THE BOARD TRAP: Standing flex positive RIGHT; "LEFT ASIS is more inferior" stated → if LEFT ASIS inferior, RIGHT ASIS is relatively SUPERIOR by comparison. Test positive RIGHT = right innominate dysfunctional. Right ASIS superior = posterior rotation. Answer: RIGHT posterior innominate rotation. RULE: Always name the dysfunction from the POSITIVE FLEXION TEST SIDE, not from the side described in the landmark finding. Step 1 — Find the Side: Standing Flexion Test = THE SIDE. Positive side = dysfunctional innominate. Technique: patient stands feet shoulder-width, thumbs on inferior PSIS slopes bilaterally, patient bends forward slowly; watch which thumb moves first/travels further superiorly = positive side. Why it works: on forward bend, sacrum should nutate and innominates move symmetrically; a restricted innominate gets "dragged along" with the sacrum instead of moving independently, so that side's PSIS rides higher. Board pearl: STANDING flexion test = innominate dysfunction. SEATED flexion test = sacral dysfunction. Step 2 — Find the Direction: ASIS + PSIS position on the POSITIVE side (Step 1) vs other side. ASIS inferior + PSIS superior = Anterior rotation (bone tipped forward, front swung down/forward, back swung up). ASIS superior + PSIS inferior = Posterior rotation (bone tipped backward, front swung up, back swung down). Memory: "ASIS follows the tilt." Anterior = bone tilts forward, ASIS drops (inferior). Posterior = bone tilts backward, ASIS rises (superior). Seesaw: side that tips down = direction of rotation. Step 3 — Watch the Wording: Board vignettes often describe landmarks from the OPPOSITE (wrong/normal) side to trip you up. E.g., "LEFT ASIS is more inferior compared to right" — check where standing flexion test is positive first. If positive RIGHT, right innominate is dysfunctional; the described left-side finding is just describing the NORMAL side relative to the abnormal side. RULE: Always start with standing flexion test. Positive side IS the dysfunction. ASIS/PSIS positions only tell direction ON THAT SIDE — ignore descriptions of the other side. BOARD TRAP: Standing vs Seated Flexion — standing = innominate; seated = sacrum. If both positive same side, innominate is "dragging" the sacrum along. If not specified but ASIS/PSIS landmarks given → innominate. THE SIDE TRAP (worked scenarios) — Exam finding: "ASIS is more superior on the LEFT." 60 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Scenario A: Standing flexion positive LEFT → LEFT innominate dysfunctional; LEFT ASIS superior → LEFT posterior innominate rotation. (Straightforward — positive side = same side ASIS is high on.) Scenario B (THE TRAP): Standing flexion positive RIGHT → RIGHT innominate dysfunctional. Exam says LEFT ASIS superior, meaning RIGHT ASIS must be relatively inferior. On the positive (right) side, ASIS inferior = RIGHT anterior innominate rotation. THIS is the trap — they described the left side but dysfunction is on the right. GOLDEN RULE: Never name the dysfunction from the described side. Always name it from the standing flexion test side. WORKUP DECISION TREE: (1) Which test names the dysfunctional side? → Standing flexion test (seated flexion moves you into sacral diagnosis instead). (2) Which landmark gives direction? → ASIS: inferior means anterior, superior means posterior. ASIS is "the steering wheel" for innominate rotations. Anterior Rotation → Hip Flexion ME: Patient supine, affected leg flexed at hip/knee to restrictive barrier. Patient action: "push foot down toward table" (hip extension) against resistance, isometric 3-5 sec. Operator: after contraction, take hip further into flexion (take up slack), repeat 3-5x. Why: ASIS is inferior in anterior rotation (bone tipped forward); flexing hip drives ASIS back superiorly, tipping bone posteriorly to correct. Memory: Anterior rotation = hip flexion ME (bone tipped forward, push it backward with flexion). Posterior Rotation → Hip Extension ME: Patient supine, affected leg hanging off table edge in extension; opposite leg flexed at hip/knee, held to chest to stabilize pelvis. Patient action: "push leg up toward ceiling" (hip flexion) against resistance, isometric 3-5 sec. Operator: after contraction, take leg further into extension (take up slack), repeat 3-5x. Why: ASIS is superior in posterior rotation (bone tipped backward); extending hip pulls ASIS inferiorly, tipping bone forward to correct. Memory: Posterior rotation = hip extension ME (bone went backward, pull it forward with extension). MUSCLE ENERGY PRINCIPLES: Direct technique — position patient INTO the restrictive barrier, use their own muscle contraction against operator resistance to engage/release barrier. Isometric contraction: patient pushes against operator, no motion allowed; after 3-5 sec, Golgi tendon organ fires, muscle reflexively relaxes; operator takes up new slack. Reps: 3-5, each time moving further into barrier as muscle releases; endpoint when tissue tension equalizes/movement normalizes. Quick recall: Anterior rotation = hip flexion ME (push ASIS back up). Posterior rotation = hip extension ME (pull ASIS back down). Treatment reverses the seesaw. Anterior Rotation Posterior Rotation Leg Length Appears longer Appears shorter ASIS Inferior (low) Superior (high) PSIS Superior (high) Inferior (low) 61 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Medial Malleolus More inferior (longer) More superior (shorter) Pubic Tubercle Inferior on dysfunctional side Superior on dysfunctional side Ischial Tuberosity Superior on dysfunctional side Inferior on dysfunctional side Short Muscles Rectus femoris, iliopsoas Hamstrings, glutes Anterior Rotation Pattern: ASIS low, PSIS high on affected side; ipsilateral leg appears longer at medial malleolus; pubic tubercle inferior, ischial tuberosity superior on that side; hip flexors (iliopsoas, rectus femoris) hypertonic/shortened. Common in runners, cyclists, people who sit with one leg extended. Posterior Rotation Pattern: ASIS high, PSIS low on affected side; ipsilateral leg appears shorter at medial malleolus; pubic tubercle superior, ischial tuberosity inferior on that side; hamstrings/glutes hypertonic/shortened. Common after heavy hamstring loading (deadlifts, hill running). Leg length clue: medial malleolus moves with rotation — anterior rotation tips bone forward, pushes acetabulum inferiorly → leg appears longer. Posterior rotation tips bone backward, pulls acetabulum superiorly → leg appears shorter. Always compare medial malleoli supine, legs extended. BOARD TRAP: Pubic Tubercle Direction — don't confuse with "pubic shear" (separate dysfunction, see shears page). Anterior rotation: pubic tubercle drops inferior on dysfunctional side, ischial tuberosity rides superior. Posterior rotation: reversed (pubic tubercle superior, ischial tuberosity inferior). Memory: anything IN FRONT of hip axis (ASIS, pubic tubercle) follows ASIS direction; anything BEHIND it (PSIS, ischial tuberosity) follows PSIS (opposite) direction. THE LINEUP (6 entities) 1. Anterior Innominate Rotation: ASIS inferior/PSIS superior/pubic tubercle inferior/ischial tuberosity superior on affected side; leg appears longer; Tx = hip extension, MET or HVLA to close anterior rotation. 2. Posterior Innominate Rotation: ASIS superior/PSIS inferior/pubic tubercle superior/ischial tuberosity inferior on affected side; hamstrings/glutes shortened; leg appears shorter; Tx = hip flexion stretch, MET targeting hamstrings. 3. ASIn Left on Left Oblique Axis: left innominate rotates anterior on left oblique axis (sacral shear variant); axis = left oblique (L5-S1 left ILA pivot); left ASIS inferior, left PSIS superior; sacrum may show anterior sacral base on left; rule = innominate names its own side rotation first; Tx = correct sacral component first, then innominate. 4. PSIn Right on Right Oblique Axis: right innominate rotates posterior on right oblique axis; axis = right oblique (L5-S1 right ILA pivot); right ASIS superior, right PSIS inferior; right leg appears shorter; common cause = heavy hamstring loading on right side; Tx = hip flexion MET, address sacral dysfunction if present. 62 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM 5. ASIS vs PSIS "Seesaw Rule": ASIS and PSIS move in OPPOSITE directions. Anterior rotation: ASIS down, PSIS up, pubic tubercle down, ischial tuberosity up. Posterior rotation: reverse every direction. Memory: front of pelvis (ASIS, pubic) follows same direction; back (PSIS, ischial) flips. 6. Normal Innominate Motion (gait): innominate rotates ANTERIOR during hip extension, POSTERIOR during hip flexion. Gait cycle: heel strike → innominate rotates posterior; toe off → innominate rotates anterior. Axis = transverse axis through pubic symphysis. Clinical pearl: dysfunction = innominate stuck in one position; restricted motion is key finding. Test with ASIS, PSIS, medial malleolus comparison supine. 63 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Innominate Shears & Flares PUBIC VS INNOMINATE SHEARS — ONE CLUE DECIDES IT: DID ONLY THE PUBIC TUBERCLE MOVE, OR DID THE ENTIRE HEMIPELVIS SLIDE WITH ASIS, PSIS, PUBIC RAMUS, AND LEG LENGTH? Opener: 31F runner, LBP+groin pain after fall on left side. Hip painless. Standing flexion + left. Left ASIS, left PSIS, left pubic ramus ALL inferior vs right; left medial malleolus lower. Diagnosis = Left inferior INNOMINATE shear (not pubic shear) — whole side moved together, not just pubic tubercle. THE ONE RULE: Pubic-only = front joint (pubic shear). Whole hemipelvis moved = innominate shear. Key board distinction: In ROTATION, ASIS and PSIS move OPPOSITE directions. In SHEAR, they move TOGETHER (same direction). "If you remember nothing else, remember that." SHEAR (Upslip/Downslip): innominate slides straight UP or DOWN along SI joint; ASIS and PSIS move SAME direction. Superior shear (upslip): whole innominate shifts superior. Both ASIS and PSIS higher on that side; pubic ramus + ischial tuberosity also superior; medial malleolus superior (leg appears SHORTER). Etiology: trauma, classic fall onto one buttock. Inferior shear (downslip): whole innominate shifts inferior. Both landmarks + pubic ramus lower on that side. Leg appears LONGER. Etiology: trauma, less commonly tested. FLARE (Inflare/Outflare): innominate rotates in TRANSVERSE plane, moving ASIS medially or laterally. Inflare: ASIS moves medially (toward midline) — that side narrower ASIS-to-ASIS. Outflare: ASIS moves laterally (away from midline) — that side wider. Memory: INflare = ASIS moves IN. OUTflare = ASIS moves OUT. PUBIC SHEAR: pubic tubercle shifts superior/inferior relative to other side AT THE SYMPHYSIS (front joint). ASIS and PSIS stay LEVEL in isolated pubic shear (this is the differentiator from innominate shear). Superior pubic shear: tubercle higher on affected side. Causes: trauma, tight rectus abdominis, pregnancy-related ligament laxity. Inferior pubic shear: tubercle lower on affected side. Causes: trauma, tight adductors, pregnancy. 64 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Diagnose pubic shears by palpating pubic tubercle height directly, NOT by inferring from innominate rotation. Superior Shear (Upslip) — innominate slides superiorly on sacrum: - ASIS: superior on affected side (whole innominate slid up) - PSIS: superior on affected side (moves with ASIS, bone moved as unit) - Pubic ramus: superior on affected side - Ischial tuberosity: superior on affected side - Medial malleolus: superior (shorter leg) — acetabulum moved up, pulling femoral head superiorly - Standing flex/ASIS compression: positive on affected side - Etiology: trauma (fall on one buttock) — force drives innominate superiorly along SI joint - MET: supine; abduct affected leg 10-15°, internally rotate. Patient lifts hip against equal resistance 3-5 sec, relax, re-engage, repeat 3-5x. - HVLA option: supine; apply long-axis traction on affected leg while patient coughs (sudden cough adds momentum to traction). Signature: ASIS AND PSIS both go UP together (vs anterior rotation where ASIS down/PSIS up). Inferior Shear (Downslip) — innominate slides inferiorly on sacrum: - ASIS: inferior on affected side - PSIS: inferior on affected side (moves with ASIS as unit) - Pubic ramus: inferior on affected side - Standing flex/ASIS compression: positive on affected side - Etiology: trauma - MET: prone with affected hip OFF side of table. Flex and abduct hip; hand on ipsilateral ischial tuberosity, apply superior + lateral force. Patient inhales, tries to straighten leg against resistance, then exhales/relaxes. Re-engage, repeat. Less commonly tested than superior shear. Treatment = prone MET with hip off table, NOT traction. BOARD TRAP: Don't confuse Superior Shear with Posterior Rotation. Posterior rotation: ASIS superior, PSIS INFERIOR (opposite). Superior shear: BOTH superior (same). Check both landmarks — same direction = shear, opposite = rotation. INFLARE/OUTFLARE detail: diagnosed by comparing ASIS-to-umbilicus distance each side. Inflare: ASIS moves medially, ASIS-to-umbilicus distance shorter on that side. Standing flex/ASIS compression positive on affected side. 65 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM MET for inflare: Supine, physician same side. Flex hip/knee, ipsilateral ankle across opposite knee (figure-4). Stabilize contralateral ASIS. Abduct + externally rotate hip to engage barrier. Patient adducts + internally rotates against equal resistance 3-5 sec, relax 1-2 sec, re-engage, repeat 3-5x. Outflare: ASIS moves laterally, ASIS-to-umbilicus distance longer on that side. MET for outflare: Supine, physician same side. Flex hip/knee, ankle across opposite knee (figure-4). Hook fingers medial to ipsilateral PSIS, further flex knee. Adduct + internally rotate hip to engage barrier. Patient abducts + externally rotates against equal resistance 3-5 sec, relax, re-engage, repeat 3-5x. Superior Pubic Shear MET: supine, knees flexed 90°. Step 1 (knees closed): patient abducts knees against resistance 3-5 sec, relax. Step 2 (knees open): patient adducts knees against resistance 3-5 sec, relax; gradually open knees wider each rep. Reassess after 3-5 cycles. Inferior Pubic Shear MET: supine; one hand stabilizes ipsilateral ASIS. Flex + abduct hip; other hand on ipsilateral ischial tuberosity. Posteriorly rotate hip with superior + medial force while maintaining contact on ASIS/ischial tuberosity/knee. Patient straightens leg against equal resistance, then relaxes; re-engage, repeat. BOARD TRAP: don't swap the two pubic shear protocols (superior = adductor/abductor knee sequence; inferior = hip flexion/abduction + ischial tuberosity contact + leg straightening against resistance). Pubic shear: pubic tubercle ONLY moves; ASIS and PSIS remain level. Name by affected pubic tubercle side + direction. Innominate shear: ASIS, PSIS, pubic ramus, ischial tuberosity, leg length ALL move together. Name by affected innominate side + vertical direction. Rotation trap: ASIS and PSIS move OPPOSITE directions = rotation (not shear). Test-day rule: pubic ramus alone up/down = pubic shear. ASIS+PSIS also up/down with it = innominate shear. DIAGNOSTIC DECISION TREE (full sequence) 1. Standing flexion test positive? NO → consider sacral dysfunction (seated flexion) or no SI dysfunction, STOP. YES on one side → innominate dysfunction that side, proceed. 2. Compare ASIS/PSIS: OPPOSITE directions → ROTATION. SAME direction → SHEAR. 3a. If ROTATION: ASIS inferior on affected side? YES (ASIS inferior/PSIS superior) → ANTERIOR ROTATION. NO (ASIS superior/PSIS inferior) → POSTERIOR ROTATION. 3b. If SHEAR: both landmarks superior? → SUPERIOR SHEAR (upslip, leg shorter, treat with traction). Both inferior? → INFERIOR SHEAR (downslip, leg longer). 66 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM 4. ASIS shifted medially/laterally (ASIS-to-umbilicus distance)? Closer to midline → INFLARE. Farther → OUTFLARE. 5. Palpate pubic tubercles for height asymmetry: higher on affected side → SUPERIOR PUBIC SHEAR. Lower → INFERIOR PUBIC SHEAR. Order matters: standing flexion (which side) → ASIS/PSIS comparison (rotation vs shear) → ASIS medial/lateral (flare) → pubic symphysis (pubic shear). Anterior Innominate Rotation: ASIS inferior/anterior, PSIS superior/posterior, pubic ramus inferior (affected side). Opposite directions = rotation. Rx: MET supine, hip off table (hip extension barrier). Tight hip flexors pull innominate into anterior rotation. Posterior Innominate Rotation: ASIS superior/posterior, PSIS inferior/anterior, pubic ramus superior. Opposite directions = rotation. Rx: MET prone, leg hanging off table (hip flexion barrier). Superior Innominate Shear (Upslip): ASIS superior, PSIS also superior (same direction), pubic ramus + ischial tuberosity superior, leg shorter (medial malleolus superior). Mechanism: fall onto buttock. Rx: MET supine with long-axis leg traction. Inferior Innominate Shear (Downslip): ASIS inferior, PSIS also inferior, pubic ramus inferior, leg longer. Rx: MET prone, hip off table, superior+lateral force on ischial tuberosity. Innominate Outflare: ASIS moves laterally, ASIS-to-umbilicus distance longer, pelvic diameter widens. Rx: MET supine, abduct+externally rotate hip to barrier, patient adducts+internally rotates against resistance. Innominate Inflare: ASIS moves medially, distance shorter, pelvic diameter narrows. Rx: MET supine, internally rotate+adduct hip to barrier, patient abducts+externally rotates against resistance. Superior shear (upslip): MET prone, affected leg hanging off table edge, steady caudal traction to mobilize ilium inferiorly, hold while patient gently contracts against resistance. Reassess ASIS/PSIS/pubic ramus symmetry. Inferior shear (downslip): MET supine, steady cephalad (upward) traction on affected leg while patient gently resists, goal mobilize ilium superiorly back onto sacrum. Reassess. Flare-out (ASIS wider, externally rotated ilium): Direct MET compressing ASIS medially — hands on both ASIS, patient resists as medial pressure applied. Alt: HVLA thrust medially on flared ASIS. Goal: internally rotate ilium to neutral. Reassess ASIS-to-umbilicus distance + pubic ramus symmetry. Flare-in (ASIS narrower, internally rotated ilium): Direct MET pushing ASIS laterally — lateral pressure on ASIS while patient resists. Goal: externally rotate ilium to neutral. Reassess. After every treatment: recheck ASIS symmetry, PSIS symmetry, pubic ramus height, spring test. 67 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM KEY VIGNETTE TEACHING POINTS - Fall on porch step, groin+LBP, standing flex+ left, left ASIS/PSIS/pubic ramus ALL inferior, left medial malleolus lower → Left inferior innominate shear (NOT pubic shear — because ASIS and PSIS moved too, not just pubic ramus). - Pregnant woman, anterior pelvic pain after lifting basket, standing flex+ right, right pubic tubercle inferior, but ASIS/PSIS/malleoli ALL symmetric → Right inferior pubic shear (isolated pubic finding = pubic shear, not innominate shear). - Fall onto right ischial tuberosity, standing flex+ right, right ASIS/PSIS/pubic ramus/ischial tuberosity ALL superior, right leg shorter → this pattern rules OUT superior pubic shear (because ASIS/PSIS also moved — it's actually a superior innominate shear); the giveaway is that ASIS and PSIS are also superior. - Dancer, pelvic pain, standing flex+ left, left pubic tubercle superior, ASIS/PSIS heights EQUAL → additional finding that would push toward innominate shear = left ASIS AND PSIS both superior with a shorter left leg (i.e., if those also move, it's no longer isolated pubic shear). - Stepped in pothole, standing flex+ right, right ASIS inferior, right PSIS superior, pubic tubercles LEVEL → this is NOT a shear because ASIS and PSIS are moving in OPPOSITE directions (defines rotation, not shear) — it's an anterior innominate rotation. - Right inflare ME treatment ("push knees outward against my hands") — biomechanical explanation: pushing outward (abduction) drives the innominate laterally, moving the ASIS away from midline, correcting the inflare. - Fall onto left buttock (snowboarding), left ASIS+PSIS both 1.5cm superior to right, left leg 1cm shorter, standing flex+ left, SEATED flexion test NEGATIVE bilaterally → the negative seated flexion test bilaterally already rules OUT concurrent sacral dysfunction (seated flexion tests the sacrum; if negative, no sacral component). - Prior left hip surgery, left groin pain, standing flex+ left, left ASIS closer to umbilicus (inflare), ASIS/PSIS heights equal → most appropriate treatment = supine, patient pushes both knees together (adducts) against physician resistance is INCORRECT per this vignette's key... [note: page presents this as a quiz question; based on the inflare protocol above, treatment should engage abduction/external rotation barrier with patient adducting/internally rotating against resistance — matches "patient pushes knees together (adducts)" as the resisted action in the figure-4 inflare setup]. 68 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Posterior Innominate Rotation & Hamstring Dysfunction OMM · PELVIS (DETAIL) Posterior Innominate Rotation and Hamstring Dysfunction Complements files 07_innominate-rotations.txt and 08_innominate-shears-flares.txt — this page reinforces the rotation-vs-shear distinction with a dedicated hamstring/direct-MET focus. READ ASIS + PSIS AS A PAIRED COMPASS: opposite landmark directions = ROTATION; landmarks moving TOGETHER = SHEAR. - Posterior innominate rotation: ASIS SUPERIOR + PSIS INFERIOR (on the dysfunctional side). - Anterior innominate rotation: reverses the pattern — ASIS INFERIOR + PSIS SUPERIOR. - Superior innominate shear: BOTH landmarks superior (moving together, NOT opposite) — this is translation, not rotation. BOARD TRAP: don't automatically label a high ASIS as "posterior rotation" — you must check the PSIS too. If both landmarks move the SAME direction, it's a SHEAR, not a rotation (a common trap for learners who only look at the ASIS). DIAGNOSTIC SEQUENCE: (1) Standing flexion test identifies the DYSFUNCTIONAL SIDE (not the diagnosis itself — laterality only). (2) Landmark comparison (ASIS/PSIS together) then names the DIRECTION of rotation or translation. (3) Hip extension restriction SUPPORTS a posteriorly-rotated pattern but does NOT replace the landmark exam — motion restriction is supportive evidence, not a standalone diagnostic criterion. WORKED EXAMPLE: runner, unilateral low back/posterior pelvic tightness, no trauma/fever/neuro deficit, positive standing flexion test on the RIGHT, right ASIS superior + right PSIS inferior, hypertonic right hamstrings, restricted hip extension → Right posterior innominate rotation (ASIS up + PSIS down = posterior rotation on the side of the positive standing flexion test; not anterior rotation [reversed pattern], not superior shear [would require both landmarks moving the same direction], not sacral torsion [no sacral finding described]). HAMSTRINGS IN THE MECHANICAL CHAIN: hamstrings arise PRIMARILY from the ischial tuberosity and contribute to hip extension. Hypertonicity can REINFORCE posterior-chain tension and complicate motion testing — but muscle tenderness/tightness ALONE does NOT prove an innominate diagnosis (it's a mechanical contributor, not a standalone pelvic diagnosis). Because hamstrings support hip extension, their pull can reinforce (not cause) a posterior innominate rotation pattern; they do NOT attach to the ASIS directly. DIRECT MUSCLE-ENERGY PROTOCOL for posterior innominate rotation (engaging the anterior-rotation barrier via hip extension): 69 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM 1. Position patient supine with the involved leg extending OFF the table (lets gravity/positioning carry the hip toward extension). 2. Carry the hip into extension until the anterior-rotation barrier is engaged comfortably. 3. Ask for gentle hip flexion against resistance (isometric effort toward ease — standard direct-MET logic: clinician holds the barrier, patient's effort goes the opposite/ease direction). 4. Relax, advance to new barrier, repeat, reassess. Logic: the missing motion in posterior rotation is ANTERIOR rotation, which is expressed clinically as limited hip EXTENSION — so the direct barrier is engaged via hip extension, and the patient's gentle contraction (hip flexion) pulls toward ease. REASSESSMENT: must recheck the SAME findings that established the original diagnosis — standing flexion test laterality, ASIS height, PSIS height, AND hip extension motion (not just pain score alone, not just hamstring strength alone, not just lumbar rotation without pelvic landmarks, not just one landmark). Symptom improvement (e.g., "less posterior tightness") does not, by itself, confirm the innominate dysfunction resolved. RED FLAGS: trauma or instability require evaluation BEFORE OMT. High-energy pelvic injury + severe groin pain + inability to bear weight + visible pelvic asymmetry → STOP provocative manual treatment and evaluate the traumatic pelvic red flag urgently — a positive motion test does NOT clear fracture, and a pelvic osteopathic diagnosis NEVER outranks a traumatic instability screen. QUIZ / VIGNETTE HIGHLIGHTS - Both right ASIS AND right PSIS superior to the left, positive right standing flexion test, learner calls it "posterior rotation" based on the high ASIS alone (ignoring PSIS direction) → correct diagnosis = Right superior innominate shear (both landmarks moving the SAME/superior direction = shear, not rotation; rotation requires OPPOSITE landmark directions — the learner's error is exactly the "high ASIS = automatic posterior rotation" trap). - Confirmed right posterior innominate rotation (ASIS superior, PSIS inferior, positive right standing flexion, restricted right hip extension), cooperative patient, no red flags, clinician chooses direct MET → correct setup = supine with right leg off the table, extend the right hip to the barrier, then ask patient to gently flex the hip against resistance (not flex fully then ask to extend [reversed logic], not a prone superior translation, not neutral hip + resisted knee extension, not an unparticipatory HVLA thrust). - Posterior pelvic tightness + marked hamstring hypertonicity/tenderness near ischial tuberosity + ipsilateral ASIS superior/PSIS inferior; learner claims hamstrings "cannot affect innominate position" since they don't attach to the ASIS → correct explanation = hamstrings arise from the ischial tuberosity and their hip-extension pull CAN REINFORCE posterior innominate rotation (not "insert on ASIS directly," not "hamstrings are primary hip flexors causing anterior rotation" [wrong action — hamstrings extend the hip], not "proves a superior shear," not "no pelvic attachment"). 70 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM - After 3 MET cycles for right posterior innominate rotation, patient reports less posterior tightness, learner wants to document "corrected" immediately → must reassess: standing flexion laterality, ASIS height, PSIS height, AND hip extension motion (the SAME landmarks/tests that made the original diagnosis) — not pain score alone, not hamstring strength alone, not lumbar rotation without pelvic landmarks, not just one landmark. - High-energy pelvic injury, severe groin pain, inability to bear weight, visible pelvic asymmetry, learner obtains an abnormal standing flexion test and proposes MET for posterior innominate rotation, patient cannot participate comfortably → best next step = STOP provocative manual treatment, evaluate the traumatic pelvic red flag urgently (not proceed because "MET is always safe," not increase contraction force to overcome pain, not treat hamstrings first and defer imaging, not assume the asymmetry is benign rotation). MEMORY HOOKS - "Opposite = rotation, together = shear" — the single rule for reading ASIS/PSIS pairs. - Standing flexion test = SIDE only; landmark comparison = DIRECTION; motion restriction = SUPPORTIVE evidence only — three separate pieces of information, don't collapse them into one test. - Hamstrings REINFORCE posterior rotation via ischial-tuberosity hip-extension pull; they don't directly move the ASIS and their tenderness alone never substitutes for the landmark exam. - Direct MET for posterior rotation: engage extension (the barrier/missing anterior-rotation motion), patient gently flexes (toward ease) against resistance. - Reassessment must recheck ALL the original diagnostic criteria (test + both landmarks + motion), not just symptom relief. - Trauma/instability always screened BEFORE OMT — a pelvic diagnosis never outranks a traumatic instability workup. 71 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM Pregnancy Biomechanics & Lumbar Lordosis OMM · SPECIAL POPULATIONS Pregnancy Biomechanics and Lumbar Lordosis CORE MECHANISM: Anterior abdominal growth + weight gain shift the center of mass FORWARD. Compensatory adaptations: increased lumbar lordosis and anterior pelvic tilt (to keep trunk balanced over pelvis), altered/widened gait, and increased muscle-endurance demand (paraspinal, abdominal, pelvic muscles working within a changing lever system). KEY POINT: the visible lordosis/postural change does NOT by itself prove or measure the pain source — pain is MULTIFACTORIAL (ligamentous laxity, muscle endurance, prior pain history, pelvic girdle mechanics, activity level, sleep, psychosocial factors all contribute). The same degree of lordosis can be painless in one patient and coexist with pain in another — never use visual lordosis estimate as a severity/diagnostic scale or to predict pain intensity or obstetric outcome. PAIN LOCALIZATION — LUMBAR LOW BACK PAIN vs PELVIC GIRDLE PAIN (key discriminator) - Lumbar low-back pain: centered ABOVE the lumbosacral junction; linked to spinal movement, endurance, or paraspinal loading. - Pelvic girdle pain: near the posterior pelvis / sacroiliac region / buttock / symphyseal area; worsens with rolling in bed, stairs, single-leg loading, transfers. These can COEXIST — examination should map pain location and provoked function rather than forcing one category. FOLLOW-UP / MONITORING measures (function over curvature): walking tolerance, transfers, sleep disruption, stairs, single-leg tasks, pain location, neurologic findings, response to position changes. Improvement can be documented via activity modification, exercise, support, or gentle position-adapted care WITHOUT claiming a structural curve was "permanently corrected." SAFE POSITIONING / EXERCISE PRINCIPLES: ACOG supports physical activity in uncomplicated pregnancy when no contraindication is present and the program is adapted to the patient (NOT blanket restriction, NOT "only prolonged supine exercise allowed," NOT ignoring symptoms at pre-pregnancy intensity). AFTER ~20 WEEKS: avoid prolonged supine exercise/positioning — gravid uterus can compress major vessels (aortocaval compression) and reduce venous return. Use side-lying, seated, standing, or supported positions instead for exam, exercise, or gentle manual care to reduce aortocaval compression and improve comfort. Dizziness/lightheadedness/nausea while supine after ~20 weeks → reposition (turn to side) PROMPTLY and assess for aortocaval compression; do not "wait for adaptation" or continue the supine position. 72 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM RED FLAGS THAT OVERRIDE THE MECHANICAL/BIOMECHANICAL LABEL (mnemonic-style toggle from the page — "PVFPSP" style categories): - Progressive neurologic weakness or bowel/bladder dysfunction → urgent neurologic assessment (cauda equina concern — pregnancy does NOT make these findings normal/expected). - Vaginal bleeding, contractions, or hemodynamic symptoms → urgent obstetric evaluation. - Fever, trauma, or severe progressive pain → medical evaluation (infection/trauma workup). - Pain that improves with safe position and graded activity → supports a modifiable mechanical contributor (reassuring). - Stable, localized pain with normal neurologic exam → lowers immediate red-flag concern. Gentle manual/exercise care may complement an appropriate mechanical presentation but does NOT replace obstetric or medical assessment when red flags are present. QUIZ / VIGNETTE HIGHLIGHTS - 28wk, gradual low-back fatigue after standing, forward-shifted COM, increased lordosis, mild anterior pelvic tilt, no red flags → correct explanation: anterior abdominal growth shifts COM forward, and lordosis + pelvic tilt MAY compensate to preserve balance (not "pregnancy always flattens lordosis," not "the curve proves structural injury," not "ligamentous change is the only contributor," not "complete activity restriction required"). - Right posterior pelvic pain worsened by rolling/stairs/single-leg stance, no red flags → Posterior Pelvic Girdle Pain (not isolated lumbar pain, and definitely not cavernous sinus syndrome / femoral neuropathy / De Quervain — those are distractor red herrings testing whether you stay anchored to the actual pattern). - 24wk, lightheaded/nauseated during prolonged supine exercise, resolves on turning to side, no bleeding/chest pain/neuro deficit → Aortocaval compression reducing venous return; STOP the supine activity and reposition immediately (not "continue exercising," not "remain supine until adaptation," not blaming lordosis alone). - Back pain + new progressive leg weakness + saddle sensory change + difficulty controlling urination, patient wants stretching/manual treatment first → cauda equina red flags: arrange URGENT medical + obstetric evaluation immediately — do NOT begin myofascial release, do NOT attribute to normal ligamentous laxity, do NOT wait for the next routine prenatal visit. Pregnancy does not normalize cauda equina findings. - 30wk, uncomplicated pregnancy, low-back discomfort, asks if all activity should stop, no obstetric contraindication → physical activity CAN be appropriate in uncomplicated pregnancy when adapted to the patient and obstetric guidance (not blanket restriction, not "only supine exercise allowed after 20wk" — note that's actually backwards, supine should be AVOIDED after 20wk). 73 OMM / OMT BOARD REVIEW PART 3 — PELVIS & SACRUM - Patient A: more lordosis, no pain. Patient B: modest postural change but significant pelvic girdle pain (prior episodes in earlier pregnancy). Learner claims lordosis amount alone determines who hurts → CORRECTED: lordosis is one compensation among many; pain also reflects pelvic mechanics, muscle endurance, prior pain history, gait, and other individual factors — amount of lordosis does NOT dictate who develops pain. MEMORY HOOKS - "Curve ≠ Cause": visible lordosis is a compensation, not a pain measurement or severity scale. - 20-week rule: after ~20 weeks, avoid prolonged SUPINE positioning — think aortocaval compression; use side-lying/seated/standing alternatives. - Pain location sorts the syndrome: ABOVE lumbosacral junction = lumbar; posterior pelvis/SI/symphysis + transfer-provoked = pelvic girdle pain; they can coexist. - Red flags (neuro deficit + bowel/bladder change = cauda equina; bleeding/contractions = obstetric; fever/trauma = medical) always override the biomechanical/postural explanation — pregnancy doesn't make these normal. 74 PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES PART 4 COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES IN THIS PART Counterstrain: Pelvis & Lumbar Tender Points Psoas Syndrome & the Opposite-Motion Rule Psoas Syndrome & Iliopsoas Dysfunction (Red Flags/MET Detail) Piriformis Syndrome Soft Tissue Techniques Myofascial Release & the Muscle Stretch Reflex Fascial Subtypes 75 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Counterstrain: Pelvis & Lumbar Tender Points COUNTERSTRAIN: PELVIS & LUMBAR — FIND THE TENDER POINT. SHORTEN THE MUSCLE. HOLD 90 SECONDS. RESET THE SPINDLE. Opener: 35F chronic LBP → right buttock. Tender point between lateral edge of sacrum and greater trochanter (right). Tenderness decreases prone, operator sits on right side, flex right hip/knee off table, abduct hip away from table, externally rotate. Muscle = Piriformis (posterior pelvic tender point). Contrast: psoas tender point = anterior abdomen, treated supine. Iliacus = anterior medial to ASIS, supine. Glute medius = more lateral, near TFL. COUNTERSTRAIN BASICS — Six Steps: 1. Identify tender point using a few ounces of pressure. 2. Establish 1-10 tenderness scale. 3. Place patient in position of ease until tenderness drops ≥70%. 4. Hold position 90 seconds. 5. Slowly return patient to neutral. 6. Reassess: no more than 30% residual tenderness should remain. Treat most painful tender point first. Anterior tender points: flexion-related, treated with FLEXION as primary motion (curl patient toward front to shorten anterior tissue), patient SUPINE. Fine-tune with sidebend (ankles) and rotation (knees) while hips/knees flexed. Posterior tender points: extension-related, treated with EXTENSION, patient PRONE. For posterior lumbar points (PL1-PL5): extend ipsilateral hip + sidebend/rotate AWAY from point by adducting ipsilateral leg. Some posterior pelvic points blend extension with abduction/adduction and ER/IR. Why 90 seconds: resets the muscle spindle (was firing inappropriate stretch signals from shortened/dysfunctional muscle — pain-spasm cycle: tender point fires pain → muscle guards/contracts → contraction perpetuates spindle dysfunction → self-sustaining until passive positioning interrupts it). Holding position of ease 90 sec lets spindle recalibrate resting length. SLOW return to neutral is critical — fast return reactivates spindle and undoes treatment. 76 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES MASTER RULE: Anterior = flexion-related = supine. Posterior = extension-related = prone. Lateral = sidebending/rotation component added within those buckets. A1 Psoas (major hip flexor): Location = 2/3 way from ASIS to midline (lateral edge of rectus abdominis, lower abdomen). Tx: Supine, flex both hips, sidebend TOWARD tender point, externally rotate hips (whole body curls toward/around point). Mnemonic: Psoas = hip flexor = flex hips, fold toward point, ER. A2 Iliacus (deep hip flexor, iliac fossa): Location = 1/3 way from ASIS to midline (more medial than psoas, deeper in iliac fossa). Tx: Supine, operator same side, flex hip + externally rotate (figure-4/Patrick-style). Mnemonic: Iliacus = inside iliac fossa = closer to midline than psoas; flex + ER. A3 Low Ilium (Psoas Minor): Location = anterior-superior pubic ramus, ~2 inches lateral to pubic symphysis at iliopubic eminence. Tx: Supine, operator same side, HYPERFLEX ipsilateral hip (knee toward chest maximally). Mnemonic: on pubic ramus, lateral to symphysis; treat with hyperflex. A4 Inguinal (Pectineus, hip adductor/flexor): Location = superior pubis near medial end of inguinal ligament. Tx: Supine, operator same side, flex hip/knee ~90°, then ADDUCT and internally rotate. Adduction matches pectineus action. BOARD TRAP: most-missed anterior pelvic point — uses ADDuction + IR (do NOT confuse with FADIR provocative test which uses ABduction). A5 Low Ilium Flare-out (inferior pubic ramus/adductor origin): Location = inferior-medial aspect of descending pubic ramus. Tx: Supine, operator same side, HYPERFLEX affected hip, then abduct + externally rotate. Hyperflexion differentiates from iliacus. ANTERIOR LUMBAR POINTS (AL1-AL5) — all supine, hips/knees flexed; sidebend via ankles, rotation via knees: AL1 (Internal Oblique): location just medial to ASIS. Tx: F STRA = Flex, Sidebend TOWARD, Rotate AWAY. (The loner/exception.) AL2 (External Oblique): just medial to AIIS. Tx: F SART = Flex, Sidebend AWAY, Rotate TOWARD. AL3 (Iliopsoas): just lateral to AIIS. Tx: F SART (same as AL2). AL4 (Iliopsoas): just inferior to AIIS. Tx: F SART (same). AL5 (Rectus Abdominis): on pubic tubercle, ~1cm lateral to symphysis on superior pubic ramus. Tx: F SARA = Flex, Sidebend AWAY, Rotate AWAY (the "all away" point). AL Mnemonic: AL1 = STRA (toward/away). AL2-AL4 = SART (away/toward). AL5 = SARA (away/away). Flexion constant across all five. P1 Piriformis (deep hip ER): Location = between lateral edge of sacrum and greater trochanter. Tx: Prone, operator sits SAME side, flex hip/knee OFF table, abduct hip away from table, externally rotate. Mnemonic: mimics piriformis action (deep ER): flex, abduct off table, ER. 77 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES P2 Upper Pole L5 (UPL5, lumbosacral paraspinals): Location = superomedial aspect of PSIS (just above/slightly medial to PSIS). Tx: Prone, operator stands OPPOSITE side, EXTEND ipsilateral hip, fine-tune with adduction/rotation until ≥70% tenderness drop. Mnemonic: UP and medial on PSIS; treat from opposite side, extend hip. P3 Midpole Sacral (piriformis attachment on sacrum): Location = midway down sacrum at piriformis attachment. Tx: Prone, operator same side, abduct + externally rotate ipsilateral hip. P4 Lower Pole L5 (LPL5, lumbosacral paraspinals): Location = just inferior to PSIS (bottom edge). Tx: Prone, operator same side, flex hip/knee OFF table ~90°, then ADDUCT hip, fine-tune with internal rotation. Key contrast: UPL5 = extend from contralateral side; LPL5 = flex off table + ADDuct + IR from same side — both at PSIS but opposite shape. BOARD TRAP: LPL5 uses ADDuction (not abduction) — "Lower Pole = Lower on PSIS, flex off table, ADDuct (cross midline), IR." P5 Gluteus Medius (Lateral PL3/PL4, hip abductor/lateral stabilizer): Location: Lateral PL3 = ~2/3 distance from PSIS toward TFL; Lateral PL4 = posterior margin of TFL. Tx: Prone, operator same side, extend ipsilateral hip, then abduct + externally rotate. P6 High Ilium Flare-Out (HIFO, lower lateral sacrum): Location = lower lateral border of sacrum/coccyx. Tx: Prone, extend ipsilateral leg, then adduct + externally rotate. P7 High Ilium Sacroiliac (HISO, posterior SI region): Location = ~3cm lateral to PSIS. Tx: Prone, operator same side, extend, abduct, externally rotate ipsilateral hip. P8 Posteromedial Trochanteric (deep gluteal): Location = ~3 inches inferior to greater trochanter, medial to ischial tuberosity. Tx: Prone, operator OPPOSITE side, extend, adduct, externally rotate ipsilateral hip. POSTERIOR LUMBAR POINTS (PL1-PL5 and QL) — most prone, extend ipsilateral hip + sidebend/rotate AWAY (adduct leg): PL1-PL5 Spinous Process (lumbar paraspinals at SP): Location = inferolateral aspect of L1-L5 spinous process. Tx: Prone, E SARA = Extend ipsilateral hip, sidebend AWAY, rotate AWAY (via adducting ipsilateral leg). Mnemonic: All PL points = E SARA. Extension constant, both sidebend/rotate away. PL1-PL5 Transverse Process (at TP): Location = lateral aspect of L1-L5 TP. Tx: same E SARA as spinous points. QL (Quadratus Lumborum, hip hiker): Location = between inferior 12th rib and superior iliac crest. Tx: Prone, extend ipsilateral hip, then ABDUCT + externally rotate (QL BREAKS the PL E SARA pattern — outlier). Anterior (front of body = supine + flexion): Psoas (supine, flex hips; SB toward, ER) / Iliacus (supine, flex hip; ER) / Low Ilium-psoas minor (supine, hyperflex hip; max flexion) / Inguinal-pectineus (supine, flex hip/knee 90°; ADDuct+IR) / Low Ilium Flare-out (supine, hyperflex hip; abduct+ER) / AL1 (supine, hips/knees flexed; F STRA: SB toward, Rot away) / AL2-AL4 (F SART: SB away, Rot toward) / AL5 (F SARA: SB away, Rot away). 78 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Posterior (back of body = prone + extension, with exceptions): Piriformis (prone, operator same side; flex off table, abduct, ER) / UPL5 (prone, operator opposite side; extend hip + adduction/rotation) / Midpole sacral (prone, operator same side; abduct+ER) / LPL5 (prone, operator same side; flex off table, ADDuct, IR) / Glute medius (prone, operator same side; extend, abduct, ER) / HIFO (prone; extend, adduct, ER) / HISO (prone, operator same side; extend, abduct, ER) / Posteromedial trochanteric (prone, operator opposite side; extend, adduct, ER) / PL1-PL5 (prone, extend ipsilateral hip; E SARA: SB/Rot away via adduct leg) / QL (prone, extend ipsilateral hip; abduct+ER). Note: Posterior pelvic exceptions (piriformis, midpole sacral, LPL5) flex the hip OFF the table because muscle attachments differ from the extension-default pattern. AL vs PL LUMBAR RECIPE: Anterior Lumbar = supine + flex. AL1 (medial to ASIS) = F STRA. AL2 (medial to AIIS) = F SART. AL3 (lateral to AIIS) = F SART. AL4 (inferior to AIIS) = F SART. AL5 (pubic tubercle) = F SARA. AL1 and AL5 are exceptions to the SART middle. Posterior Lumbar = prone + extend. PL1-PL5 spinous = E SARA. PL1-PL5 transverse = E SARA. QL (rib 12 to iliac crest) = extend, abduct, ER (the outlier). Direction rule: anterior (flexion-related) points generally sidebend/rotate TOWARD the point to shorten anterior tissue. Posterior lumbar points (PL1-PL5) use E SARA: sidebend/rotate AWAY. Pelvic exceptions follow muscle-specific recipes, not one single rule. CLINICAL CONNECTIONS - Psoas tender point + chronic hip flexor tightness: desk workers develop chronically shortened psoas; spindle adapts, fires inappropriately when loaded. Tender point 2/3 from ASIS to midline. Tx as above; ≥70% reduction confirms diagnosis and locks in the 90-sec hold position. - Piriformis tender point + sciatica-like symptoms: sciatic nerve runs deep to (or through, in variants) piriformis; spasm compresses nerve → buttock pain radiating down leg ("piriformis syndrome"). Differentiator from disc radiculopathy: true L4-S1 radiculopathy has positive SLR with dermatomal distribution; piriformis-related symptoms can have NEGATIVE SLR while reproducing buttock pain on piriformis-loading positions. - UPL5/LPL5 + LBP radiating to buttock: PSIS tender points point to L5 somatic dysfunction; both can mimic SI joint complaints. Differentiator: UPL5 responds to prone extension of ipsilateral hip FROM CONTRALATERAL side; LPL5 responds to flexing hip off table from SAME side, then adducting + internally rotating. Two PSIS points, opposite recipes — use whichever position drops tenderness ≥70%. - Tender points serve BOTH diagnosis and treatment: the position of ease that drops tenderness ≥70% IS both the diagnostic confirmation and the treatment position. 79 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Psoas Syndrome & the Opposite-Motion Rule OMM · MYOFASCIAL Psoas Syndrome and the Opposite-Motion Rule THE ONE RULE (unlocks a whole category of board questions): a muscle stuck contracted holds the joint in the direction IT acts, so it restricts the OPPOSITE motion. "Name the muscle, name its action, flip it." A tight muscle is a rope pulled taut on one side of a joint — the joint sits where the rope drags it and cannot travel the way the rope refuses to lengthen. WORKED EXAMPLE: hypertonic psoas (hip flexor) → holds hip FLEXED → restricted motion = hip EXTENSION (its antagonist motion, the one requiring the muscle to lengthen). Flexion itself stays free/feels strong since that's the direction already being pulled; abduction/internal rotation are governed by OTHER muscles entirely, so they're unaffected. PSOAS ANATOMY (predicts the deficit without memorization) - Origin: lumbar spine, bodies + transverse processes of T12 through L5 (hugs the front of vertebrae). - Insertion: dives through pelvis to the LESSER TROCHANTER of the femur. - Nerve: direct L1-L3 branches; the LUMBAR PLEXUS forms INSIDE the psoas, explaining groin/thigh symptoms from psoas spasm. - Action: spans spine to femur IN FRONT of the hip axis → chief hip flexor (also flexes lumbar spine forward). - Stuck-on effect: shortens, tugs upper lumbar spine, holds hip flexed → extension cannot happen; a stubborn L1 or L2 somatic dysfunction often accompanies it. Rule of thumb: anything crossing IN FRONT of a joint and pulling is a FLEXOR — find the insertion relative to the axis, and you have the answer without a chart. LUMBAR PLEXUS BRANCHES (why psoas spasm mimics neural symptoms without a true root deficit) - Iliohypogastric + Ilioinguinal (L1): lower abdomen, inguinal region. - Genitofemoral (L1-L2): groin, upper anterior thigh, genital branch. - Lateral femoral cutaneous (L2-L3): lateral/anterior thigh sensory. - Femoral (L2-L4): anterior thigh, quadriceps, patellar reflex. - Obturator (L2-L4): medial thigh, adductor compartment. Clinical rule: psoas spasm symptoms follow these nerve distributions, so they can mimic neural pathology without an actual nerve root deficit. PSOAS SYNDROME — THE CLINICAL PICTURE 80 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Posture: stands forward-flexed, sidebent TOWARD the tight side, cannot straighten fully. - Pain: deep low back, often radiating to groin/anterior thigh via psoas-adjacent lumbar plexus branches (genitofemoral/ilioinguinal → groin; femoral/lateral femoral cutaneous → anterior thigh). - Trigger: prolonged sitting, a flexion strain, or sustained hip flexion. - Tender point: deep in the lower quadrant, ~2/3 of the way from ASIS to umbilicus. - Partner dysfunction: non-neutral L1 or L2 somatic dysfunction; ipsilateral piriformis often irritated too. - Confirmatory test: positive Thomas test. THOMAS TEST: patient supine, one knee hugged to chest to flatten lumbar lordosis. If the OPPOSITE thigh rises off the table, that hip's flexor is shortened. Mechanism: this is literally the opposite-motion rule measured — flattening the back should let the other leg lie flat via gravity; a shortened psoas refuses to let its hip extend onto the table, so the thigh floats. OMM TREATMENT (Counterstrain) - Psoas tender point (~2/3 from ASIS to umbilicus): patient supine, physician supports thigh/knee, brings the treated hip into MARKED FLEXION, lets trunk sidebend toward the point, tiny external-rotation fine-tune only if it softens the point further. Hold ~90 seconds, then return slowly to neutral. Should feel like EASE, never torque or forced stretch. - Iliacus tender point (medial to ASIS in iliac fossa): supine frog-leg position — physician supports both legs, flexes both hips and knees, lets knees fall outward into external rotation (crosses ankles), shortening iliacus in the iliac fossa. - Then address the partner dysfunction: treat L1/L2 (MET or HVLA as indicated) and recheck the piriformis. Counsel against the sustained-flexion habit that caused it, or it recurs. A retrocecal appendix sits directly on the RIGHT psoas. When inflamed, every stretch of that muscle hurts. Classic bedside PSOAS SIGN: RLQ pain when the clinician passively EXTENDS the right hip (stretches the psoas against the inflamed appendix); resisted right hip flexion can also reproduce the irritation. KEY INSIGHT: the rule still holds — the inflamed psoas ALSO hates the motion that lengthens it (extension), exactly like the mechanically-tight one. The difference is the SOURCE (mechanical muscle problem vs. visceral emergency), not the motion pattern. Imaging note: don't diagnose appendicitis from an image alone in a board stem — the CT report establishes appendicitis; the psoas sign explains WHY hip extension hurts. Disposition = surgical evaluation, NOT psoas counterstrain. Timeline Psoas syndrome (somatic) Psoas sign positive (visceral) Days of mechanical back/groin pain, no fever Hours of RLQ pain, fever, anorexia, nausea 81 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Psoas syndrome (somatic) Psoas sign positive (visceral) Exam Hypertonic ropey tender muscle band, positive Thomas test Pain on passive right hip extension, RLQ guarding, rebound Labs Normal WBC, soft non-tender belly Leukocytosis, imaging shows appendicitis Disposition OMM, stretch, habit change Surgery, NOT the table BOARD RULE: before reaching for the treatment table, ask "is this muscle tight or is it irritated?" A fever + high WBC + positive psoas sign is NOT a tender point — it's an appendix. Find the source first, every time. THE RULE TRANSFERS TO OTHER JOINTS (same logic, new muscle) - Piriformis (external rotator of hip) → stuck on → restricted INTERNAL ROTATION. Look: deep buttock pain + foot pointing outward; watch the sciatic nerve (piriformis syndrome overlap). - Hamstrings (knee flexion + hip extension) → stuck on → restricted KNEE EXTENSION. This is the contracture pattern seen in bedbound or post-stroke patients (knee held flexed). - Pectoralis major (shoulder internal rotation, adduction, flexion) → stuck on → restricted EXTERNAL ROTATION & EXTENSION. This is the rounded-shoulder desk posture, mapped onto one muscle (tight pec pulls arm forward/inward, so reaching back + turning palm out is lost). - Gluteus maximus (hip extensor) → stuck on → restricted HIP FLEXION (from the rapid-drill quiz). QUIZ / VIGNETTE HIGHLIGHTS - 10M, 3 days difficulty walking after soccer weekend, no trauma, guards bent-forward posture, resists straightening, hypertonic/tender/firm-banded right psoas, hip/knee neurovascularly intact, normal imaging → restricted motion = Extension (psoas is the major hip flexor; stuck pulling into flexion, so the antagonist motion — extension — is lost; NOT flexion [that's the free/already-pulled direction], NOT abduction/internal rotation [governed by other muscles]). - 19M college student, 14hr periumbilical→RLQ pain, nausea, anorexia, T 38.3°C, HR 104, RLQ guarding, pain on PASSIVE right hip extension, WBC 15,800, CT shows dilated retrocecal appendix with fat stranding → Acute appendicitis irritating the psoas (NOT "psoas syndrome" alone — the fever/leukocytosis/CT findings confirm the visceral source, not a primary somatic dysfunction; also not ureteral colic, PID, or lumbar strain — the CT is diagnostic). - Positive Thomas test on the right → most likely somatic dysfunction = Right iliopsoas restriction (flexion contracture) — not posterior innominate rotation, not piriformis tightness, not sacral torsion, not left-sided iliopsoas restriction. 82 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Psoas syndrome with functional scoliosis — mechanism: unilateral psoas spasm tilts the pelvis and pulls the lumbar spine into lateral flexion TOWARD the affected side (not SI joint dysfunction secondary to spasm, not bilateral-spasm hyperkyphosis, not femoral nerve compression causing weakness-driven scoliosis, not fascial spread to erector spinae — the mechanism is direct muscular pull on the lumbar spine). - Acute psoas syndrome with a tender point in the iliac fossa → most appropriate OMT technique = Counterstrain (Jones technique) — not MET for hip extension (would engage the barrier, not appropriate for an acute/tender point), not HVLA (thrust inappropriate for acute muscle spasm/tender point), not FPR or myofascial release (counterstrain is the specific indicated technique for a discrete tender point). - Viscerosomatic reflexes corresponding to the psoas muscle at L1-L3 → Kidney, ureter, and adrenal gland (matches the L1-L3 sympathetic spinal levels for the urogenital/adrenal viscera — cross-reference viscerosomatic reflex table in file 10_viscerosomatic-reflexes.txt; not sigmoid/rectum, pancreas/duodenum, liver/gallbladder, or bladder/reproductive organs, which map to different spinal levels). - 35M runner, anterior groin pain WORSE with hip extension + BETTER with hip flexion, plus L1-L4 lumbar spine pain → primary source = Iliopsoas (psoas major + iliacus) — classic opposite-motion pattern (pain with the lengthening/antagonist motion) plus the L1-L4 lumbar spine involvement pointing to psoas origin; not rectus femoris, quadratus lumborum, piriformis, or sartorius. MEMORY HOOKS - "Name the muscle, name its action, flip it" — the single rule underlying every restricted-motion board question of this type. - Front of the axis = flexor (psoas, pec major); anything crossing anterior to a joint and pulling is a flexor — no chart needed. - Thomas test = the opposite-motion rule made visible: flatten the back, watch which thigh refuses to lie flat. - Appendicitis vs. psoas syndrome: SAME motion pattern (extension hurts), DIFFERENT source — fever + leukocytosis + acute (hours) timeline = surgical emergency, not a tender point. - The rule transfers everywhere: piriformis (ER→loses IR), hamstrings (flexion→loses extension), pec major (IR/add/flex→loses ER/extension), glute max (extension→loses flexion). 83 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Psoas Syndrome & Iliopsoas Dysfunction (Red Flags/MET Detail) OMM · MYOFASCIAL (DETAIL) Psoas Syndrome and Iliopsoas Dysfunction — red flags, direct MET protocol, and technique selection Complements file 25_psoas-syndrome.txt — that file covers the opposite-motion rule, anatomy, Thomas test, and the appendicitis trap. This file focuses on the MET treatment protocol, technique-selection logic, and an expanded red-flag differential. ANATOMY RECAP: Psoas major arises from lumbar region; iliacus fills the iliac fossa; the two join before inserting on the LESSER TROCHANTER. Combined iliopsoas = primary hip flexor. A shortened/guarded unit limits hip extension and alters lumbar/pelvic mechanics. The tendon crosses ANTERIOR to the hip joint axis, producing flexion — restricted extension is the functional opposite of the iliopsoas's own action (same opposite-motion rule as file 25). SUPPORTIVE (NOT DEFINITIVE) FINDINGS for mechanical iliopsoas dysfunction: focal iliopsoas tenderness, restricted passive hip extension, pain with resisted hip flexion, symptoms provoked by prolonged hip flexion or sit-to-stand. KEY PRINCIPLE: "no single maneuver proves it" — restricted extension + pain with resisted flexion form a USEFUL pattern but must be interpreted alongside the differential, not used as a diagnostic shortcut. RED FLAG DIFFERENTIAL (a plausible muscle pattern NEVER cancels a red flag) - Fever, systemic illness, painful hip extension with inflammatory features → infection/abscess concern. - Anticoagulation or trauma with acute groin pain, weakness, or falling hemoglobin → bleeding concern (iliacus/retroperitoneal hematoma). - Objective weakness, reflex change, sensory loss, or bowel/bladder symptoms → neurologic localization needed. - Painful internal rotation, joint catching, marked global loss of ALL hip motion, inability to bear weight → shifts toward INTRA-ARTICULAR/bony hip disease, not the psoas. DIRECT MUSCLE ENERGY PROTOCOL for a shortened iliopsoas (step order): 1. Confirm the mechanical pattern and screen red flags — treat ONLY after the presentation is appropriate for manual care. 2. Position the patient so the involved hip can move TOWARD its restrictive barrier (extension), while controlling pelvic/lumbar substitution (prevent compensation). 3. Ask the patient to gently flex the hip (LOW-FORCE isometric effort) against equal resistance for a brief effort, then allow complete relaxation. 4. Relax and re-engage — move only to the NEW barrier after relaxation (repeat only as tolerated). 84 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 5. Reassess — compare extension, tenderness, and symptoms to baseline. KEY LOGIC: Direct MET moves the joint INTO the restricted direction (extension); the patient's isometric contraction is TOWARD EASE (flexion) — same universal direct-MET pattern as other joints (clinician holds/engages the barrier, patient's effort goes the opposite way, toward ease). TECHNIQUE SELECTION — Direct MET vs. Indirect Counterstrain: - Direct MET: uses gentle ACTIVE hip flexion after the clinician engages the extension barrier. Requires a COOPERATIVE patient who can contract safely. - Indirect Counterstrain: clinician SHORTENS the iliopsoas into a position of EASE and monitors tenderness/tissue response — NO forceful contraction required. Choose this when active contraction or barrier-loading is POORLY TOLERATED (high tissue irritability). Neither technique substitutes for evaluating fever, trauma, progressive weakness, bleeding risk, or fixed painful deformity FIRST. REASSESSMENT PRINCIPLE: improvement (hip extension, sit-to-stand tolerance, reduced pain with resisted flexion, gait) after treatment SUPPORTS a reversible mechanical contribution, but does NOT prove every symptom came from the psoas. Failure to improve, worsening pain, or emergence of systemic/neurologic findings should REOPEN the diagnostic evaluation — "reassessment measures response; it does not retroactively erase competing diagnoses." QUIZ / VIGNETTE HIGHLIGHTS - 32M runner, gradual groin/low-back pain after hill training, focal iliopsoas tenderness + pain with resisted hip flexion + restricted passive hip extension, otherwise normal rotation/strength/reflexes, no red flags → finding that most directly supports iliopsoas dysfunction = pain reproduced by resisted hip flexion WITH restricted hip extension (the combined mechanical pattern; NOT isolated internal-rotation pain [joint-pattern], NOT reduced patellar reflex with weakness [neuro red flag], NOT fever with fixed flexed posture [infection], NOT diffuse abdominal guarding/hypotension [intra-abdominal emergency]). - 45M office worker, anterior hip tightness + low-back discomfort after prolonged sitting, confirmed shortened right iliopsoas, negative red-flag screen, fully cooperative and tolerates gentle extension movement → correct direct MET setup = engage hip extension to the barrier, then ask for GENTLE hip flexion against resistance (not flex further into ease + thrust [that's not MET logic], not force maximal extension passively, not ask for maximal resisted extension from neutral, not skip reassessment). - Acute groin pain patient on ANTICOAGULATION after a recent thromboembolic event, holds hip flexed, NEW knee-extension weakness + reduced patellar reflex, no position relieves the neuro findings → best next step = urgent evaluation for retroperitoneal or iliacus BLEEDING with femoral nerve compression (anticoagulation + acute pain + weakness + reflex loss = bleeding red flag; a flexed posture alone does NOT prove psoas dysfunction — it can occur with infection or retroperitoneal pathology too; do NOT perform forceful MET, do NOT use counterstrain-and-discharge, do NOT diagnose isolated psoas syndrome, do NOT just start home stretching). 85 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - 29M, marked iliopsoas tenderness after an abrupt uncomplicated training strain, direct extension loading causes GUARDING, normal neuro exam and systemic review, clinician wants a low-force approach without active contraction → correct technique = Indirect counterstrain with the hip positioned into ease (active contraction is poorly tolerated here — high irritability calls for the indirect approach, not strong sustained MET or HVLA). - 58M, groin pain + difficulty putting on a shoe, painful GLOBALLY reduced hip rotation + joint-line tenderness + mechanical catch, resisted hip flexion uncomfortable but NOT more provocative than the rest of the exam → correct interpretation = intra-articular hip disease is more likely than isolated iliopsoas dysfunction (global rotation loss + joint-line pain + catching localize to the JOINT, not the muscle; resisted hip-flexion pain here is NON-specific — don't let it substitute for imaging or override joint-pattern findings). - After gentle treatment trial, improved hip extension + easier sit-to-stand, but DEEP PELVIC PAIN unchanged, no red flags → correct interpretation = the treatment changed a mechanical restriction, but persistent pain means the differential should remain OPEN (motion improvement does not "prove" the psoas diagnosis or mean the whole complaint is explained; don't ignore persistent pain just because range improved, and don't escalate to indefinite maintenance OMT or a stronger treatment based on partial response alone). MEMORY HOOKS - "A plausible muscle pattern never cancels a red flag" — the organizing principle of this entire page. - Direct MET: clinician engages the BARRIER (extension); patient's isometric effort goes toward EASE (gentle flexion) — universal direct-MET logic, same as every other joint in this notes set. - Choose counterstrain (indirect) over MET (direct) when active contraction/barrier-loading is POORLY TOLERATED — technique selection follows TISSUE IRRITABILITY, not bravado. - Red-flag combo to memorize: anticoagulation + acute pain + weakness + reflex loss = think retroperitoneal/iliacus BLEED with femoral nerve compression, not simple psoas syndrome. - Global hip rotation loss + joint-line tenderness + catching = JOINT pathology, not muscle — don't let nonspecific resisted-flexion pain override this pattern. - Partial improvement after treatment supports a mechanical CONTRIBUTION, not a diagnostic monopoly — keep the differential open if some symptoms persist. 86 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Piriformis Syndrome PIRIFORMIS SYNDROME — CONDENSED STUDY NOTES OVERVIEW: Piriformis muscle spasms/hypertrophies and compresses the sciatic nerve beneath (or through) it. Classic "pseudo-sciatica" — mimics disc herniation but with a clean neuro exam. Deep buttock pain, worse sitting, hip held externally rotated at rest. ANATOMY (everything follows from this) - Origin: anterior surface of SACRUM, levels S2-S4. - Insertion: superior border of GREATER TROCHANTER (GT). - Action (hip neutral/extended): EXTERNAL ROTATION + ABDUCTION (when hip flexed). - Position-dependent biomechanics (board-testable): in neutral/extension, piriformis is primarily an external rotator. As hip flexes past ~60°, its line of pull shifts — it becomes a primary ABDUCTOR at 90° flexion (basis of Pace's test: resisted abduction + external rotation with hip flexed 90° = selectively loads piriformis, more specific than testing ER alone since it avoids co-activating the other short external rotators). At deep flexion its rotational contribution can reverse toward internal rotation. - Piriformis passes through the GREATER SCIATIC FORAMEN, dividing it into suprapiriformis and infrapiriformis spaces. - Sciatic nerve normally exits via the INFRAPIRIFORMIS space (deep/inferior to the muscle) in ~85-90% of people. - ANATOMIC VARIANT (highly testable): in ~10-15% of people, part of the sciatic nerve passes THROUGH or above the piriformis — most commonly the PERONEAL DIVISION passes through the muscle while the TIBIAL DIVISION passes below it. (Older teaching cites "17%" for any variant path through/above the muscle — both numbers appear in sources, know the concept.) These patients are more prone to piriformis syndrome and may present with predominantly PERONEAL symptoms (foot drop, lateral leg/dorsal foot numbness) rather than full sciatic symptoms, because the peroneal division is the one directly embedded in the muscle. - The Deep 6 external rotators of the hip (all exit via greater sciatic foramen, insert near GT): Piriformis (S2-S4), superior gemellus, inferior gemellus, obturator internus, obturator externus, quadratus femoris. Piriformis is the LARGEST and the only one that can compress the sciatic nerve. Piriformis spasms → compresses sciatic nerve → buttock pain + leg radiation. Piriformis spasms → pulls trochanter posteriorly → hip externally rotated at rest. Sitting compresses piriformis (body weight transmits through ischial tuberosity against the seat, piriformis caught between seat and sacrum) → muscle swells/tightens, presses nerve harder → pain WORSE with prolonged sitting; relief with standing/walking (removes compression). Note: sitting does NOT stretch the piriformis — mechanism is compression, not stretch; the muscle is not even actively contracting when seated (it's most active during 87 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES single-leg stance/gait, stabilizing the hip). THE CLASSIC TRIAD (+ 3 more clues = 6-point checklist) 1. Deep buttock pain (not posterior thigh = hamstring; not lateral hip = trochanteric bursitis) 2. Worse with prolonged sitting 3. Radiates down the leg in sciatic distribution (mimics disc herniation) 4. Hip externally rotated at rest 5. Tender to deep palpation between lateral sacrum and greater trochanter (pressing directly on the piriformis belly) 6. Normal neuro exam (no true nerve root compression) All 6 present → piriformis syndrome → treat with figure-4 stretch + counterstrain or muscle energy. DIAGNOSTIC/PROVOCATIVE TESTS - Straight Leg Raise (SLR): tests nerve root tension AT THE SPINE. Positive (reproduces pain, classically 30-70°) = disc herniation. NEGATIVE SLR + sciatica = compression is downstream (piriformis). This is the single test that best separates disc from piriformis. - FAIR test (Flexion, Adduction, Internal Rotation) — most specific provocative test for piriformis. Mechanism: all three movements are OPPOSITE the piriformis's actions (ER + abduction), so FAIR maximally STRETCHES the piriformis across the sciatic nerve, reproducing pain. (Not a contraction mechanism — contrast with Pace's test, which contracts the piriformis via resisted ER/abduction; both tests can be positive in piriformis syndrome via different mechanisms.) - FABER test (Flexion, ABduction, External Rotation, aka Patrick's test): stresses BOTH the piriformis AND the SI joint — not piriformis-specific. A positive FABER with a NEGATIVE FAIR points AWAY from piriformis and toward SI joint dysfunction, especially if tenderness is at the sacral sulcus (medial, over the joint) rather than between lateral sacrum and GT. - Pace's test: resisted abduction + external rotation with hip flexed to 90° — contracts the piriformis directly (uses the flexion-dependent abductor mechanics above). - H-reflex (EMG/NCS): tests integrity of the S1 nerve root arc. NORMAL H-reflex + abnormal (slowed) distal peroneal conduction = compression is DISTAL to the root, i.e., at the piriformis. Radiculopathy instead shows an ABNORMAL H-reflex and denervation in PARASPINAL muscles (root-level damage). Piriformis syndrome: normal H-reflex, normal paraspinals, denervation/slowing only distal to the piriformis level. Deep buttock pain radiating to leg? NO → consider trochanteric bursitis, SI joint, local strain (no nerve compression). YES → check SLR. SLR positive (30-70°) → lumbar disc herniation → get MRI lumbar spine. SLR negative → check hip external rotation at rest + tenderness between sacrum and GT. 88 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Both present → Piriformis Syndrome → treat: figure-4 stretch + counterstrain/MET; NSAIDs for inflammation; if refractory: trigger point injection or ultrasound-guided corticosteroid into the piriformis. Neither present (SLR negative but no ER/no tender point) → broaden differential: proximal hamstring tendinopathy, "deep gluteal syndrome" (umbrella term for any non-discogenic sciatic entrapment). OMT DECISION TREE — hypertonic vs inhibited piriformis: - Hypertonic (shortened muscle, resists internal rotation): use MUSCLE ENERGY with passive IR — patient resists as physician moves hip into IR, then relaxes; physician stretches into full IR. Repeat 3-5 cycles. Goal: lengthen the spasmed piriformis via post-isometric relaxation. - Inhibited (isolated tender point at piriformis belly, no true spasm): use COUNTERSTRAIN — shorten the piriformis (flexion + abduction + external rotation), monitor the tender point, hold 90 seconds, return slowly. Tender point should resolve ≥70%. - HVLA indicated when MET and counterstrain fail to normalize ROM: side-lying, hip flexed to engage the piriformis, short quick thrust directed toward internal rotation. - If pain is local to the piriformis only (no leg radiation): local piriformis strain — diagnose clinically (tender point, pain with hip IR, FAIR may be mildly positive), treat with MET/counterstrain; no nerve workup needed. COUNTERSTRAIN (indirect, passive) - Position: flex hip + abduct + externally rotate (SHORTENS the piriformis — moves AWAY from the restrictive barrier, i.e., toward the muscle's own action/short position). - Find/monitor the tender point (between lateral sacrum and GT); fine-tune position with small adjustments (flexion/abduction/rotation) to maximize tenderness reduction — 70% is the MINIMUM acceptable threshold, not the goal; aim higher before starting the timer. - Hold 90 seconds, then return to neutral SLOWLY (over 2-3 seconds) to avoid retriggering the muscle spindle. - Mechanism: resets the muscle spindle reflex arc → relieves spasm. - Entirely passive — patient does nothing, no contractions. (Adding an isometric contraction converts this into muscle energy — don't mix techniques.) - Pregnancy modification: use LEFT LATERAL RECUMBENT position (avoid supine after 20 weeks — IVC compression risk), same flexion/abduction/ER positioning, hold 90 sec. Preferred over aggressive deep tissue massage (risk of stimulating uterine contractions via sacral nerve roots), HVLA (contraindicated, especially 3rd trimester, due to relaxin-induced ligamentous laxity), or corticosteroid injection (reserve for refractory cases postpartum). MUSCLE ENERGY (direct, active) 89 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Position to the RESTRICTIVE barrier (first sense of resistance) — NOT the tissue barrier (maximally stretched end-range). Overshooting into the tissue barrier is the classic error that triggers protective muscle guarding and WORSENS pain. - Patient contracts the piriformis by pushing into EXTERNAL ROTATION (its native action) against physician resistance for 3-5 seconds. - Physician then stretches the hip further into INTERNAL ROTATION (the new barrier) via post-isometric relaxation. - Repeat 3-5 cycles. - Pushing into internal rotation during the "contract" phase is wrong — that recruits internal rotators (anterior glut med/min, TFL), not the piriformis. MNEMONIC: Counterstrain = COMFORT (passive, shorten, feel-good position). Muscle Energy = MOVE IT (active, contract then stretch). THE FIGURE-4 STRETCH (patient self-stretch) - Position: supine, cross affected ankle over the opposite knee (creates the "4" shape), pull the OPPOSITE knee toward the chest. - Mechanism: puts the affected hip into flexion + adduction + internal rotation — the exact opposite of the piriformis's own action (ER + abduction) — stretching it maximally. - Board clue: "cross ankle over knee, PULL KNEE TO CHEST" = figure-4/piriformis. The "pull to chest" step is what distinguishes it from the adductor stretch (see below) — omit that step and you're only doing external rotation, which stretches adductors instead. STRETCH LINEUP — DON'T CONFUSE THESE (frequently tested) 1. Figure-4 (piriformis): supine, cross ankle over opposite knee, pull opposite knee to chest. Targets piriformis + deep external rotators. 2. Straight Leg Raise / hamstring stretch: supine, flex hip, extend knee. Targets hamstrings (biceps femoris, semimembranosus, semitendinosus). Presentation clue: POSTERIOR THIGH pain (not buttock), pain with resisted knee extension, possible ecchymosis after acute strain (e.g., gardening/sprinting) — NOT piriformis. 3. Lunge (hip flexor stretch): stand, one leg forward with knee bent, lean forward extending the back hip. Targets iliopsoas/rectus femoris of the back leg. Presentation clue: ANTERIOR hip/groin pain. 4. Cross-Behind Lean (IT band/TFL stretch): stand, cross affected leg BEHIND the other, lean away from the affected side. Targets IT band and TFL. Presentation clue: LATERAL KNEE/THIGH pain in runners, worse going DOWNHILL (IT band friction syndrome at the lateral femoral condyle). 90 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 5. Butterfly/External Rotation (adductor stretch): supine, flex hip and knee, bring hip into EXTERNAL ROTATION (or seated soles-together, press knees down). Targets adductors (longus, brevis, magnus, gracilis). Presentation clue: GROIN/INNER THIGH pain, often after kicking sports (soccer), pain with passive internal rotation and resisted knee extension with hip flexed. BOARD TRAP — Adductor Stretch vs Piriformis Stretch: both start supine with hip flexion, and both can involve external rotation-adjacent positioning conceptually, but the ADDUCTOR stretch is just hip flexion + external rotation opening the hip outward — it is MISSING the "pull opposite knee to chest" step. That pull-to-chest is what forces adduction + internal rotation against the piriformis. Without it, you're only stretching adductors. DIFFERENTIAL DIAGNOSIS — KEY DISTINGUISHING FEATURES - Lumbar Disc Herniation (L4-L5/L5-S1): SLR POSITIVE (30-70°), pain worse with flexion/sitting/Valsalva, dermatomal pattern, possible neuro deficit (reflexes, strength/motor). Piriformis: SLR negative, normal neuro, non-dermatomal. - Trochanteric Bursitis: pain directly OVER the greater trochanter (lateral hip, pinpointable), NO sciatic radiation. Piriformis: pain deep in buttock + leg radiation, tender BETWEEN sacrum and GT (not on top of GT). - SI Joint Dysfunction: tender at PSIS/sacral sulcus (medial, over the joint); FABER can be positive for BOTH conditions, but FAIR is negative in SI dysfunction (FAIR is piriformis-specific). No true sciatica from SI dysfunction alone. - Cauda Equina Syndrome (RED FLAG — surgical emergency): bilateral buttock pain + perineal/saddle numbness + urinary retention/difficulty, from a large central disc herniation compressing S2-S4 roots. These roots control bladder/perineal function — piriformis syndrome does NOT cause perineal numbness or bladder dysfunction (unilateral, sciatic nerve doesn't supply bladder/perineum). Requires decompression within 48 hours to prevent permanent deficit. Any perineal numbness + bladder symptoms = think cauda equina, not piriformis/SI/bursitis. - Gluteus medius tendinopathy: lateral hip pain at the GT insertion (similar location to bursitis); does not cause positive FABER. - Common peroneal neuropathy at the fibular head: peroneal-distribution symptoms but pain starts AT THE KNEE, not the buttock — proximal buttock pain rules this in favor of piriformis-level compression instead. - Pudendal nerve entrapment (near piriformis/sacrospinous ligament): causes PERINEAL/saddle pain, not posterior thigh/calf — different distribution from sciatic. - Femoral nerve: runs ANTERIORLY under the inguinal ligament, supplies quadriceps/anterior thigh — irrelevant to posterior buttock/thigh symptoms. - Obturator nerve/foramen: distinct from sciatic nerve/greater sciatic foramen — do not confuse the two foramina. 91 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Diabetic lumbosacral radiculoplexus neuropathy (diabetic amyotrophy): proximal thigh pain, weakness, weight loss — a PROXIMAL, more diffuse pattern, vs. the distal peroneal-selective pattern of piriformis-level compression via the anatomic variant. - Post-total hip arthroplasty (posterior approach) sciatic nerve injury: posterior approach requires splitting/detaching the piriformis (and short external rotators) to reach the joint capsule; sciatic nerve lies immediately deep to the piriformis and is at risk of stretch/retraction injury. Presents as deep buttock pain + external rotation weakness within weeks post-op. Incidence ~1-2%, higher with revision surgery. Distinguish from: trochanteric bursitis (lateral pain), heterotopic ossification (develops 3-12 months post-op, restricts multiple planes — too early at 6 weeks), prosthetic joint infection (fever, drainage, elevated ESR/CRP, pain with ALL motion, not isolated to ER). General rule: nerve runs through/under a muscle → muscle spasms/hypertrophies → nerve compressed → pain + neuro symptoms in that nerve's distribution → treatment = decompress (stretch/OMT, or surgery if refractory/progressive). - Piriformis Syndrome: Piriformis muscle traps the Sciatic nerve → buttock pain radiating down the leg. - Thoracic Outlet Syndrome: Scalenes/Pec minor trap the Brachial plexus → arm pain + numbness. - Carpal Tunnel Syndrome: Flexor retinaculum traps the Median nerve → hand tingling (digits 1-3.5). - Cubital Tunnel Syndrome: FCU aponeurosis traps the Ulnar nerve → ring/pinky numbness. SPECIAL CLINICAL SCENARIOS / URGENT FLAGS - Foot drop in a patient with known piriformis syndrome (esp. with MRI-confirmed nerve-through-muscle variant) after failed conservative treatment = progressive motor deficit from sciatic (peroneal division) compression → requires URGENT SURGICAL CONSULTATION for piriformis release; delay risks permanent deficit. The anatomic variant and muscle hypertrophy on MRI support the mechanism but are not themselves the emergency — the motor deficit is. - Ballet dancers / deep plie (wide stance squat + forced external rotation): repetitive forceful piriformis contraction under load → muscle hypertrophy → chronic sciatic compression; occupational hazard. (Plie = piriformis CONTRACTING, not stretching — contraction is what worsens compression.) - Diabetic patients: may have "double crush" predisposition — diabetes plus an anatomic variant (peroneal division through piriformis) increases vulnerability to compression injury; presents as peroneal-selective sensorimotor loss with normal H-reflex and unremarkable/mildly degenerative lumbar MRI. ELIMINATION-ROUND LOGIC (quick match, exam technique): given a stretch-position description, work backward from the muscle action. Posterior thigh pain after a sprint → hamstring → straight leg raise/hamstring stretch (supine hip flexion + knee extension), NOT 92 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES figure-4 (that's for deep buttock/piriformis) and NOT the lunge (hip flexor) or cross-behind lean (IT band). CLINICAL VIGNETTE QUICK-HITS (25 cases — scenario / key finding / answer / why) 1. Runner, buttock-to-foot pain, FABER+ and FAIR+, normal MRI → best supporting finding = tenderness between lateral sacrum and GT (the piriformis tender point ties the whole picture together). Trap: decreased ankle reflex → suggests S1 radiculopathy, not piriformis (piriformis reflexes are normal); positive SLR at 30° → disc, not piriformis; positive Trendelenburg → gluteus medius/superior gluteal nerve weakness, unrelated to piriformis (an external rotator, not an abductor stabilizer). 2. Piriformis synd + sacral somatic dysfunction; treating the sacrum first improves piriformis tenderness by 50% → because the piriformis originates from the anterior sacrum (S2-S4); correcting sacral position normalizes tension at the muscle's origin, reducing secondary spasm (though direct piriformis treatment is still usually needed for full resolution — the 50%, not 100%, improvement is the tell). 3. Why is the hip externally rotated in piriformis syndrome? Because the spasmed piriformis (its own action = ER) pulls the GT posteriorly — a direct muscular effect, not a nerve effect or compensatory mechanism. 4. 45F sciatica, SLR negative, FABER+, tender sacrum-to-GT → piriformis syndrome; negative SLR is the key differentiator excluding disc herniation. 5. Truck driver, buttock pain worse with driving, posterior thigh/calf tingling, resisted ER reproduces pain, normal MRI → sciatic nerve (via greater sciatic foramen, deep to piriformis in ~85%) compressed between piriformis and pelvis during sitting. Traps: pudendal nerve = perineal pain only; femoral nerve = anterior thigh, runs under inguinal ligament, unrelated; sciatic nerve passes through the GREATER sciatic foramen, NOT the obturator foramen (that's the obturator nerve). 6. ME for piriformis worsens pain after being taken into flexion/adduction/IR to "the barrier," then resisted ER x3 cycles → error = physician positioned PAST the restrictive barrier into the tissue barrier, causing protective muscle guarding. (5-second hold is fine; ME is not contraindicated; direction of contraction — external rotation — was correct.) 7. Soccer player, groin/inner-thigh pain, pain with passive IR + resisted knee extension with hip flexed → adductor strain → stretch = supine, flex hip and knee, bring hip into EXTERNAL ROTATION (missing the "pull to chest" step that would make it a piriformis/figure-4 stretch). 8. Deep buttock pain, FABER+ but FAIR NEGATIVE, SLR negative, tenderness at the SACRAL SULCUS (not sacrum-to-GT) → SI joint dysfunction more likely than piriformis: FABER stresses both joints/piriformis nonspecifically, but negative FAIR + wrong tender-point location argue against piriformis. 9. Counterstrain performed, position found gives 70% tenderness reduction — what next? Fine-tune the position (small adjustments in flexion/abduction/rotation) to maximize reduction beyond the 70% minimum threshold BEFORE starting the 90-second hold; don't just accept 70% as the goal, and don't abandon the technique (70% already meets the minimum). 93 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 10. Desk worker, pain worse after sitting >30 min, improves with standing/walking, hip ER at rest, IR reproduces pain → mechanism = body weight compresses the piriformis between the ischial tuberosity and seat, indirectly pressing the sciatic nerve beneath it (not active piriformis contraction, not stretch, not disc/Valsalva — standing relieves compression immediately). 11. 50F bilateral buttock pain + perineal numbness + urinary difficulty + large central L4-L5 disc herniation on MRI → CAUDA EQUINA SYNDROME (surgical emergency, S2-S4 root compression) — NOT piriformis (unilateral, no bladder/perineal involvement) — needs urgent decompression. 12. THA via posterior approach 6 weeks ago (piriformis split intraoperatively), now deep buttock pain + ER weakness → sciatic nerve injury from retraction during the posterior approach (1-2% incidence, higher with revision) — not bursitis (lateral pain), heterotopic ossification (too early, multi-plane), or infection (would have systemic signs). 13. Diabetic woman, buttock-to-foot pain, lateral leg/dorsal foot numbness, MRI shows only mild degenerative changes (no herniation/stenosis), EMG shows peroneal-selective denervation with normal H-reflex → piriformis syndrome with the sciatic nerve's peroneal division passing THROUGH the piriformis (10-15% variant); normal H-reflex confirms compression is distal to the root; diabetes may add a "double crush" predisposition. 14. Runner, lateral knee pain worse downhill, tender lateral thigh → IT band syndrome → cross-behind-and-lean stretch (not figure-4, not hamstring stretch, not lunge — match pain location to muscle: anterior=hip flexors, lateral=IT band, posterior thigh=hamstring, deep buttock=piriformis). 15. CrossFit athlete, buttock pain after heavy squats, ER at rest, pain with resisted ER AND resisted abduction at 90° hip flexion → resisted abduction at 90° flexion implicates the piriformis because at that flexion angle its line of pull shifts and it becomes a primary hip abductor (basis of Pace's test) — gluteus medius is the dominant abductor only in neutral hip position. 16. Pregnant patient (28 weeks), piriformis syndrome → treat with gentle counterstrain in LEFT lateral recumbent (avoid supine after 20 weeks — IVC compression), flex/abduct/ER, hold 90 sec — avoid aggressive deep tissue massage, HVLA (relaxin-related joint laxity), and corticosteroid injections during pregnancy. 17. 38F, 4 months deep buttock pain worse sitting, radiates to posterior thigh, ER at rest, normal neuro → figure-4 stretch (textbook piriformis presentation); hamstring/lunge/adductor stretches all mismatch the presentation. 18. What % have the sciatic nerve passing through the piriformis, and why does it matter? ~10-15% (most commonly just the peroneal division); this variant predisposes to compression from muscle hypertrophy/spasm and can produce predominantly peroneal symptoms (foot drop, lateral leg numbness). ~85-90% have the nerve passing normally BELOW (deep to) the piriformis. 19. Why does the FAIR test reproduce piriformis pain? Flexion + Adduction + Internal Rotation are all OPPOSITE the piriformis's actions (ER + abduction), so the combination maximally STRETCHES the piriformis across the sciatic nerve, provoking pain (contrast with Pace's test, which CONTRACTS the piriformis via resisted ER/abduction — different mechanism, both can be positive). 94 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 20. Bilateral piriformis syndrome, failed 3 months of MET/stretching, MRI shows bilateral hypertrophy + nerve passing through the right piriformis, now right FOOT DROP → most concerning/urgent finding = the foot drop (progressive motor deficit) → requires urgent surgical consultation/release; the anatomic variant and hypertrophy are supportive but not themselves urgent. 21. Ballet dancer, chronic right piriformis syndrome flaring with deep plie (wide stance + forced ER) → repetitive forceful piriformis contraction under load causes hypertrophy → chronic sciatic compression (occupational hazard); plie = contraction (not stretch) of the piriformis, worsening compression. 22. During ME for left piriformis syndrome, which direction does the patient push? INTO EXTERNAL ROTATION (the piriformis's native action) against physician resistance; physician then stretches into internal rotation. 23. Which patient is LEAST likely to have piriformis syndrome? The one with POSTERIOR THIGH pain after gardening, pain with resisted knee extension, and ECCHYMOSIS — classic hamstring strain (thigh pain + bruising = muscle tear, not nerve entrapment), unlike the other three classic piriformis presentations (buttock pain worse with stairs/sitting, tender sacrum-to-GT, normal neuro, normal MRI). 24. After locating the piriformis tender point, correct counterstrain position: supine with hip FLEXED, ABDUCTED, and EXTERNALLY ROTATED (shortens the muscle — indirect technique). Flexed+adducted+internally rotated or extended+internally rotated positions STRETCH the piriformis (wrong direction for counterstrain — that's the ME/direct approach); neutral hip in lateral recumbent doesn't specifically shorten it either. 25. EMG/NCS: slowed peroneal component of the sciatic nerve, but NORMAL bilateral H-reflex → most consistent with piriformis-LEVEL (distal) compression rather than lumbar radiculopathy, because a normal H-reflex indicates the S1 nerve root itself is intact; radiculopathy would show an abnormal H-reflex plus paraspinal denervation, whereas piriformis-level compression shows normal H-reflex/paraspinals with only distal conduction abnormalities. KEY BOARD-RULE REMINDER (recurring theme across vignettes): choose the answer that explains the WHOLE clinical presentation (all the given findings together), not just one isolated clue — vignettes are designed so multiple findings converge on a single "best fit" diagnosis or mechanism. 95 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Soft Tissue Techniques OMM · DIRECT TECHNIQUES Soft Tissue Techniques — Press, Pull, or Let Go THE THREE QUESTIONS EVERY SOFT-TISSUE STEM IS ASKING: (1) pressing or pulling? (2) along the fiber or across it? (3) toward the barrier or away from it? Three small words in the stem (traction, into, perpendicular) decide the whole answer. DEFINITION: Soft tissue technique = a group of DIRECT techniques usually involving lateral stretching, linear stretching, deep pressure, traction, and separation of muscle origin/insertion, while the physician monitors tissue response/motion changes by palpation. Historically a form of myofascial treatment. Mechanism = FASCIAL CREEP: a steady held load slowly lengthens fascia, so the muscle relaxes and motion improves. DIRECT vs INDIRECT (the split that controls half the wrong answers): - Direct: tissue moved TOWARD the restrictive barrier, INTO the bind. Soft tissue is ALWAYS direct. Other direct techniques: muscle energy, HVLA. Stem cue: "into the barrier," "engages the bind." - Indirect: tissue moved AWAY from the barrier, TOWARD ease. Indirect myofascial release and counterstrain live here — these are NOT soft tissue technique. Stem cue: "away from the barrier," "toward ease." BOARD ANCHOR (memorize verbatim): "Soft tissue is always DIRECT. It engages the barrier. The moment a stem says 'moved away from the barrier toward ease,' you are looking at counterstrain or indirect release, not soft tissue." THE THREE STYLES (all direct, all soft tissue) 1. Parallel (linear) traction: contact = origin AND insertion (the two ends of the muscle). Force = directed PARALLEL to the long musculotendinous axis, pulling the ends apart to lengthen end-to-end (hands can move opposite each other, or one end anchored). One-line: stretching fibers in the SAME direction they run. 2. Perpendicular traction (kneading): contact = the MIDPOINT of the muscle belly (between origin/insertion). Force = directed PERPENDICULAR (90° away) from the long axis — this is "contralateral traction pulled across the muscle belly." One-line: stretching fibers ACROSS the direction they run. 3. Direct inhibitory pressure: contact = the MUSCULOTENDINOUS portion of a hypertonic muscle (NOT the belly — deep belly pressure causes pain/bruising). Force = sustained PRESSURE directed INTO the muscle, held ~30-60 seconds (some vignettes say 45 sec) until it releases (length increases, tension drops). This is the ONLY style that PRESSES rather than pulls. Useful for painful hypertonic states like piriformis or gluteus. KEY DISCRIMINATORS: Ends vs. middle → hands at the ends (origin+insertion) = parallel; hand at the middle (belly midpoint) = perpendicular. Pull vs. press → "traction" = pull (rules 96 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES OUT inhibition, which presses). Along vs. across → parallel = along the fibers; perpendicular = across the fibers (90°). INHIBITION SAFETY RULE: direct inhibitory pressure goes at the TENDON or musculotendinous junction, NEVER the belly — deep belly pressure can cause pain and bruising. Hold 30-60 seconds until the tissue releases. THE FOUR NEIGHBORS (soft tissue's look-alikes — the exact discrimination boards build questions on) - Soft tissue: DIRECT, patient PASSIVE. Physician applies stretch/pressure/traction while patient stays passive. Three styles as above. - Muscle energy: DIRECT, but patient ACTIVE. Patient actively CONTRACTS against physician's counterforce; slack then taken up. The ACTIVE PATIENT CONTRACTION is the tell — direct like soft tissue, but needs the patient working. - Counterstrain: INDIRECT, position of ease. Find a tender point, fold patient into the MOST COMFORTABLE position (away from the barrier), hold ~90 seconds, return slowly. Indirect — the OPPOSITE of soft tissue. - HVLA: DIRECT, quick thrust. High-velocity, low-amplitude thrust through the restrictive barrier — often used AFTER soft tissue warms the tissue first. Direct, but a fast thrust rather than a held stretch. WHEN TO USE SOFT TISSUE: workhorse for chronically hypertonic paraspinal muscle; for WARMING/RELAXING tissue BEFORE HVLA; for assessing tissue texture before more specific treatment. General, low-risk, good starting point. RHYTHMIC EXTENSIONS OF SOFT TISSUE (same hands, different rhythm/intent) - Lymphatic technique: soft tissue applied as a RHYTHMIC, PUMPING engagement — intent shifts from lengthening tissue to MOVING FLUID. - Articulatory/combined technique: soft tissue stretch PAIRED WITH carrying a joint repeatedly through its motion — low-velocity, repetitive, springing the joint to restore range. Memory: "Add rhythm and soft tissue becomes lymphatic; add joint motion and it becomes articulatory." WORKED COLD-OPEN CASE: 9M, woke with head turned/held to one side ("slept wrong"), sidebent neck cannot return to neutral, fracture ruled out; physician applies sustained pull directed STRAIGHT ACROSS the muscle belly, away from its long axis, until tissue softens → Perpendicular traction across the muscle belly (word "across" + pull [not press] + belly-midpoint contact = perpendicular traction; NOT indirect myofascial release [soft tissue engages the barrier = direct], NOT direct inhibitory pressure [this is a pull, not a press], NOT parallel traction [force runs across, not along, the fibers]). QUIZ / VIGNETTE HIGHLIGHTS (all 10 vignettes from the board walkthrough) 97 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 1. 32M, chronic right gluteal pain worse with sitting, piriformis taut/tender, sustained force directed STRAIGHT INTO it, held ~45 sec until softens → Direct inhibitory pressure (piriformis is a classic target; NOT parallel traction [pulls at ends, not press into belly], NOT counterstrain [uses ease, not barrier-engaging pressure], NOT indirect release [moves away from barrier], NOT perpendicular traction [pulls across, doesn't press in]). 2. 50F, pre-HVLA for a hypomobile thoracic segment, physician first applies broad lateral/linear stretch to paraspinals → soft tissue's role here = it WARMS AND RELAXES the tissue and improves the setup for HVLA (NOT delivering the corrective thrust itself, NOT a held ease position, NOT requiring active patient contraction, NOT moving away from the barrier). 3. 41M, chronic thoracic paraspinal hypertonicity, physician contacts the MIDPOINT of the muscle belly and draws it across 90° from the long axis → Perpendicular (kneading) traction (belly-midpoint contact + force across the axis; NOT muscle energy [no active contraction], NOT inhibition [pulls across, doesn't press in], NOT parallel traction [wrong contact point — that's at the ends], NOT counterstrain [no held ease position]). 4. 44M, thoracic stiffness, slow repetitive low-velocity treatment carrying the segment through motion repeatedly while stretching surrounding tissue → blends into Articulatory/combined technique (soft tissue + repetitive low-velocity joint motion; NOT inhibition [static press, no joint motion], NOT HVLA [that's one fast thrust], NOT counterstrain [holds a position, doesn't move the joint], NOT indirect release [backs off rather than engaging/springing the joint]). 5. 27F, chronic posterior neck tightness, physician contacts ORIGIN and INSERTION and pulls the two ends apart along the long axis → Parallel (linear) traction (contact at the ends + force along the axis; standard discriminator against perpendicular [midpoint contact, across-axis force], inhibition [press, not pull], counterstrain [no ease hold], indirect release [engages rather than backs off the barrier]). 6. 26M, postural neck tension, physician applies slow rhythmic PUMPING engagement intended to move FLUID rather than lengthen a single muscle → this rhythmic soft tissue functions as Lymphatic technique (rhythm + fluid-movement intent = the defining shift; NOT counterstrain [no held ease], NOT HVLA [no thrust], NOT inhibition [not a single sustained press], NOT parallel traction [goal isn't lengthening one muscle]). 7. 35M runner, chronic gluteal hypertonicity, physician plans direct inhibitory pressure but is concerned about pain/bruising — where should the sustained pressure go? → At the tendon or musculotendinous junction (NOT away toward ease [that would be indirect, not inhibition], NOT the nearest joint line [inhibition targets muscle, not joint], NOT "anywhere, only duration matters" [location matters — belly pressure bruises], NOT the center of the muscle belly [causes pain/bruising]). 8. 9M (same torticollis case as cold-open, restated), contralateral traction across the involved cervical muscle until it releases → Perpendicular traction across the muscle belly (the word "traction" = pull [rules out inhibition]; force runs ACROSS the fiber axis [rules out parallel]; this is direct/engages the barrier [rules out indirect release]; it's a held stretch not a thrust [rules out HVLA]). 98 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES 9. 38M, low back stiffness, asked to ACTIVELY PUSH his trunk against the physician's steady counterforce, then relax, slack taken up; the physician explicitly notes "this part is not soft tissue" → Muscle energy (the ACTIVE patient contraction against resistance is the defining move — soft tissue keeps the patient passive; NOT soft tissue parallel or perpendicular traction [both require patient passivity], NOT direct inhibitory pressure [physician press, not patient effort], NOT counterstrain [passive ease, not active contraction]). 10. 29F, neck pain, tender point at anterior neck, physician folds her into the position of GREATEST COMFORT and holds ~90 seconds, then returns slowly to neutral → Counterstrain, an indirect technique, NOT soft tissue (tender point + held ease position = counterstrain's defining features; NOT soft tissue inhibition [engages the barrier, opposite of ease], NOT perpendicular traction [no cross-belly pull], NOT muscle energy [no active patient contraction], NOT HVLA [no thrust]). MEMORY HOOKS - "Soft tissue is always DIRECT" — the single most-tested classification fact on this topic. - Three questions for every stem: press or pull? along or across? toward barrier or away? - Ends = parallel; middle/belly = perpendicular; press into = inhibition (at the tendon, never the belly). - "Traction" in the stem rules OUT inhibition (traction = pull; inhibition = press). - Active patient contraction = muscle energy (not soft tissue, even though both are "direct"). - Tender point + held position of ease = counterstrain (indirect, the opposite of soft tissue). - Rhythmic/pumping soft tissue = lymphatic technique; soft tissue + repetitive joint motion = articulatory/combined technique. - Soft tissue often precedes HVLA to warm/relax tissue and improve the setup — it is preparation, not the corrective thrust itself. 99 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Myofascial Release & the Muscle Stretch Reflex OMM · MYOFASCIAL / NEUROPHYSIOLOGY Myofascial Release (MFR) and the Muscle Stretch Reflex — mechanism restraint and technique discrimination CORE FRAMING: slow fascial loading (MFR) and a rapid tendon tap (myotatic reflex) are NOT the same event, even though both interact with tissue and neural responses — this page repeatedly emphasizes not over-claiming mechanism. MYOTATIC (STRETCH) REFLEX PATHWAY (5-step sequence) 1. Sudden muscle stretch → changes intrafusal fiber length. 2. Muscle spindle afferent fires → carries the length-change signal to the spinal cord. 3. Agonist alpha motor neuron activated → contracts the stretched muscle. 4. Antagonist activity inhibited → reciprocal inhibition supports the movement. 5. Limb movement occurs → the tendon-tap response becomes visible. Receptor: MUSCLE SPINDLE initiates the classic myotatic reflex (NOT Golgi tendon organ [that responds to tension/is inhibitory via a different pathway], NOT Pacinian corpuscle [skin], NOT joint free nerve endings, NOT vestibular hair cells). WORKED EXAMPLE: seated patient, patellar tendon tap → quadriceps briefly LENGTHENS (the stretch stimulus) → lower leg extends (agonist contraction) → hamstring activity reduced (reciprocal inhibition of antagonist) → receptor = muscle spindle. BOARD CAUTION: this reflex explains a tendon-tap response and protective resistance to RAPID stretch — it should NOT be confused with every form of palpatory tissue resistance felt during slow manual techniques. DIRECT vs INDIRECT MFR vs MUSCLE ENERGY (three approaches, all use palpation, differ in direction/patient participation): - Direct MFR: clinician PASSIVELY loads tissue TOWARD a restrictive barrier. - Indirect MFR: clinician PASSIVELY follows tissue TOWARD ease. - Muscle energy: requires an ACTIVE PATIENT CONTRACTION against clinician resistance. BOARD TRAP explicitly called out: "Calling passive MFR a form of MET obscures both the treatment setup and the physiologic claims that can reasonably be made" — MFR (direct or indirect) is passive; MET is active. Don't conflate them just because both can be "direct." Additional category: Rapid passive stretch may provoke a BRISK MYOTATIC response rather than a slow release — this is why MFR uses slow, controlled loading (to avoid triggering the stretch reflex, which would be counterproductive/provoke guarding). 100 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES FASCIA — NO SINGLE UNIVERSAL DEFINITION: fascia is connective tissue that surrounds/separates muscles and organs, transmits load, supports structure, and permits relative motion between layers — but there is NO single universally accepted definition that makes every fascial layer one mechanically uniform sheet. Tissue layers: Superficial connective tissue (links skin and deeper layers, allows glide); Deep muscular fascia (separates/supports muscle compartments); Visceral connective tissue (supports organs, permits motion relative to neighbors). IMPORTANT CAUTION: palpatory restriction may reflect connective tissue, muscle tone, pain, guarding, hydration, joint position, AND examiner technique — NOT one isolated reflex or mechanism. "Fascia is a useful anatomy concept, not permission to invent one universal mechanism." DOSING/TEMPO: clinicians commonly use SLOW SUSTAINED loading during MFR so tissue can be monitored without triggering the abrupt stretch that provokes a strong myotatic response. EXPLICITLY REJECTED CLAIMS (the page is emphatic about this — a recurring theme/likely exam trap): the cited evidence does NOT justify claiming that MFR "resets gamma gain," "permanently desensitizes muscle spindles," or "mechanically melts adhesions." The practical endpoint is a TOLERABLE change in tissue response, motion, pain, or function, followed by REASSESSMENT — not a claim about a specific microscopic mechanism. Features that fit a CAUTIOUS/GOOD MFR application: slow sustained low-force loading (reduces brisk stretch-response risk); continuous monitoring of pain/guarding (allows adjustment/stopping); improved motion/function on reassessment (a meaningful response measure). Features that do NOT fit (bad): a claim of "permanent spindle reset" (exceeds the evidence); forceful rapid stretch into sharp pain (provokes a protective response, not the intended method). DOCUMENTATION PRINCIPLE: a change felt under the hands is a real OBSERVATION but is NOT automatic proof of mechanism. Correct documentation states: the finding, the technique direction (toward barrier or toward ease), patient tolerance, and the reassessment result — e.g., "Direct MFR toward the restrictive barrier was tolerated, followed by reduced palpatory resistance and improved wrist motion" is defensible; claiming "the treatment permanently reset gamma gain" or "the fascia was objectively melted" is NOT defensible documentation. CONTRAINDICATIONS / REASONS TO STOP: acute fracture, unstable injury, acute infection, open/recently incised tissue, local malignancy, or another serious process can make local manual treatment INAPPROPRIATE. During treatment: sharp pain, neurologic worsening, autonomic distress, or unexpected tissue instability requires STOPPING and reassessing immediately. When presentation IS appropriate, direct vs. indirect technique choice follows tissue irritability and patient tolerance (same logic as psoas/iliopsoas file 26). QUIZ / VIGNETTE HIGHLIGHTS 101 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Broad nonacute thoracolumbar tissue restriction, no fracture/infection/neuro deficit/severe pain, clinician PASSIVELY follows tissue AWAY from the restrictive barrier into the position of GREATEST EASE and waits → Indirect myofascial release (passive + toward ease = the defining combination; not direct MFR [wrong direction], not muscle energy [no active contraction], not HVLA [not a thrust], not tendon-tap testing [not a reflex test]). - Teaching note claims slow MFR "permanently resets gamma motor-neuron gain and irreversibly desensitizes muscle spindles after one session," citing only general fascia/myotatic-reflex reviews → correct revision: describe slow loading as a way to AVOID a brisk stretch response and report OBSERVED changes WITHOUT claiming a permanent spindle reset (not "keep the claim," not "fascia melts under pressure," not "direct MFR and MET are physiologically identical" [they differ by patient activity], not "remove all mention of reassessment" [reassessment should stay]). - Acute focal back pain after a fall, midline BONY tenderness, cannot bear weight, patient requests deep direct MFR because paraspinals feel tight → best next step = evaluate for FRACTURE or unstable injury BEFORE applying local MFR (tight tissue after trauma may be GUARDING a fracture — red flags override the desire to treat "tight tissue"; do NOT apply stronger pressure, do NOT use indirect MFR without examination, do NOT diagnose a fascia-only problem, do NOT perform repeated tendon taps). - Clinician passively loads a forearm restriction TOWARD the barrier with slow tolerable force, patient stays relaxed/doesn't contract, tissue feels less resistant, wrist motion improves → most defensible documentation = "Direct MFR toward the restrictive barrier was tolerated, followed by reduced palpatory resistance and improved wrist motion" (state direction + tolerance + reassessment; do NOT claim "permanently reset gamma gain," do NOT mislabel as muscle energy [no active contraction occurred], do NOT claim "the fascia was objectively melted," do NOT skip reassessment). - Safe mechanical restriction, patient develops SHARP PAIN and NEW TINGLING during a direct MFR setup, clinician hasn't reached expected endpoint and wonders whether to continue → safest action = STOP the technique and reassess the patient and localization (new pain/neurologic symptoms are NOT a normal "release" sign — they end the attempt; do NOT increase force, do NOT continue assuming tingling is normal, do NOT switch immediately to a thrust technique, do NOT ignore symptoms even if tissue texture changes). MEMORY HOOKS - Myotatic reflex = RAPID stretch → muscle spindle → agonist contracts + antagonist inhibited (reciprocal inhibition). This is NOT what MFR is doing — MFR deliberately goes SLOW to avoid triggering this reflex. - Direct MFR = passive + toward barrier. Indirect MFR = passive + toward ease. Muscle energy = ACTIVE + toward barrier (patient contracts). Passive vs. active is the key discriminator between MFR and MET, even when both are "direct." - Never claim a specific neural/mechanistic proof (gamma reset, spindle desensitization, "melted" fascia/adhesions) from a palpatory or functional change — document the OBSERVATION (direction, tolerance, reassessment result), not an invented mechanism. 102 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - New sharp pain or neurologic symptoms during any manual technique = STOP immediately, don't push toward an "expected" release. - Tight tissue after trauma with bony tenderness/inability to bear weight = think FRACTURE first, not fascial restriction — evaluate before treating. 103 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES Fascial Subtypes OMM · CONNECTIVE TISSUE Fascial Subtypes: Why the Joint Capsule Is Deep Fascia ELITE-GATED PAGE — free preview covers the full classification framework, the behavior/mechanoreceptor section, and vignette 1 of an 18-question bank; vignettes 2-18 are behind the paywall. THE CORE TRAP/ANSWER: the fibrous sleeve wrapping a synovial joint (joint capsule) — anchoring to periarticular bone and blending with ligaments/tendons — is a specialization of DEEP FASCIA, not visceral, superficial, parietal, or subserous fascia. DECISION METHOD: "Read it in order: tissue texture, then where it anchors, then name the layer. Dense and organized, gripping the skeleton, equals deep fascia." THE FIVE FASCIAL SUBTYPES (by depth/what they touch) - Superficial fascia: loose areolar tissue packed with fat, just deep to the dermis. Carries cutaneous nerves, vessels, lymphatics; lets skin glide. NOT a fascial subtype itself is the skin — fascia begins BENEATH it. - Deep fascia: dense, ORGANIZED collagen that invests muscle, sends in intermuscular septa, forms retinacula, aponeuroses, AND joint capsules. Grips the skeleton (blends with periosteum). - Visceral fascia (broad category, around body cavities) splits into three sub-layers depending on what surface it meets: - Parietal: lines the inner WALL of a cavity, deep to the parietal serous membrane. Named examples: transversalis fascia, endothoracic fascia. - Visceral (specific sub-layer): invests an individual ORGAN. Classic example: renal (Gerota) fascia around the kidney. - Subserous: the thin GLIDE layer between parietal fascia and the serous membrane — extraperitoneal fat and areolar plane. DECISION FORKS: Texture test — loose/fatty = superficial; dense/organized = deep. Anchor test — grips the skeleton (septa, retinacula, aponeuroses, joint capsules) = deep fascia. Cavity test — wall = parietal; organ = visceral; glide layer between = subserous. NAMED FASCIA TO MEMORIZE - Deep names: fascia lata + iliotibial tract, thoracolumbar fascia, plantar aponeurosis, palmar aponeurosis, EVERY joint capsule. - Superficial names: Camper's fascia (fatty layer) and Scarpa's fascia (membranous layer) in the abdomen; Dartos fascia in the scrotum; Colles' fascia in the perineum. 104 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES - Cavity names: Transversalis and endothoracic fascia = parietal; Gerota's fascia = visceral; extraperitoneal fat = subserous. HOW FASCIA BEHAVES (not just packaging — it senses and it gives) - VISCOELASTIC: fascia creeps under sustained load and rebounds when released. Viscosity yields slowly; elasticity springs back. This slow give is the basis of MYOFASCIAL RELEASE (cross-reference file 29_myofascial-release-stretch-reflex.txt — that file emphasizes not overclaiming mechanism, this page frames the viscoelastic property as the underlying basis). - TENSEGRITY: bones are compression struts; the fascial web is the continuous TENSION network. Load applied anywhere spreads through the WHOLE network, not just bone to bone (a whole-body-connected model). - FOUR MECHANORECEPTORS in fascia: Golgi (answers to CONTRACTION), Pacini (answers to RAPID pressure/vibration), Ruffini (answers to SUSTAINED pressure/slow stretch — associated with lowering sympathetic tone), Interstitial free nerve endings (the MOST NUMEROUS fascial receptor type). ANSWER LADDER (the page's own summary method) 1. Texture first: fatty = superficial, dense = deep. 2. Anchor next: gripping the skeleton = deep fascia. 3. Around a cavity: wall = parietal, organ = visceral, glide layer = subserous. 4. Joint capsule, retinaculum, aponeurosis, septum: ALL deep fascia. 5. Behavior: viscoelastic creep, tensegrity tension, four mechanoreceptors. QUIZ HIGHLIGHT (only 1 of 18 vignettes accessible in free preview) - 38F, stress-related neck tension, treated with slow SUSTAINED pressure to cervical fascia, exam shows falling heart rate + relaxed tissue during the hold + falling skin conductance (decreasing sympathetic tone) — which mechanoreceptor fits an ending that responds to SUSTAINED pressure and SLOW STRETCH by lowering sympathetic tone? → Ruffini receptor (matches sustained-pressure/slow-stretch response + parasympathetic/sympathetic-lowering effect; NOT interstitial free nerve ending [most numerous but not specifically this sustained-pressure-lowers-sympathetic-tone profile], NOT a "piezoelectric sensor" [not a real fascial mechanoreceptor category], NOT Pacinian [responds to RAPID pressure/vibration, not sustained], NOT Golgi [responds to muscle CONTRACTION/tension, not sustained skin/fascial pressure]). [NOTE: vignettes 2-18 of this bank are behind the Elite paywall ($9.99/month) and were not accessible; the 4-receptor framework above and the answer ladder should cover the same underlying concepts likely tested in the locked vignettes.] 105 OMM / OMT BOARD REVIEW PART 4 — COUNTERSTRAIN, MYOFASCIAL & SOFT TISSUE TECHNIQUES MEMORY HOOKS - "Dense + organized + grips skeleton = deep fascia" — the single rule that resolves the joint-capsule classification trap. - Superficial = fatty/loose (glide layer under skin); Deep = dense/organized (grips bone: septa, retinacula, aponeuroses, joint capsules); Visceral splits into Parietal (wall), Visceral (organ), Subserous (glide layer between them). - Gerota's fascia = kidney (visceral); transversalis/endothoracic = wall (parietal); extraperitoneal fat = glide layer (subserous). - Four fascial mechanoreceptors: Golgi=contraction, Pacini=rapid pressure, Ruffini=sustained pressure/slow stretch (lowers sympathetic tone), free nerve endings=most numerous. - Viscoelastic creep = the physiologic basis for myofascial release holds; Tensegrity = load anywhere spreads through the whole connected fascial web, not just locally. 106 PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS PART 5 VISCEROSOMATICS, AUTONOMICS & LYMPHATICS IN THIS PART Viscerosomatic Reflexes & Chapman Points Autonomic Spinal Levels Colonic Parasympathetic Viscerosomatic Reflexes Lymphatic OMT: Pumps & Pathway Techniques 107 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Viscerosomatic Reflexes & Chapman Points VISCEROSOMATIC REFLEXES — ORGAN PATHOLOGY → SOMATIC DYSFUNCTION, AND VICE VERSA Opener: 52M left shoulder pain, no MSK history, T1-T5 paravertebral tissue texture changes LEFT, ECG ST elevations → Viscerosomatic reflex from cardiac sympathetic afferents (T1-T5). Cardiac sympathetic afferents travel with T1-T5 sympathetics; when heart ischemic, these converge on same spinal segments as somatic fibers from chest wall/left arm (via rami communicantes); brain can't distinguish, interprets as somatic pain AND produces reflex facilitation of T1-T5 → palpable tissue texture changes. VISCEROSOMATIC (organ pain → spine tightens): Visceral organ injury/disease → afferent nerve travels with sympathetics → dorsal horn (spinal segment) → somatic muscle (paraspinal hypertonicity). SOMATOVISCERAL (spine problem → organ affected): Somatic dysfunction (restricted segment) → facilitated segment (spinal cord) → efferent nerve travels with sympathetics → visceral organ (altered function). KEY CONCEPT: Visceral and somatic afferents from same spinal segment converge in dorsal horn. Brain reads signal as somatic because body maps skin/muscle better than deep organs. Viscerosomatic (Organ→Spine): visceral disease activates afferents sharing spinal segment with somatic structures; dorsal horn becomes facilitated (lowered firing threshold); result = predictable paraspinal hypertonicity, skin texture change, tenderness. Somatovisceral (Spine→Organ): somatic dysfunction can drive efferent output back toward viscera at that level; facilitated segment can increase sympathetic tone to matching organ; treating segment may quiet the loop. Heart: T1-T5 (L, left-sided) — Sympathetic — Left arm+chest pain = T1-T5 SD Lungs: T2-T7 — Sympathetic — Pneumonia can produce upper thoracic SD Esophagus: T2-T8 — Sympathetic — GERD: mid-thoracic restriction common Stomach: T5-T9 — Sympathetic — PUD: T6-T8 paraspinal tenderness 108 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Liver/Gallbladder: T7-T9 (R, right-sided) — Sympathetic — Cholecystitis: right T7-T9 tissue changes; C3-C5 for diaphragmatic referral (shoulder tip pain) Pancreas: T6-T10 — Sympathetic — Pancreatitis: midline to left mid-thoracic Small Intestine: T10-T11 — Sympathetic — Crohn's/obstruction: periumbilical referral Appendix/Colon: T11-L1 — Sympathetic — Appendicitis: periumbilical pain (T10) then McBurney's Kidney/Ureter: T10-L1 — Sympathetic — Renal colic: flank to groin; CVA tenderness maps T11-L1 Bladder/Uterus: T10-L2 + S2-S4 — Sympathetic + Parasympathetic — DUAL innervation: lower thoracic/lumbar AND sacral dysfunction both possible Ovary/Testis: T10-T11 — Sympathetic — Ovarian torsion: periumbilical referral (T10) Diaphragm: C3-C5 — Phrenic nerve — Subdiaphragmatic irritation (blood, pus, gallbladder) = shoulder tip pain MEMORY TRICK: Embryological gut divisions determine spinal levels (NOT anatomical position). Foregut (T5-T9): stomach, duodenum, liver, gallbladder, pancreas — "Foregut Five-Nine," via greater splanchnic nerve. Midgut (T10-T11): small intestine, appendix, ascending/transverse colon, ovary/testis. Hindgut (T11-L1): descending/sigmoid colon. VISCEROSOMATIC vs SOMATOVISCERAL — direction/use: Viscerosomatic (Organ→Spine): DIAGNOSTIC use. Organ pathology creates somatic dysfunction at corresponding levels; spine becomes a "read-out" of visceral disease. Finding tissue texture changes at predictable levels guides workup (e.g., T1-T5 changes in chest pain = rule out MI first; T10-T11 + periumbilical pain = consider appendicitis). Somatovisceral (Spine→Organ): THERAPEUTIC use. Spinal SD sends abnormal efferent signals to viscera, potentially altering organ function; treatment of spine can improve organ function. E.g., treating T5-T9 SD may improve gastric function; sacral OMM (S2-S4) can modulate bladder/bowel motility. Rationale for OMM in systemic disease is largely somatovisceral. Mechanism recap — Viscerosomatic: visceral afferents (with sympathetics) converge on dorsal horn neurons also receiving somatic input; repetitive visceral firing lowers threshold (facilitates) segment; result = tissue texture changes, restricted ROM, tenderness. Mechanism recap — Somatovisceral: somatic dysfunction facilitates same segment; facilitated neurons fire more easily/frequently; efferent limb (sympathetic fibers to viscera) activated, increasing organ tone/vasospasm/altering secretion. THE FACILITATED SEGMENT (Irvin Korr's concept): spinal cord level with chronically LOWERED threshold for neural activity — sub-threshold inputs now cause full firing. Both viscerosomatic (in) and somatovisceral (out) amplified at a facilitated segment. 109 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS How facilitation develops: chronic/repeated afferent bombardment (soma or viscera) → increased synaptic efficiency at that cord level → fewer incoming signals needed to trigger output ("hair-trigger after prolonged stress"). Exam findings at facilitated segment: tissue texture changes (boggy, ropey, stringy), paraspinal hypertonicity, skin temperature changes (sympathetic vasomotor), tenderness, restricted segmental motion = TART criteria (Tissue texture, Asymmetry, ROM restriction, Tenderness — any combination qualifies as SD; facilitated segment often has all four). Clinical implication: chronic facilitated segment at T4-T5 with recurrent "chest tightness" should prompt cardiac eval even without classic ECG changes. Treating the facilitated segment may reduce visceral symptoms by normalizing efferent sympathetic tone. Facilitation persistence: outlasts the original visceral stimulus because the neurophysiological threshold change becomes the new baseline — segment stays hyperexcitable/self-sustaining even after organ pathology resolves (e.g., T4-T5 facilitation persisting after angina medically managed). This is a FUNCTIONAL change (lowered dorsal horn synaptic threshold), NOT structural spinal cord damage — reversible with OMM. THIGH CHAPMAN POINTS — "THE FLIP RULE" for colon: colon Chapman points on thigh WRAP AROUND like a tube, not laid flat as anatomically pictured. - Lateral thigh (IT band) = Cecum/Ascending colon — SNS T10-T11 — abdominal cross-ref: tip of right 12th rib - Anterior (mid) thigh = Transverse colon — SNS T10-T11 — abdominal cross-ref: periumbilical region - Medial thigh (left thigh region) = Descending colon — SNS T12-L2 — abdominal cross-ref: lateral to rectus, mid-abdomen left - Posterior thigh = Sigmoid colon — SNS L1-L2 — abdominal cross-ref: LLQ near ASIS Mechanism: tenderness on thigh maps colon dysfunction through visceral afferents converging at lumbar segments, traveling via lumbar splanchnic nerves + inferior mesenteric ganglion to hindgut. Thigh point is fascial/neurologic, NOT anatomic (colon segment is not literally under your hand) — afferent shares spinal level, spinal level facilitates the IT band region. Clinical use: when abdomen unavailable (post-op dressing, open wound, severe guarding, modesty, can't lie supine) — thigh Chapman points = backup palpation site for colon dysfunction. Same test: firm, discrete, pea-sized tenderness. Apply rotary friction at posterior point if treating, or use thigh tenderness as viscerosomatic flag to push workup toward colon. "Second hand on same clock" hook: descending colon tenderness on medial thigh = SAME T12-L2 sympathetic level as descending colon tenderness in lumbar paraspinals — not a different reflex, same viscerosomatic clock face read at second location. Abdominal Chapman positive AND thigh Chapman positive = two confirmations of same segment, not two separate findings. 110 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Memory: Lateral=cecum/ascending(right,midgut,T10-11). Anterior=transverse(top,midgut,T10-11). Medial=descending(left,hindgut,T12-L2). Posterior=sigmoid(back/exit,hindgut,L1-L2). "Surface picks the segment; embryologic division picks the spinal level." Clinical fit note: adult diverticulitis is overwhelmingly SIGMOID — posterior thigh Chapman point relevant here. KEY QUIZ TEACHING POINTS - Cholelithiasis pt with T7-T9 right paravertebral changes = Viscerosomatic reflex from gallbladder afferents (organ fires first, spine reacts — the diagnostic direction). NOT somatovisceral (can't cause gallstones), NOT C3-C5 (that's for shoulder tip pain specifically via phrenic), NOT causing new stone formation (facilitated segments alter organ tone/blood flow, don't manufacture stones). - Appendicitis periumbilical pain before RLQ localization: explained by midgut-derived visceral afferents converging at T10 (periumbilical) — NOT phrenic nerve, NOT L1-2 somatic (that explains LATER RLQ localization once parietal peritoneum inflames, which carries somatic sharp pain), NOT T4-5 somatovisceral. - Chronic T5-T9 SD + recurrent PUD, physician treats thoracic dysfunction = Somatovisceral reflex (treating spine to reduce facilitated efferent output to stomach) — treating the SPINE to change organ function = somatovisceral logic (vs viscerosomatic = organ creates spinal findings, the diagnostic direction). - Bilateral T10-L1 changes + microscopic hematuria = Viscerosomatic reflex from renal/ureteral afferents (kidney fired first, spinal findings are the reaction; hematuria requires actual urinary tract pathology, cannot be caused by somatovisceral reflex). - Bilateral T10-L2 SD + sacral S2-S4 restriction + recurrent cystitis/endometriosis = reflects Uterus/Bladder (dual innervation: T10-L2 sympathetic via hypogastric nerve + S2-S4 parasympathetic via pelvic splanchnic nerves). Single-territory only organs: kidney (T10-L1 only), ovary (T10-T11 only), appendix (T10 only). Sacral findings specifically point to S2-S4 parasympathetic territory: bladder, uterus, rectum. - Facilitated T4-5 segment persists after angina medically managed because: repeated afferent visceral bombardment lowers synaptic threshold at dorsal horn permanently, creating sustained neural excitability INDEPENDENT of ongoing visceral input (functional change, not structural cord damage, not muscle anatomy issue, not irreversible hyperreflexia). - Chronic prostatitis + bilateral L1-L3 changes, physician treats L1-L3 to reduce sympathetic efferent tone = Somatovisceral reflex (treating spine to reduce facilitated efferent output to prostate) — note: the ORIGINAL finding getting there was viscerosomatic, but the TREATMENT DIRECTION described is somatovisceral. 111 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - Distinguishing viscerosomatic finding from primary somatic dysfunction: the finding PERSISTS OR RECURS despite appropriate OMT AND correlates with constitutional symptoms/organ-specific history (primary somatic dysfunction responds to OMT and stays better; viscerosomatic recurs because organ keeps re-facilitating the segment). TART criteria present in BOTH — doesn't distinguish source. Dermatomal pattern ≠ viscerosomatic mechanism (viscerosomatic follows sympathetic territory maps, not dermatomes). MEMORY HOOKS - T5-T9 = stomach/gallbladder/liver: "Foregut Five-Nine" — foregut becomes stomach, duodenum, liver, gallbladder; foregut = T5-T9 via greater splanchnic nerve. Epigastric pain + right T7-T9 = gallbladder. Left T5-T9 = stomach/pancreas. - Viscerosomatic vs Somatovisceral direction: "Viscerosomatic = Organ Out" (organ sends signal OUT to spine = diagnostic). "Somatovisceral = Spine In" (spine sends signal IN to organ = therapeutic rationale). Treating spine to improve organ function = somatovisceral thinking. Reading spine to diagnose organ disease = viscerosomatic thinking. - Why facilitated segment keeps firing after organ heals: "hair-trigger gun" — repeated afferent bombardment permanently lowers dorsal horn firing threshold; segment fires from inputs that wouldn't trigger a normal segment (Korr: "spinal cord learning to be hypersensitive"). OMM treatment is the intervention that targets the threshold itself. 112 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Autonomic Spinal Levels AUTONOMIC NERVOUS SYSTEM FOR OMM — SYMPATHETIC SPINAL LEVELS, PARASYMPATHETIC CRANIAL/SACRAL, SPLANCHNIC PATHWAYS. THE MAP UNDER EVERY VISCEROSOMATIC FINDING AND ANS-TARGETED TECHNIQUE. CORE CLUE: Every organ has TWO drivers. Sympathetic wires in from thoracolumbar spine (T1-L2). Parasympathetic wires in from cranial nerves + S2-S4. OMT taps the WIRE (spinal segment/cranial nerve), not the organ itself. SNS = Thoracolumbar (T1-L2 only), "fight or flight" gas pedal. Origin: IML (intermediolateral cell column) of T1-L2 ONLY. Short pre-ganglionic, long post-ganglionic. Postganglionic transmitter = norepinephrine (except sweat glands: ACh). Chain ganglia hug the rib heads. PSNS = Craniosacral (CN III, VII, IX, X + S2-S4), "rest and digest" brake. Origin: brainstem nuclei + sacral cord. Long pre-ganglionic, short post-ganglionic. Postganglionic transmitter = acetylcholine. Vagus does most viscera; pelvic splanchnics finish the colon. BOARD PEARL: Spinal sympathetic outflow STOPS at L2. Anything below L2 that "looks" sympathetic = fibers from lumbar chain riding caudally — the cord itself NEVER sends a sympathetic fiber out below L2. A stem saying "preganglionic sympathetic from L4" is WRONG on its face. Memory hooks: SNS = Thoracolumbar ("stress lives in the thorax" — T1 starts gas pedal at heart, L2 is last fiber out). PSNS = Craniosacral sandwich (brainstem top, sacrum bottom, sympathetic in middle; vagus = long arm reaching to splenic flexure). "Pay 1974" rule = CN 3,7,9,10 are the ONLY cranial nerves with parasympathetic fibers. FOUR-QUESTION ALGORITHM for every ANS stem: (1) What organ is mentioned? (2) Sympathetic level for that organ? (3) Parasympathetic source (vagus or pelvic)? (4) Which OMT calms or fires the matching wire? SNS levels track the embryologic gut tube: Foregut T5-T9, Midgut T10-T11, Hindgut T12-L2. Heart is its own beast at T1-T5. Bladder splits: SNS T11-L2 (storage), PSNS S2-S4 (voiding). SPLANCHNIC NERVES (SNS pre-ganglionic shipping lanes) — pre-ganglionic fibers exit cord, pass STRAIGHT THROUGH chain ganglia WITHOUT synapsing, form named splanchnic nerves traveling to abdominal ganglia: - Greater splanchnic (T5-T9): passes through chain, pierces diaphragm, synapses in CELIAC ganglion. Post-gang innervates foregut: stomach, liver, gallbladder, spleen, duodenum (to ligament of Treitz), pancreas. - Lesser splanchnic (T10-T11): synapses in SUPERIOR MESENTERIC ganglion. Serves midgut: distal duodenum to splenic flexure (jejunum, ileum, ascending colon, proximal 2/3 transverse colon). 113 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Least splanchnic (T12): + Lumbar splanchnic (L1-L2) → synapse in AORTICORENAL/INFERIOR MESENTERIC ganglion. Serve hindgut/kidneys: descending colon, sigmoid, rectum, bladder, repro, kidney/ureter. BOARD TRAP — Sacral Splanchnic vs Pelvic Splanchnic: Sacral splanchnics = SYMPATHETIC fibers from lumbar chain riding down (NOT parasympathetic despite the name). Pelvic splanchnics = PARASYMPATHETIC fibers from S2-S4 (aka nervi erigentes). Names nearly identical — classic board trap. "Pelvic = parasym. Sacral = sym." Note: if stem describes early periumbilical appendicitis pain, that's referred sympathetic from T10-T11 MIDGUT — the cord (not the appendix) decides where it hurts. PARASYMPATHETIC: cranial + sacral ONLY. Four cranial nerves carry PSNS: CN III, VII, IX, X. - CN III (oculomotor): Edinger-Westphal nucleus → ciliary ganglion → iris constrictor (pupil constriction). Lose CN III PSNS → pupil blows wide open (classic uncal herniation sign). - CN VII (facial): lacrimal gland (weep) + submandibular/sublingual glands (dribble/saliva). - CN IX (glossopharyngeal): parotid gland (spit/saliva), via otic ganglion. - CN X (vagus): does MOST viscera down to splenic flexure. Mnemonic "Spit, weep, dribble": CN VII = weep (lacrimal) + dribble (submandibular/sublingual); CN IX = spit (parotid). All cholinergic muscarinic — block them → dry eyes, dry mouth. THE VAGUS/PELVIC HANDOFF (single most testable PSNS fact): Vagus drives EVERYTHING above the splenic flexure. Pelvic splanchnics (S2-S4) take over from splenic flexure DOWN (descending colon, sigmoid, rectum, bladder, lower GU, reproductive organs). Cauda equina injury → lose pelvic splanchnics → neurogenic bladder/bowel below that line. "Trouble emptying bladder after sacral fracture" = S2-S4 problem, NOT vagus (vagus never had that turf). Mnemonic: Vagus = "from the brain to the bowel" — then it STOPS at splenic flexure (the brick wall); below that, a different PSNS line builds out of the sacrum. ASTHMA + VAGUS: Vagus drives bronchoconstriction + mucus secretion. Asthma = functionally a parasympathetic-skewed bronchospasm. Sympathetic fibers (T2-T7) bronchodilate via beta-2 receptors. Every asthma OMT picks rib raising (calm SNS chain, balance autonomic teeter-totter) PLUS suboccipital release (modulate vagus). VISCEROSOMATIC REFLEX MECHANISM: visceral afferent fires up SAME spinal segment as sympathetic outflow → cord sensitizes somatic side at that segment → palpable tissue texture change, hypertonicity, skin temperature shift in paraspinal region (one to two finger-widths off midline at segment level). Acute: boggy, edematous, warm, red, sweaty paraspinal tissue. 114 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Chronic: ropy, fibrotic, cool, dry, pale paraspinal tissue. Findings PERSIST after visceral problem resolves in chronic cases — "read it like a fingerprint." Decision rule: stem describes organ symptom → ask "what SNS spinal level?" → check that paraspinal segment. The answer IS the level from the spinal map, not the organ itself. ANTERIOR CHAPMAN'S / VISCEROSOMATIC LEVEL TABLE (organ systems by region) - Upper GI (T-levels around T5-T9, classic T7 for gallbladder+liver): stomach, liver, GB, spleen, duodenum, portions of pancreas. T7 = MOST CLASSIC board level: right T7 paraspinal tenderness = cholecystitis viscerosomatic (also part of celiac axis for pancreas/liver). - Middle GI (T10-T11): parts of pancreas/duodenum, jejunum, ileum, ascending colon, proximal 2/3 transverse. - Lower GI (T12-L2): distal 1/3 transverse, descending colon, sigmoid, rectum. - Upper GU (T10-L1): kidneys, upper ureters, gonads. - Lower GU (T11-L2 + S2-S4): lower ureters, bladder. OMT TARGETS — "turn the dial up or down": DECREASE SYMPATHETIC TONE - Rib raising (T1-T12): paraspinal/costovertebral mobilization, direct contact on chain ganglia along rib heads. Workhorse for hospitalized patients with autonomic overdrive. Uses: post-op ileus, asthma exacerbation, hospitalized pneumonia, hypertensive urgency from autonomic dysregulation. - Paraspinal inhibition: sustained pressure (~90 sec) on hypertonic paraspinal tissue at involved segment — drains sensitization. - Thoracic soft tissue/lift: lengthens paraspinal mass, decongests chain. INCREASE PARASYMPATHETIC TONE - OA/AA/C2 release (suboccipital release): opens jugular foramen region, modulates vagal tone. Used for visceral PSNS upregulation ABOVE splenic flexure (e.g., upper-GI/post-vagotomy reflux). - Cranial techniques (CV4, vault hold, V-spread): restore inherent rhythm, tip autonomic balance toward PSNS. - Sacral rocking (S2-S4): gentle rhythmic sacral motion addressing pelvic splanchnic tone. Pick for descending colon constipation, urinary retention, pelvic-floor dysfunction (e.g., elderly post-op constipation). ABDOMINAL GANGLION INHIBITION (sustained anterior abdominal pressure over named ganglion, calms post-ganglionic SNS firing): 115 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - Celiac ganglion — Spinal source T5-T9 — Target: Foregut (stomach to mid-duodenum, liver, gallbladder, pancreas, spleen). Location: just below xiphoid, lateral to midline. - Superior Mesenteric ganglion — T10-T11 — Target: Midgut (distal duodenum to splenic flexure). - Inferior Mesenteric ganglion — T12-L2 — Target: Hindgut (descending colon, sigmoid, rectum, bladder). MASTER OMT-MATCHING RULE: OMT picks track AUTONOMICS, not muscles. Hypersympathetic organ → rib raising (T1-T12, calm SNS chain) or ganglion inhibition over matching collateral (celiac=foregut, SMG=midgut, IMG=hindgut). Hypoparasympathetic organ above splenic flexure → suboccipital release/OA decompression (vagus). Below splenic flexure → sacral rocking (S2-S4 pelvic splanchnics). "Match the lever to the level." QUIZ STRATEGY TIP: read the last sentence first. "Which paraspinal level?" → map organ to SNS segment (foregut T5-T9, midgut T10-T11, hindgut T12-L2, head/neck T1-T4, heart T1-T5, lungs T2-T7, kidneys T10-T11 [pathway detail: T10-L1 overall with kidney/ureter], ureters T10-L1, uterus T10-L2). "Which OMT?" → match the autonomic line. Cross out any sympathetic answer below L2 or parasympathetic answer between splenic flexure and S2 — "the cord can't break its own rules." KEY VIGNETTE TEACHING POINTS (high-yield facts extracted) - Inferior MI + boggy/edematous LEFT paraspinal T2-T4 + ST elevations II/III/aVF: mechanism = visceral afferent from heart enters cord at T1-T5, sensitizes same somatic segment (viscerosomatic, NOT mechanical compression, NOT vagal [vagus goes to brainstem not paraspinal dermatomes], NOT phrenic [phrenic = shoulder via Kehr sign, not paraspinal]). - Chronic constipation + ropy/fibrotic LEFT T11 paraspinal tissue: source = distal transverse colon at splenic flexure (midgut/hindgut transition, T10-T11 via lesser splanchnic to SMA ganglion). NOT esophagus (upper thoracic), NOT sigmoid/rectum (hindgut = T12-L2). - Dyspepsia + right-sided T6-T8 hypertonicity: best OMT target = Celiac ganglion inhibition (foregut T5-T9 via greater splanchnic). NOT IMA (hindgut), NOT S2-S4 (pelvic), NOT stellate (head/neck/heart/UE only). - Descending colon PSNS source = Pelvic splanchnic nerves S2-S4 (aka nervi erigentes) — NOT vagus (stops at splenic flexure), NOT "sacral splanchnic" (that's SYMPATHETIC, classic trap), NOT greater splanchnic (SNS to foregut). - POD#3 ileus, OMT plan for BOTH SNS+PSNS components = Rib raising T5-T12 (reduce SNS overdrive) PLUS sacral rocking + OA release (increase PSNS tone). NOT single-modality answers. - Structure receiving DIRECT preganglionic sympathetic innervation (T10) with NO intermediate ganglion synapse = Adrenal medulla (chromaffin cells are functionally postganglionic neurons/neural-crest derived; T10 preganglionic fiber skips chain AND collateral ganglia, synapses directly, triggers epi/norepi release). Standard organs (liver, stomach) use the normal TWO-neuron pattern via celiac ganglion. 116 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - Asthma bronchospasm, best rib raising target = T2-T7 (lung sympathetic outflow). NOT T5-T9 (foregut), NOT T10-L2 (lower viscera/LE), NOT C2-C7 (no cervical IML — SNS outflow starts at T1; cervical chain ganglia are fed by ascending fibers from upper thoracic). - Chronic kidney stones + ropy/fibrotic LEFT T11-L1: pathway = T10-L1 sympathetics via least splanchnic + lumbar splanchnic → renal/aorticorenal ganglion. - Recurrent UTIs + S2-S4 tissue texture changes, sacral rocking + suboccipital release performed: primary target = Bladder (S2-S4 PSNS via pelvic splanchnics to detrusor). - Chronic migraines/facial flushing + T1-T2 changes, HVLA to upper thoracic: indirectly targets Superior Cervical Ganglion (SCG) — sympathetic preganglionic for head/face originates T1-T4, travels UP cervical chain, synapses in SCG; postganglionic fibers hitchhike on internal carotid artery to eye (pupil dilation), facial sweat glands, vasoconstriction. - Acute cholecystitis + right T5-T9 changes + Chapman point at right 6th intercostal space anteriorly: mechanism = Greater splanchnic nerve (T5-T9), gallbladder is foregut derivative. - Dysmenorrhea/chronic pelvic pain + T12-L2 changes: ganglion receiving postganglionic sympathetic fibers to uterus = Inferior mesenteric ganglion + hypogastric plexus (uterus T10-L2, mostly T12-L2). - Why rib raising is applied over RIB ANGLES not transverse processes: sympathetic chain ganglia lie on the ANTEROLATERAL surface of vertebral bodies, directly deep to rib heads/costovertebral articulations — rib angles give mechanical leverage/access to the chain (chain is NOT in the epidural space, which is inside the vertebral canal; chain is outside, anterolateral). - Post-inferior-MI sinus bradycardia (HR 48), addressing PSNS overdrive component: OA release + suboccipital inhibition to normalize vagal tone to SA node (vagus provides PSNS to SA/AV nodes; post-MI vagal tone can increase excessively). 117 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Colonic Parasympathetic Viscerosomatic Reflexes OMM · VISCEROSOMATICS (DETAIL) Colonic Parasympathetic Viscerosomatic Reflexes — vagus vs pelvic splanchnics, and the limits of the somatic exam CORE ANATOMY — THE MIDGUT/HINDGUT PARASYMPATHETIC HANDOFF: Vagus nerve supplies the FOREGUT and MIDGUT, including cecum, ascending colon, and the PROXIMAL TWO-THIRDS of the transverse colon. Pelvic splanchnic nerves (S2-S4) supply the HINDGUT, beginning near the DISTAL ONE-THIRD of the transverse colon and continuing through descending colon, sigmoid colon, and rectum. KEY POINT: the parasympathetic handoff occurs WITHIN the transverse colon (not at the splenic flexure landmark alone, and NOT at the rectum) — proximal 2/3 = vagus, distal 1/3 onward = pelvic splanchnics. BOARD TRAP: physical proximity does not determine innervation — the distal transverse colon is close to the proximal transverse colon but is hindgut-derived and receives PELVIC splanchnic (not vagal) parasympathetic supply; the embryologic midgut-hindgut boundary determines the nerve, not physical location. CRITICAL DISTINCTION: PARASYMPATHETIC ORIGIN vs. VISCEROSOMATIC (THORACOLUMBAR) LEVELS — these answer DIFFERENT anatomy questions and must not be conflated: - Parasympathetic efferent supply: vagus (brainstem origin) for midgut; pelvic splanchnics (S2-S4) for hindgut. - Colonic nociceptive AFFERENTS and SYMPATHETIC efferents: organized through LOWER THORACIC and UPPER LUMBAR pathways, commonly summarized in osteopathic teaching around T10-L2 with regional overlap. BOARD RULE: "S2-S4 tells you where distal-colon parasympathetics originate; it does NOT force the paraspinal reflex finding to live over the sacrum" — the viscerosomatic (tenderness/hypertonicity) finding for colon pathology localizes via the SYMPATHETIC/afferent pathway (T10-L2 region), NOT via the parasympathetic nerve's own origin level. Don't assume a sacral finding for hindgut disease or a purely vagal-level finding for midgut disease — the somatic reflex tracks the sympathetic/visceral afferent organization, not the parasympathetic nerve. VISCEROSOMATIC REFLEX MECHANISM (sequence): (1) a colon process (distention, inflammation, ischemia, chemical irritation) activates visceral afferents. (2) Afferent input reaches shared spinal segments (nociceptive traffic commonly travels WITH sympathetic pathways to thoracolumbar levels). (3) Segmental excitability increases (repeated input can 118 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS FACILITATE interneuronal/motor responses — "segmental facilitation," a core osteopathic concept, cross-reference file 10_viscerosomatic-reflexes.txt). (4) Somatic findings appear: paraspinal hypertonicity, tenderness, tissue-texture change, altered motion, or referred discomfort. CRITICAL CAVEAT (repeated emphatically throughout this page): these somatic findings are NONSPECIFIC and must be interpreted AFTER the abdominal diagnosis is addressed — "the organ sends afferent traffic to the cord; the cord can answer through muscle and tissue, but the response is NOT disease-specific." A viscerosomatic finding CANNOT: diagnose a specific colon segment, identify cancer, distinguish ulcerative colitis from infection, or determine whether ischemia is present. It can only SUPPORT a regional examination hypothesis, alongside history, exam, labs, imaging, endoscopy, or surgery as appropriate. RISK-STRATIFIED OMT DECISION FRAMEWORK ("scale confidence down as the stakes rise" — the more dangerous the abdominal pattern, the LESS appropriate it is to infer from or treat through a somatic finding): - Stable chronic constipation after unrevealing medical evaluation → adjunctive structural care MAY be reasonable. - New persistent abdominal pain without peritoneal signs → no change to standard workup priority (structural care not yet appropriate as primary). - Fever, bloody stool, anemia, or progressive weight loss → emergency/urgent pathology takes priority. - Rigid abdomen, shock, obstipation, or rising lactate → emergency pathology takes ABSOLUTE priority. KEY RULE: "Red flags do not merely LOWER confidence in OMT; they REMOVE OMT from the first-line decision entirely." OMT must NEVER delay resuscitation, antibiotics, imaging, endoscopy, decompression, anticoagulation decisions, oncologic evaluation, or operative source control. A NORMAL somatic exam does NOT lower the urgency of a red-flag abdomen. WHEN ADJUNCTIVE OMT IS APPROPRIATE: only for a STABLE patient with a completed medical evaluation and DOCUMENTED somatic dysfunction — e.g., stable functional constipation, gentle treatment of relevant lumbar/pelvic/diaphragmatic/rib mechanics as an adjunct to hydration, fiber, medication, activity, pelvic-floor care, etc. Treatment goal = address the DOCUMENTED somatic dysfunction, pain, respiratory mechanics, or mobility — NOT to claim the technique cures IBD, obstruction, ischemia, cancer, or infection (exceeds the evidence/clinical role of OMT). Direct muscle energy requires patient cooperation and is AVOIDED when positioning, contraction, fracture risk, instability, severe pain, or underlying disease makes the maneuver unsafe. REASSESSMENT PRINCIPLE: reassess clinical benefit using pain, motion, respiratory comfort, function, or bowel symptoms WHILE the medical diagnosis/follow-up plan remains ACTIVE. Lack of improvement should REOPEN the differential, not trigger increasingly forceful 119 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS treatment. BOUNDARY STATEMENTS (true/false claims explicitly addressed) - "T10-L2 tenderness proves sigmoid disease" → FALSE (the finding is nonspecific, does not map one-to-one to a distal colon diagnosis; use the complete abdominal history/workup). - "S2-S4 identifies distal-colon parasympathetic origin" → TRUE as an anatomic statement about pelvic splanchnic outflow, but it is NOT a disease-localization test by palpation. - "OMT can accompany treatment of stable functional constipation" → reasonable when red flags are excluded and the role remains adjunctive; continue evidence-based medical management. - "OMT can replace imaging for suspected obstruction" → FALSE; obstruction requires diagnostic and often surgical evaluation — delay can cause ischemia, perforation, sepsis. "The strongest osteopathic reasoning begins by admitting where the osteopathic examination stops." QUIZ / VIGNETTE HIGHLIGHTS - 37M, normal colonoscopy, no alarm features, purely anatomic question about ascending colon parasympathetic supply → Vagus nerve (ascending colon = midgut territory, vagal supply extends through the proximal two-thirds of the transverse colon; NOT pelvic splanchnics [that's hindgut/distal territory], NOT greater thoracic splanchnic [sympathetic, not parasympathetic], NOT lumbar sympathetic chain, NOT pudendal nerve [somatic, perineal]). - 44M, reviewing autonomic anatomy before sigmoid colon/upper rectum surgery, asks which PREGANGLIONIC PARASYMPATHETIC pathway reaches this hindgut territory → Pelvic splanchnic nerves from S2-S4 (sigmoid/rectum = hindgut; NOT vagus [midgut/foregut only], NOT greater thoracic splanchnic T5-T9 [sympathetic, wrong division], NOT phrenic C3-C5 [diaphragm], NOT ilioinguinal L1 [somatic sensory]). - Student claims the DISTAL transverse colon must receive vagal input "because it's physically close to" the proximal transverse colon → INCORRECT reasoning; correct statement = vagus supplies the proximal TWO-THIRDS of the transverse colon, pelvic splanchnics supply the distal ONE-THIRD (the handoff occurs WITHIN the transverse colon, NOT at the rectum, and NOT determined by physical proximity — embryologic midgut/hindgut boundary is what matters). - 29M established ulcerative colitis, flare with bloody diarrhea + abdominal pain, ALSO has lower thoracic/upper lumbar paraspinal hypertonicity, hemodynamically stable, stool testing/inflammatory treatment underway → correct interpretation of the paraspinal finding = it CAN represent a nonspecific viscerosomatic response but does NOT diagnose the disease or replace flare evaluation (NOT "proves inflammation isolated to sigmoid," NOT "proves the flare is caused by a lumbar somatic dysfunction" [reverse causation error], NOT "excludes infectious colitis," NOT "eliminates need for stool testing/medication" — a viscerosomatic finding can ACCOMPANY bowel disease; it cannot REPLACE the bowel diagnosis or workup). 120 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - 51M chronic functional constipation, normal labs, no weight loss/blood/vomiting, recent workup excluded obstruction/structural lesion, exam shows restricted lumbar/sacral motion with reproducible mechanical discomfort → most defensible OMT use = adjunctive treatment of the DOCUMENTED somatic dysfunction WHILE CONTINUING the evidence-based constipation plan (NOT using OMT as the SOLE treatment/stopping the bowel regimen, NOT claiming the sacral finding "proves pelvic splanchnic nerve failure," NOT forceful treatment despite severe positioning pain, NOT assuming all FUTURE constipation is benign just because THIS workup was reassuring). - 72M atrial fibrillation, ABRUPT severe abdominal pain OUT OF PROPORTION to exam, vomiting, bloody stool, metabolic acidosis, RISING LACTATE, plus an incidental lower thoracic somatic finding → correct next step = URGENT vascular/surgical evaluation for MESENTERIC ISCHEMIA with resuscitation and definitive imaging (AFib = embolic risk factor; pain-out-of-proportion + bloody stool + rising lactate = classic mesenteric ischemia red-flag triad). Explicitly WRONG: treating the thoracic dysfunction first and reassessing lactate afterward, diagnosing benign constipation because the abdomen is initially soft, using the paraspinal LEVEL to try to localize which colon segment is ischemic (viscerosomatic findings cannot localize this precisely), or discharging based on brief symptom improvement with positioning. "When ischemia is plausible, the viscerosomatic finding is background noise and the CTA clock is running." MEMORY HOOKS - Vagus = midgut (cecum → proximal 2/3 transverse colon). Pelvic splanchnics (S2-S4) = hindgut (distal 1/3 transverse colon → rectum). The handoff is WITHIN the transverse colon, not at a colon flexure or the rectum. - Parasympathetic ORIGIN (vagus=brainstem, pelvic splanchnics=S2-S4) is a DIFFERENT anatomy question from the VISCEROSOMATIC/sympathetic-afferent organization level (T10-L2 for the colon broadly) — don't force a sacral somatic finding just because the parasympathetic supply to that gut segment is sacral. - A viscerosomatic finding is NEVER disease-specific — it supports a hypothesis, it never diagnoses, localizes precisely, or excludes systemic/infectious/malignant causes. - "Red flags REMOVE OMT from the decision, they don't just lower confidence in it" — the organizing clinical-safety principle of this whole topic. - Pain out of proportion + AFib (embolic risk) + rising lactate = mesenteric ischemia until proven otherwise; OMT/somatic findings are irrelevant to this decision point. 121 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS Lymphatic OMT: Pumps & Pathway Techniques OMM · LYMPHATICS (RESPIRATORY-CIRCULATORY MODEL) Lymphatic OMT: Pumps and Pathway Techniques ELITE-GATED PAGE — this file captures the full free-preview content, which was substantial; a note at the end flags what's behind the paywall: "the full board walkthroughs, elimination drills, and deeper mechanics" plus the clinical-vignette case bank beyond question 1. THE TWO-DUCT PLUMBING MODEL: only two terminal lymphatic pipes exist. - Right lymphatic duct: drains ONLY the right upper quadrant above the diaphragm (right head/neck, right arm, right thorax) — the "small" duct. Empties into the right subclavian/IJ junction. - Thoracic duct: drains EVERYTHING ELSE (~75% of the body) — both legs, abdomen/pelvis, left thorax, left arm, left head/neck. Begins at the cisterna chyli (L1), climbs through the aortic hiatus (T12) alongside the aorta through the posterior mediastinum, empties at the LEFT subclavian/IJ junction (left venous angle). Both ducts ultimately drain near the right atrium. Heart and lungs themselves drain to the right supraclavicular fascia (right duct) — NOT the thoracic duct, despite thoracic duct being anatomically closer. Diagnostic rule: the swollen body part tells you the blocked pipe. Right arm + right face only → right lymphatic duct. Both legs + left chest (sparing right arm/head) → thoracic duct. WORKED EXAMPLE: 61M, progressive facial + bilateral leg + left chest wall swelling over 3 weeks, RIGHT arm/head spared, posterior mediastinal mass on CXR → Thoracic duct obstruction (matches ~75% distribution exactly; right arm/head spared because that territory drains via the OTHER duct, which a thoracic-duct block cannot back up). EDEMA MECHANISM (three causes, only two create the leak, one prevents cleanup) 1. Hydrostatic pressure ↑ (push) — e.g., heart failure. 2. Oncotic (protein) pressure ↓ (pull) — e.g., nephrotic syndrome, cirrhosis. 3. Lymphatic drainage blocked (cleanup pipe fails) — the leaked protein piles up in tissue (this is the THIRD edema mechanism, distinct from the first two). PITTING RULE: watery/low-protein edema (heart failure, nephrotic syndrome) = PITS. Protein-rich edema (lymphatic blockage, filariasis, post-mastectomy) = NON-pitting, grabs the toes (positive Stemmer sign — cannot tent skin over the 2nd toe). Mechanism: protein holds its shape; water runs away from thumb pressure. OMM/AUTONOMIC HOOK: Lymphatic vessels are ADRENERGIC — sympathetics SQUEEZE them shut (thoracic duct + terminal lymphatics carry sympathetic/adrenergic innervation with 122 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS no reliable parasympathetic supply). High sympathetic tone constricts terminal lymphatic vessels and chokes flow. This is WHY OMM treats facilitated segments (rib raising) to decompress lymphatics — calming sympathetics widens the lumen and increases flow. Mnemonic: "sympathetics = a hand on the hose." GUT-FAT HOOK: Lacteals = the gut's lymphatics; carry FAT. Long-chain fats → packaged into chylomicrons → enter lacteals → become chyle → drain via thoracic duct as milky lymph. Medium-chain fats SKIP lacteals, ride albumin straight to the portal vein instead. Drug hook: ezetimibe does NOT block lacteals — it blocks NPC1L1 at the intestinal brush border to lower cholesterol absorption (common wrong-mechanism distractor). TREATMENT SEQUENCE (THE SINGLE MOST TESTED RULE ON THIS TOPIC) — "open the pathway, then move the fluid": 1. Thoracic inlet release (Sibson's fascia) FIRST — "break the dam." Both ducts pass through the thoracic inlet; a restriction here can cause whole-body swelling because both pipes are pinched. Treating anything downstream first just backs up against a closed door. 2. Dome the diaphragm — the diaphragm is the engine of the two-chambered pump: inhalation creates negative thoracic + positive abdominal pressure, sucking lymph upward through the thoracic duct. Restoring diaphragmatic excursion moves lymph with every breath. 3. Lymphatic pumps (Miller thoracic, pedal, etc.) — NOW actively promote flow. 4. Chapman points LAST — only after pelvis and leg lengths are balanced. BOARD TRAP: "pump before you open [the inlet]" — pumping before releasing the thoracic inlet just backs fluid up against a closed door; sequence order is heavily tested. NAMED PUMPS/TECHNIQUES (setup | dose | indication | contraindication) - Miller Thoracic Pump: supine, hands on anterior chest wall; rhythmic compress/release ~2 cycles/sec over several breaths; indicated for pneumonia, infection, rales, productive cough, lung congestion (used AFTER the inlet is open — this is the "lung's lymphatic technique"). CONTRAINDICATED: metastatic cancer (can seed tumor via lymphatics — the classic board trap), rib/spinal fracture, lymphatic-system malignancy, osteoporosis (relative). - Pedal Pump (Dalrymple): supine, operator at feet; rhythmic dorsiflexion/oscillation sending a wave through legs/trunk; the WHOLE-BODY general lymphatic pump — indicated for general congestion, lower-extremity edema, fluid return. CONTRAINDICATED: osteonecrosis/acute fracture/dislocation in the limb (e.g., great-toe osteonecrosis under your contact — board trap), unstable cardiac condition, moderate-to-severe CHF. - Abdominal Pump: hands on upper abdomen, follows respiration; rhythmic compression paced to breathing; directly massages the CISTERNA CHYLI (thoracic duct's L1 reservoir) — indicated for GI dysfunction, CHF, COPD/asthma, URI. CONTRAINDICATED: rib/spinal fracture, traumatic liver/spleen disruption, full stomach, nearby surgical incision, lymphatic malignancy. Board trap: can aggravate GERD — use caution in reflux. 123 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - Galbreath Technique (ENT/mandibular drainage): supine, head turned, gentle traction along the mandible; part of the ENT sequence — indicated for recurrent otitis media, Eustachian/middle-ear/sinus drainage, URI. CONTRAINDICATED: recent mandibular fracture (the single trap). - Pectoral Traction: operator at head, grips anterior axillary folds, sustained lateral traction while patient breathes; stretches pec minor to free chest/arm drainage — indicated for upper-extremity lymphatic congestion, mild dyspnea/wheeze, reactive airway disease (augments the thoracic pump). CONTRAINDICATED: near a surgical wound (e.g., recent mastectomy site — board trap). - Rib Raising: finger pads on costotransverse area, anterior lifting pressure, sustained/rhythmic; THE AUTONOMIC MOVE — calms overactive sympathetics, which decompresses adrenergic terminal lymphatics and lets vessels open (increases rib excursion, promotes venous/lymphatic return); indicated for URI, post-op. CONTRAINDICATED: standard spinal precautions (acute fracture, instability). THE UNIVERSAL "DO-NOT-PUMP" LIST (the do-not-treat theme tying all pumps together): malignancy (especially metastatic — risk of seeding tumor via lymphatics), fracture/osteonecrosis/acute trauma AT the contact point, unstable cardiac status/moderate-severe CHF (for whole-body pumps). Additional specifics: doming the diaphragm is contraindicated with a full stomach or AAA/pulsatile mass (rupture risk — image first) but is FINE in pregnancy (board trap — pregnancy is NOT a contraindication to diaphragm doming). Galbreath contraindicated with recent mandibular fracture. Cervical chain drainage relatively contraindicated with carotid disease, tender reactive nodes, or bradyarrhythmia. Mnemonic: "Cancer, broken bone, crashing heart. Plus: full stomach or AAA stops the diaphragm (not pregnancy)." LYMPH PATHOLOGY — FOUR BOARD-FAVORITE ENTITIES 1. Lymphedema: firm, non-pitting swelling that grabs the toes, positive Stemmer sign. PRIMARY (inherited/congenital): Milroy disease, and Turner syndrome (failed fetal lymph drainage → cystic hygroma → webbed neck + newborn non-pitting hand/foot edema — "Turner chain"). SECONDARY (acquired): post-mastectomy with axillary node dissection, radiation, or filarial infection (Wuchereria = elephantiasis). LATE COMPLICATION: chronic post-mastectomy lymphedema can develop cutaneous angiosarcoma (Stewart-Treves syndrome). VS. CHRONIC VENOUS INSUFFICIENCY: CVI PITS, improves overnight, spares the toes, stains the medial ankle — lymphedema is firm/persistent and involves the toes. 2. Lymphangitis: flat red area with a red streak tracking proximally (bacteria crawling UP the lymphatic channel). BUG: Group A Strep (S. pyogenes) — mnemonic "LINES" (Lymphangitis, Impetigo, Necrotizing fasciitis, Erysipelas, Scarlet fever) for strep-associated conditions. WHY STREP MAKES A LINE: strep follows channels (linear spread); staph spreads sideways through tissue via enzymes (circular spread = cellulitis). NODULAR VARIANT: ascending nodular lymphangitis after a thorn prick = Sporothrix schenckii ("rose gardener's disease"), treat with itraconazole. 124 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS 3. Lymphadenopathy (red-flag node locations): Supraclavicular nodes = highest malignancy risk; LEFT supraclavicular = Virchow node = abdominal/GI cancer until proven otherwise. Epitrochlear node (near medial elbow, drains ulnar forearm/hand) — palpable is ABNORMAL, workup if persistent without infection/systemic cause. Inguinal nodes often reactive (low biopsy yield) — biopsy only if hard/fixed/very large/persistent/with systemic signs. Sister Mary Joseph node (periumbilical) = intra-abdominal cancer. Testes/ovaries drain to PARA-AORTIC nodes, NOT inguinal (common trap). Spread rule: carcinomas spread by lymphatics, sarcomas spread by blood ("CLaSH"). Sentinel node = first node draining a tumor (breast = axillary). 4. Chylothorax: milky, triglyceride-rich pleural fluid (an EXUDATE) from thoracic duct rupture/obstruction — trauma, surgery, or malignancy (classically lymphoma). BUZZ CASE: teen with abdominal mass just left of umbilicus + chylous effusion + "starry sky" biopsy = Burkitt lymphoma invading the duct/cisterna chyli. Board reflex: "disruption of the thoracic lymphatic duct" on a pleural effusion question → think cancer. DIAGNOSTIC ALGORITHM (case walkthrough): 58F, 14 months post left mastectomy + axillary node dissection, firm left arm swelling → first branch point: does it PIT or is it NON-pitting? (Non-pitting/protein-rich → post-mastectomy lymphedema pathway, consistent with the lymphedema section above.) QUIZ HIGHLIGHT (only 1 of 5 quick-call questions and 1 of 11 case-bank vignettes visible in free preview before the Elite paywall): - 6M, 5 days productive cough, RLL pneumonia, T 38.6°C, focal consolidation + rales on CXR, AFTER releasing the thoracic inlet — which technique most specifically mobilizes lung lymphatics? → Miller thoracic pump (matches its stated indication for pneumonia/rales/productive cough, applied after the inlet is opened per the treatment sequence rule). [NOTE: the remainder of this quiz bank (questions 2-5) and the 11-case clinical vignette bank are gated behind the Elite subscription ($9.99/month) and were not accessible.] MEMORY HOOKS - "RIGHT duct = the small one, just the Right Upper corner. Thoracic = the big 75% pipe for everyone else." - Sequence: "Open the door [thoracic inlet], start the engine [diaphragm], pump the fluid [named pumps], Chapman last." Pump-before-open is the trap. - "Sympathetics = a hand on the hose" — calming sympathetic tone (rib raising) opens adrenergic terminal lymphatics. - Pitting = watery/low-protein; Non-pitting = protein-rich (grabs the toes, Stemmer sign). - "Cancer, broken bone, crashing heart" = universal do-not-pump list; diaphragm doming is also stopped by full stomach/AAA but NOT by pregnancy. - Strep lymphangitis makes a LINE (follows channels); staph cellulitis makes a CIRCLE (spreads through tissue). 125 OMM / OMT BOARD REVIEW PART 5 — VISCEROSOMATICS, AUTONOMICS & LYMPHATICS - Virchow node (left supraclavicular) = GI/abdominal cancer; Sister Mary Joseph node (periumbilical) = intra-abdominal cancer; epitrochlear node palpable = abnormal. - Carcinomas spread by lymphatics, sarcomas spread by blood — "CLaSH." 126 PART 6 — CRANIAL OSTEOPATHY PART 6 CRANIAL OSTEOPATHY IN THIS PART Cranial PSNS Techniques Cranial Strain Patterns (SBS) Cranial Dysfunctions (PRM, Five Strains, Deep Anatomy) 127 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Cranial PSNS Techniques CRANIAL PSNS TECHNIQUES — VAULT HOLD, V-SPREAD, CV4, SPHENOPALATINE RELEASE, SUBOCCIPITAL DECOMPRESSION (CALMS VAGUS). WHY THESE EXIST: Four cranial nerves (CN III, VII, IX, X) carry parasympathetic fibers out of brainstem, squeezing through tiny bony exits. Compress exit = choke nerve. Open exit = nerve glides. Nuclei in brainstem, fibers exit through skull, endings drive pupil, glands, heart, lung, gut (down to splenic flexure). PATHWAY TEMPLATE (same for all 4 PSNS cranial nerves): Brainstem nucleus → cranial nerve → ganglion → target organ. - CN III → ciliary ganglion → Pupil/lens - CN VII → pterygopalatine ganglion (PPG) → Tears/nose; submandibular ganglion (SMG) → Submandibular/sublingual glands - CN IX → otic ganglion → Parotid (spit) - CN X → terminal ganglia in organ wall → Heart, lung, gut down to splenic flexure THE FIVE TECHNIQUES 1. VAULT HOLD — diagnostic listening hand; treatment is by INTENT not push. Indication: diagnose strain patterns, palpate CRI (cranial rhythmic impulse, ~10-14 cycles/min, slow/gentle/biphasic, felt as flexion-extension whisper through bone), assess flexion vs extension dysfunction. Hand placement (5-finger): Index on greater wings of sphenoid. Middle on temporals. Ring on parietals. Fifth on occipital squama. Thumbs crossed overhead, not on head. Technique: Listen, do NOT push. Note rate/amplitude/symmetry of CRI. Indirectly treat by intent: hold cranium toward its still point until tissue releases. Endpoint: still point arrives, then rhythm restarts broader/more symmetric. Contraindications: skull fracture, recent intracranial hemorrhage, increased ICP, acute severe TBI. 2. V-SPREAD (Sutural Spread) — aim fluid wave at stuck suture from across skull. Indication: focal sutural restriction, cranial nerve foramen compression, sinus drainage assist (maxillary/sphenoid sutures), post-traumatic suture binding. 128 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Hand placement: V (index+middle) on side OPPOSITE the restricted suture, fingertips pointing AT the suture. Other hand (drive hand) sits on directly opposite side of skull as fluid driver. Technique: drive hand pumps gentle fluid wave across cranium toward the V; V "catches" wave, suture spreads under fingertips. Endpoint: tissue release at suture; patient often reports immediate symptom shift (sinus pop, drainage, pressure relief). Contraindications: skull fracture, recent ICH, increased ICP, infection at contact site. 3. CV4 (Compression of 4th Ventricle) — classic parasympathetic-boosting still point; cradle occiput, ride to silence. Hand placement: Bilateral hypothenar eminences cradle occipital squama, MEDIAL to occipitomastoid sutures. Thumbs touch/interlace overhead. Do NOT contact suboccipital muscles. Indication: fever, congestion, sinusitis adjuvant, autonomic dysregulation, sleep disturbance, tension headache. Considered strongest cranial parasympathetic boost. Technique: During cranial flexion, gently follow. During extension, RESIST. Encourage compression, discourage extension, until still point arrives. Hold quietly, release. Endpoint: still point felt; patient often sighs, warms, breathes deeper; CRI restarts broader/symmetric (increased amplitude = textbook outcome). Contraindications: Absolute — skull fracture, recent ICH, acute stroke, increased ICP, severe TBI. Relative — pregnancy uncertainty, active seizure disorder. Physiological significance of still point: sustained hydraulic input to 4th ventricle area where key autonomic centers reside (dorsal motor nucleus of vagus, nucleus tractus solitarius, locus coeruleus) — proposed as parasympathetic reset shifting autonomic balance from sympathetic to parasympathetic dominance (NOT a sign of increased ICP, NOT evidence of suture fusion, NOT stopped CSF production). 4. SPHENOPALATINE GANGLION (SPG) RELEASE — reaches ganglion running lacrimal, nasal, palatine glands; opens sinus. Indication: sinusitis, vasomotor rhinitis, allergic congestion, refractory cluster/migraine headache (adjunct), post-concussive autonomic complaints. Hand placement: Modern preference = extra-oral (gloved fingertip pressure on lateral face just inferior to zygomatic arch, aiming toward pterygopalatine fossa). Intranasal cotton applicator and intra-oral contact (finger to pterygoid plate) also taught, require explicit consent. Technique: gentle sustained pressure 30 sec to 2 min; wait for tissue softening; patient may report drainage relief, nasal pop, eye watering as ganglion fires. Endpoint: tissue release, immediate symptom shift (drainage, pressure relief, watery eyes). 129 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Contraindications: active oral/facial infection, recent maxillofacial surgery, gag intolerance (intra-oral route), fracture of sphenoid or maxilla. 5. OA/SUBOCCIPITAL DECOMPRESSION — vagus exits at jugular foramen just inside occiput; free that floor, free vagal tone. Indication: tension headache, vagal under-tone (functional GI, gastroparesis, constipation), neck tension, post-concussive vagal complaints, asthma adjunct (modulates vagal bronchoconstriction). Hand placement: patient supine, physician seated at head of table, finger pads slip just under inferior nuchal line bilaterally, skull rests on fingertips. For OA: add gentle sidebending+rotation to engage barriers. For AA: pure rotation. Technique: sustained slow pressure 1-3 min; skull settles as suboccipital muscles release; theoretical effect = reduce tension on dura/jugular foramen exit, freeing vagal nerve glide. Endpoint: muscle release under fingertips; parasympathetic shift (deeper breathing, sigh, occasional yawn). Contraindications: C1-C2 instability (Down syndrome, severe RA, Klippel-Feil), vertebral artery dissection history/VBI symptoms (dizziness/syncope on cervical motion), acute cervical fracture. GERD mechanism: releasing jugular foramen restores vagal parasympathetic outflow → improves lower esophageal sphincter tone + gastric motility (NOT hiatal hernia realignment, NOT cerebral blood flow, NOT phrenic nerve compression). SUPPORTING ROLES: Frontal lift opens superior orbital fissure (CN III, IV, V1, VI exits). Parietal lift addresses parietal restrictions. Temporal rocking influences CN VII (internal acoustic meatus) and CN IX, X, XI (jugular foramen). Temporal rocking = "ear pull"/temporal bone decompression — gentle traction on ear to mobilize temporal bone; used for chronic vertigo/tinnitus with temporal bone rotation restriction. SYMPTOM → TECHNIQUE CHEAT GRID - Sinusitis adjunct: SPG release + V-spread (open maxillary sutures, fire ganglion driving lacrimal/nasal glands, add lymphatic pump) - Otitis media adjunct: Temporal rocking + Galbreath maneuver (temporal rocking influences eustachian drainage; Galbreath decompresses pharyngotympanic tube) - Tension headache: OA/suboccipital release (releases substrate causing posterior occipital headache) - Functional constipation: OA release + CV4 (vagal under-tone slows gut to splenic flexure; boost vagal output both routes) - Allergic rhinitis: SPG release + V-spread + lymphatic (drain sinus, calm ganglion driving mucosal secretion, move lymph) 130 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - Fever support: CV4 (classic teaching; still point recruits broader autonomic regulation — evidence thin, but board teaching firm) CONTRAINDICATIONS — ABSOLUTE LIST (every cranial technique): Skull fracture (acute/unhealed); recent intracranial hemorrhage or acute stroke; increased intracranial pressure; acute severe TBI/active coup-contrecoup; uncontrolled hydrocephalus; CSF leak or recent neurosurgery. Rationale for ICP contraindication: cranial techniques influence CSF flow, venous drainage patterns, and ICP dynamics through effects on cranial bone motion, dural membrane tension, and venous sinus caliber — can worsen intracranial hypertension. MEMORY HOOKS - Cranial PSNS = "3, 7, 9, 10": Edinger-Westphal (III) = pupil; superior salivatory (VII) = tears + submandibular spit; inferior salivatory (IX) = parotid spit; dorsal motor nucleus (X) = everything heart to splenic flexure. - CV4 = "cradle, compress, count to silence": cradle occiput, resist extension during cranial cycle, wait for still point (silence), done when rhythm restarts broader. - SPG = "the sinus thermostat": runs lacrimal, nasal, palatine glands — squeeze the right zone to shift sinus secretion (helps allergic rhinitis, sinusitis, cluster headache adjunctively). - "Bleeders, breakers, balloons" = 3 buckets of absolute contraindication: bleeders (recent ICH/stroke), breakers (skull fracture/severe TBI), balloons (raised ICP/hydrocephalus). Rule out each before touching the vault. KEY QUIZ/VIGNETTE TEACHING POINTS - SBS "right torsion" = sphenoid greater wing superior on right AND occipital squama inferior on right, both rotating around an ANTEROPOSTERIOR axis (opposite motion on each side is the hallmark of torsion, not a simple lateral shift). - Post-concussion SBS compression strain (sphenoid+occiput compressed toward each other): treat with SBS decompression — vault hold applies gentle distraction: sphenoid contacts (greater wings) lift anterosuperiorly, occipital contacts guide posteroinferiorly, separating the bones. - 4-day post-MVA, CT negative for fracture/bleed, wants OMT for headache → generally safe to proceed but WITH CAUTION and a recheck (not an outright "no," not unconditional "yes go ahead" without caveat). - Down syndrome + constipation, considering OA/suboccipital decompression: use CV4 instead PLUS abdominal techniques (OA/suboccipital decompression involves cervical motion/rotation which is relatively contraindicated in Down syndrome due to atlantoaxial instability risk — avoid direct OA rotation techniques in this population). - "Worst headache of my life" yesterday, now resolved, wants CV4 for sleep → Refer for urgent workup (non-contrast CT, then LP if negative) — NO cranial OMT today (concern for possible SAH until ruled out). 131 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - Asthma exacerbation on SABA, autonomic-balancing OMT goal: CV4 plus suboccipital release (or the combo boosting/modulating vagal tone — suboccipital release specifically modulates vagal tone/parasympathetic bronchoconstrictor side). - Trigeminal neuralgia V2 distribution: most relevant bone/foramen = Sphenoid bone, foramen rotundum (sphenoid torsion/sidebending can narrow foramen rotundum and irritate V2) — NOT foramen ovale (V3/temporal bone), NOT infraorbital foramen alone, NOT foramen magnum. - Functional constipation (purely vagal, slow gut, no alarm features), single cranial-area technique most directly addressing vagus near skull-base exit = OA/suboccipital decompression (jugular foramen). - Infant torticollis (head tilt left, rotated right) + right temporal bone external rotation + left occiput compressed posteriorly → consider Spinal accessory nerve (CN XI) at jugular foramen on the LEFT (CN XI irritation causes ipsilateral SCM spasm pulling head into torticollis — tilts toward affected side, rotates away). - Chronic post-viral cough + dry eyes + boggy turbinates + dry conjunctiva: technique releasing the ganglion responsible for BOTH lacrimal and nasal secretion in one move = Sphenopalatine ganglion release. - Newborn post-vacuum-extraction delivery, cephalohematoma, right temporal bone in internal rotation with restricted external rotation → associated finding: difficulty with suckling on the right side due to hypoglossal or glossopharyngeal nerve irritation (temporal bone houses jugular foramen exit for CN IX, X, XI — restriction can affect feeding-related cranial nerve function). - Ethmoid sinus drainage technique: approached INDIRECTLY by contacting the frontal and sphenoid bones (ethmoid articulates with both; there is no place on external skull to directly palpate/contact the ethmoid). 132 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Cranial Strain Patterns (SBS) OMM · CRANIAL Cranial Strain Patterns — Sphenobasilar Synchondrosis (SBS): reading the mechanism of injury THE SBS: cartilaginous joint where the body of the sphenoid meets the basilar occiput at the cranial base. True growth plate in a child; fused in an adult but the osteopathic cranial model holds it retains a tiny rhythmic give. Palpation tool = the VAULT HOLD: index fingers on greater wings of sphenoid, little fingers on squamous occiput, ring fingers on mastoids, middle fingers ahead of ears — fingers feel the mirror image of whatever the SBS is doing. Normal cranial rhythmic impulse (CRI) ≈ 10-14 cycles/min; a strain often shows up FIRST as a rhythm change before you can name the position. Core concept: "A strain pattern is the hinge getting held in a position it should pass through, usually after a force pushes it there. Name the position, and you have named the strain." THE THREE AXES (every strain described by which axis the bones move around) - Transverse axis (left-right, one per bone): rocks bones forward/back — axis of normal flexion/extension AND of the traumatic vertical strain. - Anteroposterior (A-P) axis (front-back, midline, one shared axis): rotation tips one side up, other down — axis of torsion and the rotation component of sidebending rotation. - Vertical axes (up-down, two — one per bone): swings bones side to side — axis of lateral strain and the sidebending component of sidebending rotation. PHYSIOLOGIC STRAINS (normal motions; pathologic only when the SBS gets STUCK in one) - Flexion/Extension: sphenoid and occiput rotate OPPOSITE directions around their two TRANSVERSE axes. Flexion: skull shortens front-back, widens side-to-side (SBS rides superior). Extension: lengthens, narrows (SBS rides inferior). Baseline cranial-rhythm rocking. - Torsion: sphenoid and occiput rotate OPPOSITE directions around ONE A-P axis. One greater wing rides high, other low (like wringing a towel). NAMED FOR the side of the SUPERIOR (high) greater wing — right wing up = right torsion. - Sidebending rotation: TWO motions at once — bones sidebend around their two VERTICAL axes AND rotate the SAME way around one A-P axis. Result = convexity/fullness on one side (that side rotates down toward the table). NAMED FOR the side of the convexity/fullness (where vault-hold fingers spread apart) — right fullness = right sidebending rotation. NONPHYSIOLOGIC (TRAUMATIC-ONLY) STRAINS — body never does these voluntarily; each requires an external force: 133 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Vertical strain (superior or inferior): sphenoid and occiput rotate around their TRANSVERSE axes in the SAME direction (board fork vs. flexion/extension: same axes, but same direction instead of opposite — "same plane, wrong partner"). Sphenoid base held superior or inferior relative to occiput. Classic cause: birth molding/forceps (produces vertical strain first, though lateral strain also common). - Lateral strain ("parallelogram head"): sphenoid and occiput SHIFT the same way around their two VERTICAL axes, sheared at the synchondrosis — head looks like a parallelogram from above. NAMED FOR the side the sphenoid base shifts toward. Classic causes: blow to the side of the head, birth molding. - SBS compression: anterior-to-posterior force jams sphenoid straight into occiput at the synchondrosis. NO rotation, NO clean axis — pure approximation. Classic mechanisms: forehead/windshield blow, fall onto the vertex (top of head) — both drive force into the SBS along different paths but produce the SAME strain. Presentation (the giveaway triad): LOW-AMPLITUDE cranial rhythm (bones jammed, barely move), CHRONIC/progressive headache, often depressed/flat mood. TREATING SBS COMPRESSION: goal = gentle decompression, NEVER force. Techniques: CV4 (compression of the fourth ventricle) or balanced membranous/ligamentous tension — coax the synchondrosis to spring, don't lever it. Why gentle: reciprocal tension membrane and venous sinuses run through this region; the model rewards patience — hold position, follow tissue, wait for release. RED FLAG WORKUP FIRST: constant, progressive headache after head trauma requires imaging/neuro exam BEFORE cranial treatment — OMT is an adjunct only after bleed/fracture excluded. DECISION TOOL — MECHANISM → STRAIN - Fall straight onto the vertex (top of head) → SBS compression (axial force straight down into the joint). - Forehead striking a windshield → SBS compression (A-P force drives sphenoid straight back into occiput — SAME destination as vertex fall via a different doorway; "any force that approximates the SBS is compression"). - Blow to the side of the head from a falling object → Lateral strain (shears sphenoid/occiput sideways, same direction around two vertical axes → parallelogram head). - Molding of an infant skull during difficult delivery → Vertical strain (classic; lateral strain also common) — molding forces make nonphysiologic strains, vertical strain first among them. LOCALIZING TO THE SBS vs. COMPETING STRUCTURES (key discriminator logic, repeatedly tested): a forehead-to-windshield blow could plausibly injure the coronal suture, the OA joint, OR the SBS. - Coronal suture (frontoparietal) override → gives LOCAL, FOCAL tenderness at the suture line only — not a global low-amplitude rhythm with flat mood. 134 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - OA (occipitoatlantal) flexion dysfunction → a NECK joint finding — gives suboccipital headache WITH cervical exam findings; wrong "floor of the building" if cervical exam is normal. - SBS compression → the A-P vector traveled all the way to the cranial base; low-amplitude WHOLE-HEAD rhythm + chronic headache + mood change is the discriminating package. Rule: focal suture pain stays local; OA dysfunction lives in the neck (needs cervical findings); only a force carried all the way to the base gives the global low-amplitude compression picture. FULL REFERENCE TABLE (Strain | Type | Axes | Named for/clue) - Flexion/Extension | Physiologic | Two transverse, opposite directions | SBS superior (flexion) or inferior (extension) - Torsion | Physiologic | One A-P, opposite directions | The superior (high) greater wing - Sidebending rotation | Physiologic | Two vertical + one A-P, same direction | The convex (full) side - Vertical strain | Traumatic | Two transverse, same direction | Sphenoid base superior or inferior - Lateral strain | Traumatic | Two vertical, same direction (shear) | Side the sphenoid base shifts to; parallelogram head - SBS compression | Traumatic | No axis; A-P approximation | Low-amplitude rhythm, chronic headache, depression QUIZ / VIGNETTE HIGHLIGHTS (7 original board vignettes) 1. 36F, whiplash MVC 4wk ago, headache base-of-skull spreading to crown, normal neuro/CT/cervical films, suboccipital tenderness reproducing headache, OA translation restricted & held in FLEXION, CRI normal rate/amplitude → Occipitoatlantal (OA) flexion dysfunction (NOT SBS compression — CRI is normal, not low-amplitude; whiplash concentrated load at the OA joint in the neck, not the cranial base). 2. 58F, MVC, head fullness + unsteadiness, vault hold shows right-hand fingers spreading apart (convexity/fullness on right) + right hand drawn slightly caudad → Sidebending rotation: axes = two vertical + one A-P (the convexity signals vertical-axis sidebending; the accompanying rotation rides the A-P axis — same-direction combo, distinct from pure torsion which has no fullness). 3. 41M, forehead struck steering wheel, vault hold shows both index fingers moving the SAME direction around transverse axes (not mirroring) → this nonphysiologic vertical strain is separated from physiologic flexion/extension specifically because the sphenoid/occiput rotate the SAME direction around transverse axes (flexion/extension = opposite directions on the same axes — the fork is direction, not axis). 135 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY 4. 33F, fall from horse, side-of-head impact, bite feels off, vault hold shows hands rotating OPPOSITE directions around A-P axis, RIGHT greater wing riding cephalad (superior), NO side-to-side fullness → Right torsion (named for the high/superior wing; absence of fullness rules out sidebending rotation). 5. 24M, side-of-head blow from falling object, bandlike headache, head subtly parallelogram-shaped, sphenoid/occiput translate TOGETHER in the same direction (not rotating oppositely) → Lateral strain (side blow + parallelogram head + same-direction vertical-axis shear). 6. 47M (the case patient), forehead-windshield blow, constant worsening headache, flat/withdrawn mood, poor sleep, normal CT/cervical films, MARKEDLY low-amplitude CRI with little springing motion → SBS compression: an A-P force approximated sphenoid and occiput at the synchondrosis (not lateral strain [wrong force vector], not torsion [rhythm would show axis rotation, not flattening], not vertical strain [that still rotates on an axis; compression has none], not OA dysfunction [neck exam/films normal]). 7. Same 47M case, testing WHY the diagnosis localizes to the SBS rather than the coronal suture or OA joint → an A-P force carried all the way to the cranial base approximated the SBS, producing a GLOBAL low-amplitude rhythm — a focal suture restriction would stay local; an OA flexion dysfunction is a neck pattern; TMJ derangement and cervical facet injury are distractors with no supporting exam findings. MEMORY HOOKS - "Name the position, and you have named the strain" — every strain = the hinge stuck somewhere it should only pass through. - Physiologic pairs move OPPOSITE (flexion/extension, torsion, sidebending-rotation's A-P component); nonphysiologic vertical & lateral strains move the SAME direction on their respective axis pairs — "same plane, wrong partner" is the board fork between flexion/extension and vertical strain specifically. - Torsion = named for the HIGH (superior) greater wing. Lateral strain = named for the side the sphenoid BASE SHIFTS TOWARD. Sidebending rotation = named for the CONVEX (full) side. - SBS compression triad: low-amplitude CRI + chronic/progressive headache + flat/depressed mood — classic mechanisms are a forehead/windshield blow OR a vertex fall (different doorway, same destination). - Always rule out bleed/fracture (imaging + neuro exam) before cranial treatment when headache is constant/progressive post-trauma — OMT is adjunct, not first-line workup. - Localizing discriminator: focal = suture; neck findings = OA joint; global low-amplitude whole-head rhythm = SBS (compression made it all the way to the base). 136 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Cranial Dysfunctions (PRM, Five Strains, Deep Anatomy) CRANIAL DYSFUNCTIONS — PRM MECHANICS, VAULT-HOLD HAND MODEL, SURFACE ANATOMY, AND 29 VIGNETTES (Supplement to 21b_cranial-strain-patterns.txt — read that file first. This file skips what 21b already has verbatim — the 3-axis framework, the 5-strain comparison table, the basic decision tool, and the "named for sphenoid / named for high wing / named for convexity" naming rules — and adds only what THIS source covers in more depth or not at all: full PRM flexion/extension coupling, paired-vs-midline bone detail, the exact digit-by-digit vault hold, the vault-hold HAND-MOTION model with its naming traps, SFOE/SEFO notation, direct-vs-indirect technique, still point, RTM (falx/tentorium), sacral-iliac coupling, cranial surface landmarks (pterion/asterion/bregma/lambda), craniosynostosis shapes, neonatal occiput anatomy, and the temporal-bone/CN VII and temporal-bone/eustachian-tube clinical links.) 01. THE PRIMARY RESPIRATORY MECHANISM (PRM) — FULL FLEXION/EXTENSION COUPLING MODEL Rubber-ball analogy given by the source: push up on a rubber ball from below and it squishes wider and shorter — that is cranial flexion. Let go and it springs back tall and narrow — that is cranial extension. FLEXION PHASE (all five couple together) - SBS rises (moves superiorly). - Paired bones (temporal, parietal) EXTERNALLY rotate — the vault flares outward/widens. - AP diameter SHORTENS as the vault widens transversely ("wider + shorter = flexion"). - Sacrum COUNTERNUTATES (= sacral flexion): sacral base tips POSTERIOR. Coupled to the SBS through the dural tube. EXTENSION PHASE (mirror image of all five) 137 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - SBS falls (moves inferiorly). - Paired bones INTERNALLY rotate — the vault narrows, everything pulls back in and tightens. - AP diameter LENGTHENS as the vault narrows transversely ("narrower + longer = extension"). - Sacrum NUTATES (= sacral extension): sacral base tips ANTERIOR. Mnemonics (verbatim): - "Flexion Flares." In flexion, everything flares outward: paired bones externally rotate, skull widens, sacrum base goes posterior. Extension is the opposite: everything narrows back in. - "S in Spine": in the extension phase, the spine straightens as the sacrum nutates. - Board shortcut given directly by the source: "Flexion = SBS up, skull wide, paired bones OUT, sacrum counternutation. Extension = everything reverses." CRI (cranial rhythmic impulse) rate — DISCREPANCY FLAG: this source's tested/correct answer is 6-12 cycles/min, NOT the 10-14/min cited in 21b. Distractor traps this source builds around the CRI-rate question (know these regardless of which "normal range" your exam source uses): - 1-3/min = the "long tide," a deeper/slower rhythm some advanced practitioners describe as distinct from the standard CRI — NOT the boards' CRI answer. - 60-100/min = normal heart rate; a common student error is mistaking your own pulse (felt through your fingertips) for the CRI. 15-20/min = normal pulmonary respiratory rate; do not let the name "primary RESPIRATORY mechanism" bait you into picking a breathing-rate answer — the PRM was named for being theorized as a primary life rhythm, not because it matches lung breathing. - 25-30/min = too fast for any recognized cranial rhythm; anything above ~15/min in a "cranial rhythm" answer should raise a flag. 02. PAIRED VS UNPAIRED (MIDLINE) BONES — full six-bone table (21b only states the general rule; this adds every bone's specific flexion behavior and its own "board note"): Bone Classification In flexion Board note Sphenoid Unpaired/midline Flexes; greater wings move laterally + inferiorly; SBS rises Midline bones flex/extend, never rotate ext/int. Sphenoid is the KEY bone for naming torsion, vertical strain, lateral strain. 138 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Bone Classification In flexion Board note Occiput Unpaired/midline Flexes with sphenoid at the SBS; squamous portion moves posteriorly Occiput + sphenoid together define the SBS; their relative motion determines the dysfunction type. Temporal (paired) Paired Externally rotates; mastoid tips move medially, petrous portions widen skull laterally Paired bones externally rotate in flexion, internally rotate in extension — ALWAYS. Opposite pattern from midline bones. Parietal (paired) Paired Externally rotates; parietals flare laterally, widening the vault Along with temporals, demonstrates "Flexion Flares." Ethmoid Unpaired/midline Flexes with the other midline bones; descends slightly with sphenoid flexion Rarely tested directly; know it's midline (flex/extend), not a rotator. Vomer Unpaired/midline Flexes; moves with sphenoid as SBS rises Rarely a standalone question; its value is just knowing it belongs in the midline group. Rule: never cross these categories on a board question — midline bones flex/extend, paired bones externally/internally rotate, and the two patterns never swap. 03. THE VAULT HOLD — exact digit-by-digit placement (21b gives a simplified version; this is the source's precise anatomy): - Index (2nd digit): greater wing of the SPHENOID. Middle (3rd digit): squamous portion of the TEMPORAL bone, approximating the zygomatic process. - Ring (4th digit): petrous portion of the TEMPORAL bone, near the mastoid process. - Little (5th digit): squamous portion of the OCCIPUT, kept medial to the occipitomastoid suture. - Thumbs: crossed over the sagittal suture, resting lightly on the frontal bone — off the head, acting as a fulcrum, not a contact point. What you feel: flexion = greater wings lift and spread (index fingers rise/spread), vault widens under your hand. Extension = wings descend and narrow. Torsion = one greater wing reads higher than the other under the index fingers. SB-R = one side of the vault bulges into your hand. 139 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY 04. VAULT-HOLD HAND-MOTION MODEL — THE NAMING TRAPS (this is the granular content the source builds an entire "Model Lab" around; it goes well beyond 21b's naming rules by specifying which CONTACT actually signals the name for each strain, and repeatedly warns that the intuitive contact is the wrong one) Index contacts ride the sphenoid greater wings. Little-finger contacts ride the occiput. The source's own framing: "The board trick is deciding which contact actually names the pattern." LATERAL STRAIN — the sliding-door pattern. Index and little fingers drift in OPPOSITE horizontal directions (parallelogram feel). Per this source's stated hand-position shortcut: the LITTLE FINGERS point toward the named side; the INDEX FINGERS move opposite and are explicitly called "the decoy." Example given: index fingers drift right + little fingers drift left → named LEFT lateral strain. Quote: "Index right plus little left equals LEFT lateral strain. The little fingers point to the named side; the index fingers are the decoy." BOARD TRAP flagged explicitly: a student who reflexively names the strain by the index-finger drift (reasoning "index = sphenoid = the bone lateral strain is named for") gets the MIRROR-IMAGE wrong answer. Memorize the hand-shortcut as tested even though it appears to run against the plain-language naming rule ("named for the direction the sphenoid/basisphenoid translates") — in this source's vault-hold model, the little-finger contact/overall drift is what tracks the named direction, not the index-finger (wing-tip) contact. A second, different lateral-strain trap (stem-language, not hand-motion): a vignette described "sphenoid displaced RIGHT, occiput displaced LEFT" and the correct name was RIGHT lateral strain — the trap there is reflexively naming it by whichever bone's direction is mentioned LAST or most vividly (here, "occiput...left" baits a wrong "left" answer) instead of deliberately reading the SPHENOID's stated direction. Mnemonic (verbatim): "Lateral strain makes a paralleLogram, and the sphenoid Leads the name." TORSION — the seesaw pattern, and NO index/little inversion trap here. Index and little fingers on the SAME side move the SAME vertical direction together (one whole side rises, the other whole side falls). Example given: left torsion → the LEFT index and LEFT little fingers move superiorly together, while the RIGHT index and RIGHT little fingers move inferiorly together. BOARD TRAP for torsion is different from lateral strain's: it's about which WING gets emphasized in the stem. Torsion is named for the HIGH (superior) wing — a stem that prominently states "the RIGHT wing is INFERIOR" is baiting a "right torsion" answer; the correct read is that the LEFT wing (the one not emphasized) is the high one, making it left torsion. Mnemonic (verbatim): "Torsion Twists, named for the Top." 140 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY VERTICAL STRAIN — the elevator pattern (contrast explicitly given by the source: "Vertical strain is the elevator. Lateral strain is the sliding door."). The whole INDEX-finger row moves one vertical direction while the whole LITTLE-finger row moves the opposite vertical direction (bilateral, not a side-to-side asymmetry the way torsion is). Example given: inferior vertical strain → index fingers move SUPERIORLY, little fingers move INFERIORLY. (Note this is the same "the finger contact you'd assume tracks the sphenoid's named direction actually reads the opposite of the named direction" pattern seen in lateral strain — treat it as the same class of trap: don't name vertical strain off the index-finger direction alone: work out the SFOE/SEFO letters and go by which bone is described as flexed vs extended, and which direction the sphenoid BASE (not the wing tip under your index finger) is said to be riding.) SIDEBENDING-ROTATION (SB-R) — no discrete finger-drift pattern is spelled out; the tested feel is simply "one side of the vault bulges into your hand" (a convexity, not a drift). Named for the convexity/round side, same as 21b. Mnemonic (verbatim): "SB-R: Same sideBend, named for the Round side." COMPRESSION — no directional drift at all. Hallmark on the hold: CRI diminished/absent, cranium feels rigid, no inherent motion at the SBS to read a direction from. Mnemonic (verbatim): "Compression = Crushed shut." 05. SFOE / SEFO — VERTICAL STRAIN NOTATION (not present in 21b at all) Vertical strain is nonphysiologic and moves on TWO PARALLEL TRANSVERSE axes, sphenoid and occiput rocking the SAME rotary direction (not the opposite/mirror pattern of normal flexion/extension). Because flexion/extension are themselves named in mirror image for the two bones, this same-direction motion reads as "one bone flexed, the other extended" — which is why the notation is always SFOE or SEFO, never "both flexed." - Superior vertical strain = SFOE = Sphenoid Flexed, Occiput Extended. Sphenoid base rides SUPERIOR. Classic cause given: an anterior CENTRAL blow to the frontal bone driving the sphenoid base up. - Inferior vertical strain = SEFO = Sphenoid Extended, Occiput Flexed. Sphenoid base rides INFERIOR. Trauma can come from anterior OR posterior to the SBS (less mechanism-specific than superior VS). - Naming is always for the SPHENOID, and the notation spells out both bones' status in two letters each, sphenoid letter always first. - Mnemonic (verbatim): "Sphenoid up is Superior, written SFOE." Flip both letters for the mirror: SEFO = inferior. 141 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Windshield-mechanism reconciliation with 21b (important nuance, not a contradiction if you read the findings): 21b's classic windshield-blow teaching case is SBS COMPRESSION (low-amplitude global rhythm, chronic headache, flat mood — a pure A-P approximation with no axis). This source has a DIFFERENT windshield vignette (63M, high-speed MVC) whose finding is a specific DIRECTIONAL sphenoid-base-superior displacement with a diminished-but-present CRI → that is SUPERIOR VERTICAL STRAIN, not compression. Same mechanism (A-P force to the forehead), two different correct diagnoses — the discriminator is always the EXAM FINDING given (directional displacement + residual motion = strain; joint jammed/approximated with no axis + globally flattened rhythm = compression), never the mechanism label alone. Similarly, this source's own "master rule" says "if the stem says birth trauma/difficult delivery, think compression first" — which sits in tension with 21b's decision tool ("molding of an infant skull → vertical strain classic, lateral strain also common"). Resolve the same way: birth trauma can produce ANY of the three traumatic dysfunctions; forceps/prolonged-labor cases that show TOTAL lockout (no flexion/extension at all) + NO asymmetry are compression, while molding cases that show a directional, asymmetric shear with some residual motion are vertical or lateral strain. Read the findings, not just the word "birth." 06. PHASE-PREFERENCE DYSFUNCTIONS: FLEXION DYSFUNCTION / EXTENSION DYSFUNCTION (a concept 21b does not separately name — this is effectively the "physiologic flexion/extension strain" entry in 21b's table fleshed out into its own diagnosis) - Flexion dysfunction: the SBS prefers/gets stuck favoring the flexion phase and has difficulty returning to extension — but motion is NOT absent, it's biased. Vault stays widened transversely, AP diameter stays shortened (the flexion shape), even though the SBS can still move. - Extension dysfunction: the mirror image — SBS prefers extension, resists returning to flexion, vault stays narrow, AP stays long. - Discriminator vs the 5 named strains: no wing asymmetry (rules out torsion), no convexity (rules out SB-R), no trauma or directional sphenoid-base displacement (rules out vertical strain), and — critically — motion is still PRESENT, just phase-biased (rules out compression, which is a TOTAL lockout with CRI absent). A symmetric global shape held preferentially in one phase, with residual motion, is the tell for a phase-preference dysfunction rather than any of the 5 structural strains. 07. TREATMENT: DIRECT VS INDIRECT TECHNIQUE FOR TORSION (new — 21b covers no technique beyond CV-4/ balanced ligamentous tension for compression) - Direct technique: engage the restrictive barrier by moving AWAY from (opposite) the dysfunction. 142 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Example: right torsion (right wing high) → direct correction = rotate the sphenoid TOWARD LEFT torsion (bring the right wing down, left wing up) — i.e., correct toward the mirror/opposite named position. - Indirect (functional) technique: move INTO / exaggerate the existing dysfunction, hold at the exaggerated position, and let inherent forces produce a release. Example: left torsion (left wing high) → indirect correction = rotate FURTHER INTO left torsion (accentuate the left-wing elevation further), hold, wait for release. - Quick rule: direct = away from the lesion (name the opposite position and move toward it). Indirect = into the lesion (name the same position and exaggerate it). 08. STILL POINT (new concept; 21b only mentions CV-4 as a compression treatment, not as a still-point inducer) - A still point is a THERAPEUTIC PAUSE in the CRI occurring during treatment: the rhythm slows, pauses for several seconds, then resumes with IMPROVED amplitude/quality — a reset of the PRM. - CV-4 (compression of the fourth ventricle) is the classic technique used to intentionally induce a still point. - Distinguish a still point from: compression (a PRE-EXISTING pathologic dysfunction with permanently diminished/absent CRI — not a transient in-treatment event, and it does not spontaneously resolve into better motion the way a still point does); syncope (loss of consciousness from cerebral hypoperfusion — unrelated, patient stays fully conscious during a still point); lateral strain (a static structural dysfunction, not a dynamic rhythm event); CN entrapment (produces focal neuro symptoms, not a CRI phenomenon). 09. COMPRESSION TREATMENT — added specificity beyond 21b's "CV4 or balanced ligamentous tension, never force" - Explicit stated goal: gentle LATERAL DECOMPRESSION — separate the sphenoid and occiput at the SBS to restore space so flexion/extension and CRI can resume. - HVLA is an ABSOLUTE CONTRAINDICATION in the neonatal cranium specifically: the sutures are unossified membranous cartilage that deforms/molds easily, and a high-velocity thrust risks catastrophic structural damage. Neonatal/infant cranial treatment is always gentle, subtle, and follows inherent tissue forces — never a direct high-velocity technique. - Wrong-technique distractors worth knowing: AP-axis rotation (that corrects torsion, not compression); exaggerating the compression (moves in the wrong direction even under general indirect-technique logic — the treatment GOAL for compression is always decompression, never further approximation); inducing sidebending (that corrects SB-R, not compression). 10. RECIPROCAL TENSION MEMBRANE (RTM) — FALX CEREBRI AND TENTORIUM CEREBELLI (entirely new; not in 21b) - The RTM is the intracranial membrane system (falx cerebri, tentorium cerebelli) that MOVES WITH and guides/limits cranial bone motion — it always responds to cranial motion, 143 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY it is never static, because its attachment points are bones that are themselves moving. - Falx cerebri: attaches to the crista galli (ethmoid) ANTERIORLY and the internal occipital protuberance POSTERIORLY, purely in the midsagittal plane. - Flexion: SBS rises, AP diameter SHORTENS → the two attachment points move closer together → falx SHORTENS. - Extension: SBS falls, AP diameter LENGTHENS → attachment points move apart → falx LENGTHENS. - The falx NEVER shifts laterally during normal PRM (a lateral shift would indicate pathology) — its only normal motion is AP length change. - Tentorium cerebelli: attaches to the petrous ridges of the TEMPORAL bones laterally. A temporal bone dysfunction therefore most DIRECTLY affects tentorium cerebelli tension — more directly than any effect on the frontal bone, nasal bone, sagittal suture, or falx cerebri, none of which the temporal bone attaches to. The tentorial notch contains CN III, the brainstem, and the posterior cerebral arteries, so tentorial tension from a temporal-bone dysfunction can produce headaches and cranial nerve symptoms. 11. SACRAL-ILIAC COUPLING — extending the PRM to the SI joint (new; 21b/PRM section above stops at the sacrum itself) - The sacrum and ilia ALWAYS move in OPPOSITE directions at the SI joint to maintain joint congruence — like two meshing gears, or bevel gears where one rotating forward forces the other backward at their contact point. - Stated pairing: cranial extension → sacrum NUTATES (base moves anterior) → ilia simultaneously POSTERIORLY rotate. - By the same "always opposite" logic (not explicitly spelled out for this phase in the source, but a direct mirror of the stated rule): cranial flexion → sacrum COUNTERNUTATES → ilia would be expected to rotate ANTERIORLY. Treat this specific flexion-phase pairing as an inference from the stated rule rather than a directly quizzed fact. - Category-error trap flagged by the source: don't use cranial paired-bone language ("internal/external rotation") for the SI joint — the ilia POSTERIORLY/ANTERIORLY rotate in the sagittal plane; that's a different vocabulary from temporal/parietal external/internal rotation. 12. CRANIAL SURFACE ANATOMY / LANDMARKS (entirely new — not covered in 21b at all) 144 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Landmark Bones/sutures that meet Location Was a fontanelle? Board trap Pterion Greater wing of sphenoid + temporal + parietal + frontal (an "H" shape) Temple, just behind/above the zygomatic arch No Overlies the middle meningeal artery (MMA); a fracture here tears the MMA → EPIDURAL hematoma with the classic "lucid interval" ("talk and die"). Lateral head trauma + lucid interval = pterion/ MMA/epidural, NOT a bridging vein (that's a subdural, different site/mechanism). Pterion is the thinnest part of the lateral skull. Asterion Occipital + temporal + parietal (occipitomastoid, parietomastoid, lambdoidal sutures converge) Just behind the ear No Surgical landmark for the posterolateral skull / transverse-sigmoid sinus junction. Don't confuse with pterion: pterion = anterior/temple/4 b ones/H-shape/MMA ; asterion = posteri or/behind-ear/3 bones/3 sutures. Bregma Sagittal + coronal + metopic sutures Top of the vault, midline Yes — the ANTERIOR fontanelle (the largest one); closes ~18-24 months. Bulging = increased ICP in an infant (meningitis, hydrocephalus, hemorrhage) Needs all THREE sutures (sagittal + coronal + metopic) — leaving out the metopic is the classic half-right miss. 145 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Landmark Bones/sutures that meet Location Was a fontanelle? Board trap Lambda Sagittal + lambdoid sutures Back of the vault, midline (named for resembling the Greek letter lambda) Yes — the POSTERIOR fontanelle; closes much earlier, ~2-3 months Sagittal + lambdoid = POSTERIOR fontanelle at lambda; sagittal + coronal + metopic = ANTERIOR fontanelle at bregma. Mixing the two is the single most common suture error. High-yield emergency takeaway (verbatim sense): "the one that kills" — the pterion overlies the MMA, and a temple blow that fractures it can produce an epidural hematoma with a lucid interval; of the four landmarks, this is the highest-yield emergency association. Mnemonic — squamous vs petrous (verbatim): "Squamous = squama = 'scale,' the same root as squamous epithelium (flat cells). So the squamous temporal is the flat, scale-thin lateral plate, the thinnest part of the skull, which is exactly why a blow at the pterion tears the middle meningeal artery. Petrous = petra = 'rock,' the hardest bone in the body: the dense pyramid that hides and protects the inner ear, with the tentorium cerebelli anchored along its ridge. Flat scale on the outside, rock on the inside." Mnemonic — front vs back, fast (verbatim): "Pterion = front (temple), four bones (sphenoid, temporal, parietal, frontal), H shape, middle meningeal artery. Asterion = back (behind the ear), three bones (occipital, temporal, parietal), three sutures. Bregma = top-front midline, old anterior fontanelle. Lambda = top-back midline, old posterior fontanelle." FONTANELLE ASSESSMENT (new — quick reference) - Bulging at rest in a symptomatic infant = increased ICP (meningitis, hydrocephalus, intracranial hemorrhage) — an emergency, especially with lethargy + high-pitched cry. - Sunken = dehydration (low fluid volume → low ICP → membrane falls inward). Bulging and sunken are opposite findings from opposite pathophysiology. - Normal fontanelle is soft, flat, slightly pulsatile; may bulge TRANSIENTLY with crying/straining, but sustained bulging at rest is always abnormal. - Craniosynostosis and plagiocephaly are SHAPE findings (suture fusion or positional molding), not fontanelle-pressure findings — don't confuse an abnormal head shape with a pressure emergency. CRANIOSYNOSTOSIS SHAPES (new table; general rule: growth is blocked PERPENDICULAR to the fused suture, so compensatory growth is forced along the other axis): 146 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY Suture fused Resulting shape Note Sagittal (most common) Scaphocephaly (long, narrow, boat-shaped) No side-to-side growth possible; compensatory growth goes AP. Bilateral coronal Brachycephaly (short, wide) No AP growth possible; compensates laterally — the opposite problem/shape from sagittal synostosis. Metopic Trigonocephaly (triangular forehead) Different suture from sagittal even though both are midline — don't conflate them. Multiple sutures (often syndromic) Turricephaly (tower skull) Growth forced upward when several sutures fuse at once; an isolated single-suture synostosis will not produce this. Unilateral coronal or lambdoid, or (more commonly) positional molding Plagiocephaly (asymmetric) Asymmetric/unilateral process — contrast with the symmetric, midline sagittal/metopic/bicoronal patterns above. 13. NEONATAL OCCIPUT ANATOMY AND BIRTH-MOLDING PLAGIOCEPHALY (new) - The neonatal occiput has FOUR separate parts joined by cartilage: the squamous part (posterior), two condylar parts (lateral), and the basilar part (anterior). - Difficult/molded birth can flatten one condylar part → the occiput rotates → the adjacent (ipsilateral) temporal bone, and therefore the ear, gets pushed ANTERIORLY on that side. - Board trap: the anteriorly displaced ear looks like it implicates the TEMPORAL bone (since the temporal borders the ear), but the ear shift is a SECONDARY consequence — the primary lesion is the flattened condylar part of the OCCIPUT. 14. TEMPORAL BONE CLINICAL LINKS (new — two distinct high-yield mechanisms) CN VII (facial nerve) via the temporal bone: - Path: internal acoustic meatus → facial canal within the PETROUS temporal → exits the stylomastoid foramen, which sits directly anterior to the occipitomastoid suture. - A temporal bone held in dysfunction (e.g., internal rotation after a lateral head blow) crowds this canal/suture and irritates CN VII. - Motor-nerve-irritation pattern (important discriminator): irritation of a motor nerve begins as HYPERactivity, not weakness — eyelid myokymia (orbicularis oculi twitching) first, then a march downward to more of the face as more of the nerve is provoked. Contrast with a true CN VII palsy presentation, which is weakness/paralysis. 147 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - Ipsilateral rule: temporal bone in INTERNAL rotation on the symptomatic side goes with RESTRICTION of the occipitomastoid suture on the SAME side (not the contralateral side — that's a side-swap trap). Temporal bone in EXTERNAL rotation would OPEN that suture, not narrow it (picking "external rotation" when the stem states internal rotation is reading the stem backward). - Discriminate CN VII/temporal-bone irritation from: occipital/condylar dysfunction (crowds the jugular foramen + hypoglossal canal → CN IX, X, XI, XII → dysphagia, hoarseness, shoulder weakness, tongue findings — NOT facial twitch); SBS compression (a symmetric, GLOBAL midline lockout, not a one-sided nerve story); vertical strain or torsion (SBS-level sagittal/AP-axis findings with no mechanism to selectively crowd a facial canal). Eustachian tube via the temporal bone: - The eustachian tube runs through the PETROUS portion of the temporal bone. - Restricted temporal bone motion can tighten this bony channel, impairing the tube's ability to open and equalize middle-ear pressure → fluid accumulates → bacteria grow → recurrent OTITIS MEDIA (especially relevant in children). - Distinguish from: CSF production (a choroid-plexus function, irrelevant to temporal dysfunction); cochlear compression (an INNER-ear problem → hearing loss, tinnitus, vertigo — not an infection); mandibular/TMJ restriction (jaw/facial symptoms, not middle-ear infection); nasal drainage (an ethmoid/ maxillary-sinus problem, not a temporal-bone one). 15. ALL 29 CLINICAL VIGNETTES FROM THIS PAGE (the "Opening Challenge" stem is a duplicate of Vignette 3 below — name-checked, not repeated in full). Condensed to stem finding → answer → key reasoning; overlaps with 21b's 7 vignettes are flagged inline. 1. 22M, no trauma, left wing superior/right wing inferior, AP-axis opposite rotation, CRI palpable → LEFT TORSION (named for the HIGH wing = left; trap = anchoring on the more prominently-worded "right wing inferior" and answering right torsion). [Same core teaching as 21b's vignette 4 (33F fall from horse), different stem numbers.] 2. 35F, no trauma, SBS convex right, both bones sidebent right + rotated right, CRI intact → RIGHT SB-R (named for the convexity; "compression" is a distractor here specifically ruled out because CRI is intact, not absent). [Same concept as 21b's vignette 2 (58F MVC); this version adds compression as an explicit distractor.] 3. 28F, soccer ball to left side of head, 4mo frontal headache, vault-hold parallelogram (index fingers drift right, little fingers drift left), CT negative → LEFT LATERAL STRAIN, named by the LITTLE-finger direction per this source's hand model; the index-finger drift is explicitly called "the decoy." [Also duplicated verbatim as this page's own Opening Challenge; conceptually overlaps 21b's vignette 5 (side blow → lateral strain), but this version supplies the specific index/little decoder trap that 21b does not spell out.] 148 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY 4. Premature infant, bulging anterior fontanelle + lethargy + high-pitched cry → INCREASED ICP (bulging = pressure up: meningitis/hydrocephalus/hemorrhage; sunken = dehydration; transient bulge with crying is normal, sustained bulge at rest is not). [Not in 21b.] 5. 65M, vault hold performed (thumbs on greater wings, fingers over parietal/temporal) → assessing CRI AND SBS MOTION (a technique-identification question, not a diagnosis). [Not in 21b.] 6. 47F, falx cerebri attachments (crista galli anterior, internal occipital protuberance posterior) → during FLEXION the falx SHORTENS AP (attachment points approximate as AP diameter shortens); it never shifts laterally, being midline. [Not in 21b — RTM content.] 7. 8yo boy, premature sagittal-suture fusion → SCAPHOCEPHALY (long, narrow, boat-shaped; growth blocked perpendicular to the fused suture, forced AP instead). [Not in 21b.] 8. 55M, persistent otitis media + restricted right temporal bone → mechanism = IMPAIRED EUSTACHIAN TUBE FUNCTION (tube runs through petrous temporal; restriction tightens the channel, impairs pressure equalization, causes fluid stasis/infection). [Not in 21b.] 9. 43M/med student palpating rhythmic vault widening/narrowing → normal CRI rate = 6-12 CYCLES/MIN (see section 01 discrepancy flag vs 21b's 10-14/min, and the four classic distractor rates: 1-3 = long tide, 15-20 = respiratory rate, 60-100 = heart rate, 25-30 = too fast for any cranial rhythm). 10. 38F [described mid-vignette as a boxer], repeated blows to left side of face/head, then 2wk progressive LEFT LOWER EYELID myokymia marching down the face, no sensory loss/no true weakness → TEMPORAL BONE DYSFUNCTION (CN VII crowded in the facial canal/stylomastoid foramen after a lateral blow; motor-nerve irritation begins as hyperactivity/twitching, not weakness, and marches as more nerve is provoked). Distinguished from occipital/condylar dysfunction (wrong nerve group, CN IX-XII), superior vertical strain and left torsion (SBS-level findings with no mechanism to crowd CN VII), and SBS compression (a symmetric global lockout, not a one-sided nerve story). [Not in 21b — new, high- yield CN VII/temporal-bone teaching point.] 11. 54M, whiplash (rear-end collision), sphenoid base shifted INFERIORLY relative to occiput → INFERIOR VERTICAL STRAIN. [21b only cites birth molding as the classic vertical-strain mechanism; this adds whiplash/hyperextension as another recognized cause — named for the direction the sphenoid base moved, same rule as 21b.] 12. 36F, right wing superior+anterior, left wing inferior+posterior, AP-axis rotation (= right torsion) 149 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY → DIRECT technique correction = rotate the sphenoid TOWARD LEFT torsion (bring the right wing down, left wing up) — direct technique always engages the barrier by moving AWAY from the dysfunction. [Not in 21b — new treatment-technique content.] 13. 41M, tentorium cerebelli attaches to the petrous ridges of the temporal bones → a temporal-bone dysfunction most DIRECTLY affects TENTORIUM CEREBELLI tension (not frontal bone, nasal bone, sagittal suture, or falx cerebri — none of which the temporal bone attaches to); the tentorial notch carries CN III, brainstem, posterior cerebral arteries. [Not in 21b — RTM/tentorium content.] 14. 53M, cranial extension phase (vault narrows transversely, AP lengthens) → sacrum NUTATES (base anterior) via the dural tube ("S in Spine": spine straightens in extension). [Reinforces the PRM coupling detailed in section 01, which 21b only mentions in passing.] 15. 45F, chronic headache, right wing inferior/left wing superior, AP axis, no trauma (= left torsion) → INDIRECT (functional) technique correction = rotate FURTHER INTO left torsion (exaggerate the existing left-wing elevation), hold, let inherent forces produce the release — indirect technique always moves INTO the dysfunction. [Pairs with vignette 12 above; not in 21b.] 16. 40M, chronic headaches, SBS held in flexion with difficulty returning to extension, vault widened transversely → FLEXION DYSFUNCTION — a PRM phase-preference dysfunction (motion still present, just biased toward flexion), distinct from torsion (needs wing asymmetry), compression (needs total lockout/absent CRI), and vertical strain (needs trauma + directional sphenoid-base displacement). Extension dysfunction is the exact mirror. [New named category beyond the standard 5 dysfunctions — see section 06.] 17. 63M, high-speed MVC, forehead struck windshield, sphenoid base SUPERIOR relative to occiput, CRI diminished → SUPERIOR VERTICAL STRAIN. [Contrast flagged in section 05: 21b's classic windshield- blow teaching case is SBS COMPRESSION — same mechanism, different diagnosis depending on whether the finding is directional displacement (strain) vs. joint-jamming with a flattened global rhythm (compression).] 18. Fall on side of head (age given inconsistently as both 39 and 28 in the source text), sphenoid displaced LEFT relative to occiput → LEFT LATERAL STRAIN (a clean, unambiguous statement of the sphenoid's own direction — no finger-drift trap in this version). [Reinforces 21b's "name for the sphenoid" rule directly.] 19. 62M, during treatment the CRI slows, pauses for several seconds, then resumes with IMPROVED amplitude → STILL POINT (a therapeutic PRM reset; CV-4 is the classic technique to intentionally induce one). Distinguished from compression (a pre-existing, non-transient dysfunction), syncope (loss of consciousness), lateral strain (a static structural finding), and CN entrapment (produces focal neuro symptoms, not a CRI event). [Not in 21b — new concept; expands 21b's brief CV-4 mention.] 150 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY 20. 44M, anterior fontanelle palpation (soft, flat) → formed at the junction of SAGITTAL + CORONAL + METOPIC sutures, closes 18-24mo; contrasted with the posterior fontanelle (sagittal + lambdoid, at lambda, closes 2-3mo). [Duplicates this same source's own Bregma-landmark teaching (section 12) and vignette 4's fontanelle content — name-checked, not re-detailed.] 21. 45F, 3 days of right facial weakness (can't close right eye, right mouth droop), right temporal bone palpated in INTERNAL rotation → expect RIGHT (ipsilateral, not contralateral) occipitomastoid suture restriction — internal rotation of the temporal squama narrows the same-side occipitomastoid suture, crowding the adjacent stylomastoid foramen (CN VII exit). Distinguished from left occipitomastoid restriction (side-swap trap), SBS compression (symmetric, not unilateral), temporal bone in EXTERNAL rotation (stem says internal — the opposite direction would open, not narrow, the suture), and jugular foramen compression (CN IX-XI territory, not CN VII). [Extends vignette 10's CN VII/temporal- bone teaching with occipitomastoid-suture specificity; not in 21b.] 22. 61M, "what distinguishes physiologic from non-physiologic SBS dysfunctions?" → physiologic dysfunctions occur around the SBS's NORMAL AXES of motion (AP axis for torsion, two vertical axes for SB-R), preserve CRI/motion, and need no trauma; non-physiologic dysfunctions displace the bones outside their normal range, always require trauma, and restrict/eliminate motion (compression is the extreme, with CRI abolished). [Reinforces 21b's physiologic/non-physiologic split with a single cleaner discriminator statement — "normal axes of motion."] 23. Newborn after vacuum-assisted delivery, cranium cannot flex/extend at all, CRI absent → COMPRESSION; treatment = gentle LATERAL DECOMPRESSION (separate sphenoid and occiput at the SBS to restore space). HVLA is an ABSOLUTE CONTRAINDICATION in the neonatal cranium (unossified membranous-cartilage sutures; a thrust risks catastrophic damage) — neonatal cranial treatment is always gentle and follows inherent forces. Wrong-technique distractors: AP-axis rotation (torsion's treatment), exaggerating the compression (wrong direction even under indirect logic), inducing sidebending (SB-R's treatment). [21b covers CV-4/balanced ligamentous tension generally and "gentle, never force" — this adds the explicit neonatal HVLA contraindication and names the goal "separate the SBS."] 24. 64M, "what do the temporal bones do during flexion?" → EXTERNAL ROTATION (reinforces the paired-bone rule; also clarifies PRM motion is ROTATIONAL, not translational — temporal bones don't glide superiorly/inferiorly). [Reinforces section 01/02 above.] 25. 46F, SBS has no motion, cranium locked in flexion, vault widened transversely + AP shortened → this describes the FLEXION PHASE shape itself (widened + shortened = flexion; mirror = narrowed + lengthened = extension), distinguished from external rotation (the paired-bone COMPONENT of flexion, not the phase name), torsion (needs wing asymmetry 151 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY — this stem is symmetric), and compression (featureless rigid lockout with no describable shape, vs. this stem's specific wide/short shape). [Overlaps conceptually with vignette 16's flexion-dysfunction teaching — name-checked together.] 26. 48F, blow to right side of head, sphenoid displaced RIGHT + occiput displaced LEFT → RIGHT LATERAL STRAIN — named for the SPHENOID's direction (right) even though the occiput's leftward motion is also given; the trap here is naming it "left" by reflexively keying off the occiput instead of the sphenoid. [A stem-language variant of the lateral-strain naming trap, distinct from vignette 3's hand-motion decoder trap; reinforces 21b's "always name lateral strain by the sphenoid" rule.] 27. 37F, extension phase, sacrum nutates (base moves anterior) → the ilia simultaneously POSTERIORLY rotate at the SI joint (sacrum and ilia always move OPPOSITE to maintain SI-joint congruence, like meshing gears). [Not in 21b — extends the craniosacral coupling model to the ilium/SI joint; see section 11.] 28. 3yo boy, plagiocephaly, right occipital flattening + right ear displaced anteriorly → RIGHT OCCIPUT, CONDYLAR PART (the neonatal occiput has FOUR cartilage-separated parts; birth molding flattened one condylar part, rotating the occiput and secondarily pushing the ipsilateral temporal bone/ear forward — the ear shift is secondary, not the primary lesion). [Not in 21b — new neonatal-occiput anatomy; see section 13.] 29. Newborn, prolonged difficult forceps delivery, irritable, poor latch, rigid cranium, significantly diminished CRI, NO wing asymmetry → COMPRESSION (the only dysfunction with TOTAL lockout: zero flexion/extension AND zero asymmetry; torsion and SB-R both preserve motion and produce visible asymmetry/convexity, ruling them out; vertical strain would leave some directional displacement plus residual motion, also absent here). [Reinforces vignette 23 and 21b's compression teaching, adding "no asymmetry" as its own discriminator ruling out torsion/SB-R/vertical strain specifically, on top of "no motion" ruling out everything physiologic.] MEMORY HOOKS - PRM couplet, verbatim: "Flexion Flares" — paired bones externally rotate, vault widens, sacrum counternutates (base posterior). Extension reverses everything; "S in Spine" — the spine straightens as the sacrum nutates in extension. - CRI rate conflict to hold in mind for boards: THIS source tests 6-12 cycles/min; 21b cites 10-14/min. Whatever range your actual exam uses, always reject 1-3 (long tide), 15-20 (respiratory rate), and 60-100 (heart rate) as the classic distractor traps. 152 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - Torsion, verbatim: "Torsion Twists, named for the Top" (the HIGH wing names it — watch for stems that emphasize the low/other wing to bait the wrong side). - SB-R, verbatim: "SB-R: Same sideBend, named for the Round side" (the convexity names it). - Vertical strain notation, verbatim: "Sphenoid up is Superior, written SFOE" (Sphenoid Flexed, Occiput Extended = superior VS). Flip both letters for the mirror: SEFO = inferior VS. Sphenoid letter is always first and sphenoid always names the strain. - Lateral strain, verbatim: "Lateral strain makes a paralleLogram, and the sphenoid Leads the name" — but on the VAULT-HOLD HAND MODEL specifically, remember the inversion trap: little fingers point to the named side, index fingers are the decoy (index fingers sit on the sphenoid's greater wings, yet in this hand model it's the little-finger/opposite drift that tracks the name). - Compression, verbatim: "Compression = Crushed shut" — no axis, no direction, just a jammed SBS; classic image is a newborn skull squeezed through a difficult delivery, but ALWAYS confirm compression with the absence of both motion AND asymmetry, not the birth-trauma history alone. - Vertical strain vs lateral strain, verbatim hand-model contrast: "Vertical strain is the elevator. Lateral strain is the sliding door." (Elevator = index up while little down, bilateral/vertical. Sliding door = index and little drift opposite horizontal directions, a parallelogram.) - Squamous vs petrous, verbatim: "Squamous = squama = 'scale'... the thinnest part of the skull, exactly why a blow at the pterion tears the middle meningeal artery. Petrous = petra = 'rock'... the hardest bone in the body... Flat scale on the outside, rock on the inside." - Landmarks, verbatim: "Pterion = front (temple), four bones, H shape, middle meningeal artery. Asterion = back (behind the ear), three bones, three sutures. Bregma = top-front midline, old anterior fontanelle. Lambda = top-back midline, old posterior fontanelle." - Fontanelle sutures: anterior (bregma) needs all THREE — sagittal + coronal + metopic (closes 18-24mo); posterior (lambda) needs only TWO — sagittal + lambdoid (closes 2-3mo, much earlier). Leaving out the metopic suture from the anterior fontanelle is the single most common miss. - Craniosynostosis rule: growth is blocked PERPENDICULAR to the fused suture — sagittal fusion (most common) forces long/narrow growth (scaphocephaly); bicoronal fusion forces short/wide growth (brachycephaly), the opposite shape. - Direct vs indirect technique, one line: direct = away from the lesion, toward the opposite named position; indirect = into the lesion, exaggerating the same named position, then wait for release. 153 OMM / OMT BOARD REVIEW PART 6 — CRANIAL OSTEOPATHY - Still point vs compression, one line: a still point is a transient in-treatment CRI pause that resolves into BETTER motion; compression is a pre-existing dysfunction with permanently poor motion that does not self-resolve. - CN VII and the temporal bone, one line: facial nerve rides the petrous/squamous temporal bone and exits the stylomastoid foramen next to the occipitomastoid suture — a restricted (especially internally rotated) temporal bone on one side crowds CN VII on THAT SAME side, presenting first as eyelid myokymia (hyperactivity), not weakness. - Same mechanism, different diagnosis: a forehead/windshield blow can be EITHER compression (approximated joint, no axis, globally flattened rhythm, chronic headache + mood change) OR superior vertical strain (a specific directional sphenoid-base-superior displacement with a diminished-but-present rhythm) — always let the stated FINDING, not the mechanism alone, pick the diagnosis. The same logic applies to "birth trauma": total lockout + no asymmetry = compression; directional asymmetric shear with residual motion = vertical or lateral strain. 154 PART 7 — EXTREMITIES & PERIPHERAL NERVES PART 7 EXTREMITIES & PERIPHERAL NERVES IN THIS PART Fibular Head Dysfunctions Radial Head Dysfunctions Upper & Lower Extremity + ANS/Chapman Review Lower Extremity Nerve Injuries Brachial Plexus & Upper Extremity Nerve Injuries 155 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Fibular Head Dysfunctions FIBULAR HEAD SOMATIC DYSFUNCTION — THE SEESAW: PROXIMAL GOES ONE WAY, DISTAL GOES THE OTHER. Opener: basketball player inverts ankle, lateral knee pain 1 week later, ortho knee tests normal, fibular head resists anterior glide and sits POSTERIOR → caused by Posterior fibular head from the inversion. Mnemonic PIP: Posterior = Inversion + Plantarflexion. THE SEESAW MODEL: fibula = seesaw; interosseous membrane (tough fibrous sheet connecting tibia/fibula full length) = fulcrum. When proximal fibular head goes anterior, distal end (lateral malleolus) goes posterior — and vice versa, ALWAYS, no exceptions. Mnemonic: "Seesaw = see the opposite." Top goes left, bottom goes right, always. Anterior Fibular Head (LESS common) — Mechanism: Eversion injury (ankle rolls out). Proximal: fibular head anterior+lateral. Distal: lateral malleolus posterior+medial. Foot posture: Pronation (abduction+eversion+dorsiflexion = "DEA"). Palpation: more prominent anteriorly at knee. Pain: lateral knee pain, peroneal nerve stretch. Posterior Fibular Head (MORE common) — Mechanism: Inversion injury (ankle rolls in). Proximal: fibular head posterior+medial. Distal: lateral malleolus anterior+lateral. Foot posture: Supination (adduction+inversion+plantarflexion = "PIP"). Palpation: more prominent posteriorly at knee. Pain: posterolateral knee pain. KEY FACT: foot tells you the ankle, ankle tells you the knee. Supination (foot turned in) = posterior fibular head. Pronation (foot turned out) = anterior fibular head. PIP = Posterior fibular head = Inversion + Plantarflexion (supination ease). DEA = Dorsiflexion + Eversion + Abduction = anterior fibular head (pronation ease). Supination ("inward roll") = Add + Inv + PF: Adduction (toes point medially), Inversion (sole faces medially), Plantarflexion (foot points down). Pronation ("outward roll") = Abd + Ev + DF: Abduction (toes point laterally), Eversion (sole faces laterally), Dorsiflexion (foot pulls up). BOARD TRAP: exam gives DISTAL findings (lateral malleolus position) and asks about PROXIMAL end. Use seesaw rule — if "lateral malleolus is posterior," fibular head is ANTERIOR. Tests whether you know the seesaw model vs. just memorized proximal findings. 156 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES DIAGNOSIS STEP BY STEP (palpation comparison at proximal tibiofibular joint — synovial plane joint, slight gliding motion, just below/lateral to tibial plateau): 1. Palpate fibular head bilaterally — compare anterior vs posterior prominence. Naming = direction of displacement ("more prominent anteriorly" = anterior fibular head SD). 2. Check distal end (confirm with seesaw) — palpate lateral malleolus; if fibular head anterior, malleolus should be posterior vs other side. If both ends point same direction, recheck — the seesaw doesn't lie. 3. Check foot posture — posterior fibular head → foot supination (PIP). Anterior → foot pronation (DEA). Third confirmation. TREATMENT — Muscle Energy (MET), DIRECT technique (push toward barrier, not away). Both anterior and posterior fibular head dysfunctions use MET. Direct technique = push TOWARD normal position (correcting the displacement, not pushing further into it). Anterior Fibular Head MET: (1) Wrap hands around proximal fibula. (2) Push fibular head POSTERIORLY. (3) Patient dorsiflexes + everts foot against resistance (activates peroneals, which pull fibula posterior). (4) Hold 3-5 sec → relax → take up slack. (5) Repeat 3-5x. Posterior Fibular Head MET: (1) Wrap hands around proximal fibula. (2) Push fibular head ANTERIORLY. (3) Patient plantarflexes + inverts foot against resistance (activates muscles pulling fibula anterior). (4) Hold 3-5 sec → relax → take up slack. (5) Repeat 3-5x. KEY FACT: patient pushes TOWARD EASE during isometric contraction. Anterior fibular head (pronated foot ease) → patient pushes into dorsiflexion+eversion. Posterior fibular head (supinated foot ease) → patient pushes into plantarflexion+inversion. Patient's contraction matches the ease/dysfunction posture. BOARD TRAP (setup detail): Posterior fibular head → contact the POSTERIOR fibular head + EXTERNALLY rotate the leg (drives head to anterior barrier). Anterior fibular head → contact the ANTERIOR fibular head + INTERNALLY rotate the leg (drives head to posterior barrier). Physician's MCP joint of index finger contacts the named aspect of the fibular head. MET MECHANISM CHAIN: Type = Direct (push toward corrective barrier). Anterior head → push posteriorly (direct = toward normal). Patient action = isometric contraction toward EASE (anterior head = DF+eversion; posterior head = PF+inversion). Mechanism for advancing after each contraction = Post-Isometric Relaxation (PIR) — Golgi tendon organ fires during contraction, then briefly inhibits the muscle on release; that window = your chance to advance. PALPATION EXAM FRAMEWORK: MOB = Motion restriction, Orientation of fibular head, Bony landmark prominence. TART = Tissue texture change, Asymmetry, Restriction of motion, Tenderness. Compare fibular heads bilaterally; dysfunctional side more prominent in direction of displacement; check lateral malleolus to confirm seesaw. 157 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES HVLA vs MET: MET = direct, patient isometrically resists in direction of correction, 3-5 sec x 3-5 reps, works via PIR. HVLA = high velocity low amplitude thrust, direct technique, fast thrust toward restrictive barrier; contraindicated if hypermobility, fracture, or osteoporosis present. Boards almost ALWAYS test MET for fibular head (not HVLA). DECISION TREE: Lateral knee pain after ankle injury → palpate fibular head bilaterally. - More prominent ANTERIORLY → Dx: Anterior Fibular Head SD. Confirm: lateral malleolus posterior vs other side. Foot: pronation (abd+ev+DF, "DEA"). Treat: MET — contact anterior fibular head with MCP of index finger, internally rotate leg to posterior barrier, patient dorsiflexes+everts against resistance, hold 3-5 sec x3-5. - More prominent POSTERIORLY → Dx: Posterior Fibular Head SD. Confirm: lateral malleolus anterior vs other side. Foot: supination (add+inv+PF, "PIP"). Treat: MET — contact posterior fibular head with MCP of index finger, externally rotate leg to anterior barrier, patient plantarflexes+inverts against resistance, hold 3-5 sec x3-5. - Fibular heads SYMMETRIC → No fibular head SD; check other causes: LCL sprain, proximal tibiofibular joint pathology, common peroneal nerve entrapment, proximal tibia fracture. ANATOMY NOTE: common peroneal nerve wraps around fibular head — anterior SD can stretch it. KEY VIGNETTE TEACHING POINTS - Posterior fibular head treated (push anteriorly, patient plantarflexes+inverts against resistance x5 cycles), becomes symmetric on reassessment: mechanism = Post-isometric relaxation allowed taking up slack past restrictive barrier (NOT HVLA, NOT that active motion directly moved it, NOT simple muscle fatigue). - Anterior fibular head MET, able to advance further posteriorly during relaxation phase: mechanism = Post-isometric relaxation — Golgi tendon organ inhibits muscle after contraction (NOT reciprocal inhibition of antagonists, NOT muscle fatigue, NOT ligament creep). - Posterior fibular head (supinated foot) — most appropriate treatment contraction = Plantarflexion and inversion (matches PIP/ease posture). - Anterior fibular head found at knee — most likely foot finding = Pronated (abd+inv+DF... note: DEA = dorsiflexion+eversion+abduction). - Left lateral malleolus more posterior than right (seesaw model) → most likely: Left ANTERIOR fibular head WITH PRONATED foot (malleolus posterior = fibular head anterior via seesaw; anterior fibular head pairs with pronation). - Correcting fibular head dysfunction reduces future ankle sprains because: normalizes foot posture from supination to neutral, reducing the inversion bias (not direct ligament strengthening, not isolated dorsiflexion increase). - Anterior fibular head MET, after 3 reps tenderness improved but head still slightly anterior → most appropriate next step = continue with 2 more repetitions of the same MET (not switch to HVLA, not switch to counterstrain, not just ice/wait). 158 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES - After successful MET correcting posterior fibular head (malleolus was anterior), fibular head now symmetric → lateral malleolus change = moved from ANTERIOR to NEUTRAL (seesaw model: as fibular head corrects to neutral, malleolus follows to neutral too, not further in either direction). 159 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Radial Head Dysfunctions RADIAL HEAD SOMATIC DYSFUNCTION — ANTERIOR OR POSTERIOR: ONE RULE, TWO DIRECTIONS, ONE JOINT. Opener: man fell backward onto outstretched right hand, palm facing UP at impact, 2 days lateral elbow ache, cannot pronate (turn palm down) to type. Supination full/pain-free, pronation stops early with firm endpoint, radial head prominent ANTERIORLY → Anterior radial head dysfunction. ANATOMY: Forearm = radius (lateral/thumb side, ONLY bone of forearm that rotates around the other) + ulna (medial/pinky side, forms main elbow hinge with humerus). Proximal radioulnar joint = radial head sits in notch on side of ulna, held by annular ligament (ring of fibrous tissue wrapping radial head against radial notch of ulna — "the gate"; when it slips, radial head pops out = nursemaid's elbow). Radius rotates, ulna stays still (like a doorknob) — distal radius drags wrist along. If radial head can't glide, forearm can't rotate. THE DIRECTIONAL RULE (one line): Dysfunction is named for the direction the head WENT — that direction is also where motion is FREE. The OPPOSITE direction is the restrictive barrier (where you treat). Mnemonic: Anterior head loves Supination. Posterior head loves Pronation. "A&S, P&P." BOARD TRAP: students name dysfunction by where it's RESTRICTED — WRONG. Somatic dysfunctions are named by direction of EASE. If pronation restricted and supination free, head is jammed ANTERIOR, not posterior. Name where it WENT, not where it can't go. Anterior radial head — Stuck SUPINATED. Free: supination & anterior glide. Restricted: pronation & posterior glide. Etiology: forced supination — falling backward onto a supinated forearm (palm-up FOOSH). Palpation: radial head prominent on ANTERIOR aspect of elbow. Posterior radial head — Stuck PRONATED. Free: pronation & posterior glide. Restricted: supination & anterior glide. Etiology: forced pronation — falling forward onto a pronated forearm (palm-down FOOSH). Palpation: radial head prominent on POSTERIOR aspect of elbow. Anterior Posterior Pronation Restricted Free Supination Free Restricted Anterior glide of head Free Restricted Posterior glide of head Restricted Free 160 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Trauma history Forced supination (palm-up fall) Forced pronation (palm-down fall) DIAGNOSE IN THREE MOVES 1. Patient asked to pronate (palm down), winces/stops halfway → pronation restricted. (Mnemonic: palm-DOWN = pronation, "pour soup you'd spill it"; palm-UP = supination, "carry soup in supinated hand.") 2. Apply directional rule: pronation restricted = stuck supinated = head jammed ANTERIOR (named for direction of ease/free motion — supination). 3. Confirm with palpation: radial head prominent on ANTERIOR aspect of elbow. Diagnosis: anterior radial head SD. Treatment goal: restore pronation by moving head posteriorly. CROSS-DOMAIN CONNECTION: wrist pain on same side may be related — jammed proximal radial head can cause ipsilateral wrist symptoms via force transmission down radius + interosseous membrane. Check wrist when elbow is chief complaint and vice versa. MUSCLE ENERGY (direct): position joint at barrier, patient pushes AWAY from it (toward ease), isometric. Correction path: (1) Take forearm to restrictive barrier. (2) Patient pushes back toward ease direction 3-5 sec isometric. (3) Patient relaxes; take up new slack into more of the barrier. (4) Repeat 3-5 reps, recheck motion. Anterior dysfunction: Physician PRONATES to barrier; patient SUPINATES against resistance. Posterior dysfunction: Physician SUPINATES to barrier; patient PRONATES against resistance. Mechanism: post-isometric relaxation lets radial head glide to side OPPOSITE the dysfunction. HVLA (direct): stack joint to barrier, fast short thrust through it. Correction path: (1) Cradle forearm, thumb on side OPPOSITE the dysfunction. (2) Stack to restrictive barrier, loading joint up to it. (3) Thrust through barrier with posterior or anterior glide vector — short, fast, controlled. (4) Cavitation nice but not required; recheck motion. Anterior dysfunction: Thumb on POSTERIOR radial head, stack pronation, thrust posterior. Posterior dysfunction: Thumb on ANTERIOR radial head, stack supination, thrust anterior. Contraindicated: fracture, instability, infection, severe osteoporosis, acute post-op. Pediatric nursemaid's elbow gets reduction maneuver, NOT HVLA. COUNTERSTRAIN (indirect): position INTO ease until tender point softens, hold 90 sec, slow return. Correction path: (1) Find tender point, light pressure, patient rates 10/10. (2) Move joint INTO direction of ease until tender point drops to ≤2/10. (3) Hold 90 sec, minimal talking, let tissue settle. (4) Return to neutral SLOWLY (fast return re-triggers spasm). Anterior dysfunction: Tender point at anterior radial head; position in supination + mild flexion. 161 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Posterior dysfunction: Tender point at posterior radial head; position in pronation + mild extension. Best for: acute, painful, or fragile patient (gentle, indirect, almost universally safe). NURSEMAID'S ELBOW (Pulled Elbow) — pediatric variant, different mechanism, same joint: Mechanism: toddler jerked up by wrist/hand while forearm PRONATED. Annular ligament (loose/stretchy in kids) — the yank slides head distally, annular ligament slips OVER the top of radial head and gets pinched in joint. NOT a fracture, NOT a true dislocation — a subluxation with ligament in wrong place. Classic stem: 3yo lifted over curb by one hand, refuses to use right arm, holds close to body slightly flexed, forearm PRONATED, no swelling, no deformity, normal X-ray. Age 1-4. Mechanism = longitudinal pull on pronated forearm. Position giveaway: pronated + slightly flexed, refuses use, no swelling, no fracture. DON'T CONFUSE: nursemaid's elbow has NO swelling and NO point tenderness. If stem mentions either → think supracondylar fracture instead (especially after fall onto outstretched hand) — get X-ray, don't reduce a fracture by pronating it. Reduction techniques (current evidence favors hyperpronation — faster, less painful, higher first-attempt success; supination-flexion is older method): Hyperpronation (preferred): cradle elbow with one hand, thumb over radial head; hold wrist with other hand; hyperpronate forearm (turn palm down, keep going past neutral pronation); may feel/hear small click; child usually uses arm again within 5-30 min. Supination & Flexion (alternate): cradle elbow, thumb over radial head; hold wrist; fully supinate forearm; then flex elbow all the way to shoulder; listen/feel for click; same recovery window. No splint/sling needed after successful reduction. Counsel parent: avoid yanking arm to prevent recurrence — ligament stays lax until ~age 5 (repeat customers common). Mnemonic: "Pulled Pronated." Etiology = pull on pronated forearm; treatment = MORE pronation (hyperpronation). Mechanism rhymes with treatment. NURSEMAID vs ADULT RADIAL HEAD DYSFUNCTION: Nursemaid's elbow = TRUE subluxation with annular ligament in wrong place, single-event mechanical fix. Adult anterior/posterior radial head SD = POSITIONAL restriction, not a subluxation — a movement pattern that responds to OMM. KEY VIGNETTE/BOARD DRILL TEACHING POINTS - Naming rule confirmed: dysfunction named for direction radial head WANTS to go = direction motion is FREE (not the restricted direction, not the etiology alone, not simply right/left side). 162 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES - Fall backward onto outstretched palm-up hand, restricted pronation, radial head full anteriorly, intact wrist extension strength → Anterior radial head, restricted pronation (the two must pair correctly — anterior=restricted pronation/free supination; NOT anterior with restricted supination, which would be an internally-inconsistent pairing). - RA patient (methotrexate) with BOTH pronation AND supination restricted, radial head erosion + joint space narrowing on X-ray, no fall history → this is NOT a simple somatic dysfunction — it's Degenerative joint disease of the proximal radioulnar joint secondary to RA (bilateral/global restriction with structural erosion rules out a single-direction positional SD). - Lateral elbow pain worse with gripping/twisting doorknobs, point tenderness at LATERAL EPICONDYLE, resisted wrist extension reproduces pain, pronation/supination FULL and pain-free → Lateral epicondylitis (tennis elbow), NOT a radial head somatic dysfunction (the key differentiator: full painless rotation rules out radial head SD; pain reproduced by resisted wrist extension + epicondyle tenderness = tendinopathy, not joint dysfunction). - Internally-contradictory finding presented ("radial head is posterior," "pronation is restricted," "supination is free") — the error: posterior dysfunction means pronation is FREE and supination is RESTRICTED; the student reversed the motion findings (not that posterior dysfunctions don't exist, not a palpation impossibility). 163 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Upper & Lower Extremity + ANS/Chapman Review OMM · UPPER & LOWER EXTREMITY + ANS/CHAPMAN REVIEW Upper and Lower Extremity OMM: Joint Dysfunctions (comprehensive integrative review page) === UPPER EXTREMITY === ROTATOR CUFF (SItS): Supraspinatus (initiates abduction, first 15°), Infraspinatus + Teres minor (external rotation), Subscapularis (internal rotation). All four stabilize humeral head in the shallow glenoid socket. Supraspinatus tears FIRST because it runs through the subacromial space (between acromion and humeral head) — repetitive pinching with every arm raise → fraying → tear over decades. Impingement tests (Neer, Hawkins) compress supraspinatus against acromion; empty can test isolates it specifically. SHOULDER ADDUCTORS: Pectoralis major (lateral & medial pectoral nerves, pulls from front); Latissimus dorsi (thoracodorsal nerve, pulls from behind). FLEXORS/EXTENSORS/ABDUCTORS: Primary flexor = anterior deltoid. Primary abductor = middle deltoid. Primary extensors = posterior deltoid, teres major, latissimus dorsi. Normal abduction = 180°. SUBCLAVIAN VESSELS & SCALENES: Artery passes BETWEEN anterior and middle scalenes (same path as brachial plexus); Vein passes ANTERIOR to anterior scalene (separate path). This creates 3 TOS compression zones. THORACIC OUTLET SYNDROME (TOS) — three compression zones along the neurovascular bundle: - Scalene triangle (between anterior/middle scalenes): tested by Adson test (deep breath + head turn TOWARD affected side) and Reverse Adson (head turn away). - Costoclavicular space (between clavicle and 1st rib): tested by Military posture test (retract + depress shoulders). - Interpectoral space (under pec minor): tested by Wright's test (arm hyperabduction) and Roos test (arms abducted, elbows flexed, open/close hands x3 min). BOARD TRAP: positive provocative tests occur in 25% of HEALTHY people — tests show the anatomy ALLOWS compression, not that compression IS causing symptoms; imaging needed to confirm. SHOULDER DISLOCATION: Anterior (95%, most common) — mechanism = fall on outstretched hand (abduction + external rotation levers humeral head forward; posterior structures weaker than anterior); nerve at risk = axillary nerve (deltoid paralysis, "regimental badge" lateral shoulder numbness). Posterior — etiology = SEIZURES (also electrocution; posterior muscles overpower anterior); X-ray = "light bulb sign." 164 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES TERMINOLOGY: Subluxed = partially out, surfaces still touching, often self-reduces. Dislocated = completely out, zero contact, needs reduction. Separated = AC joint ligaments torn, clavicle floats up (DIFFERENT joint entirely). APPREHENSION TESTS (test INSTABILITY/re-dislocation risk, NOT acute dislocation): Anterior apprehension — shoulder abducted 90°, externally rotated; positive = feels like it will pop out front. Posterior apprehension — shoulder flexed 90°, internally rotated, adducted; positive = feels like it will slide out back. IMPINGEMENT TESTS: Neer — forward flex arm past 90°, push down; pain = positive. Hawkins — arm 90° forward flex, internally rotate; pain = positive (MORE SENSITIVE than Neer). Empty can (Jobe's) — arms 90° abduction, 30° forward, thumbs down, resist downward; pain/weakness = supraspinatus. Drop arm — abduct 90°, slowly lower; can't control descent = TEAR (get MRI). BICEPS TENDON TESTS: Speed's test — shoulder flexed 90°, elbow flexed, forearm supinated, resist shoulder flexion; pain = biceps tendinitis. Yergason's test — elbow flexed 90° at side, forearm pronated, patient supinates against resistance; pain = biceps tendinitis. OTHER: Painful arc syndrome = another name for supraspinatus tendonitis. Adhesive capsulitis (frozen shoulder) = develops from prolonged immobilization or guarding. BRACHIAL PLEXUS INJURIES - Erb-Duchenne palsy (upper trunk, C5-C6): "Waiter's tip" position — adducted, internally rotated, elbow extended, forearm pronated. Mechanism: excessive lateral neck flexion AWAY from shoulder (head one way, shoulder other way) stretches C5-C6 roots (deltoid, biceps, brachialis, brachioradialis, supraspinatus, infraspinatus all lost) — gravity wins because arm-elevating muscles are dead. "Baby's not moving their arm" after delivery = Erb's until proven otherwise. - Klumpke's palsy (lower trunk, C8-T1): Claw hand — MCP extended, IP joints flexed, wrist flexed. Mechanism: arm yanked UPWARD during delivery (opposite of Erb's) stretches C8-T1 roots (all intrinsic hand muscles lost — lumbricals, interossei — long flexors dominate unopposed). May also see Horner syndrome (ptosis, miosis, anhidrosis) because T1 root sits next to the sympathetic chain — one traction injury, two syndromes. - Winging of the scapula: nerve = Long thoracic nerve; muscle = serratus anterior. Push against a wall → scapula pops off the back. HAND NERVE INJURIES - Ulnar nerve = claw hand: can't EXTEND 4th/5th fingers (interossei + lumbricals 3-4 lost → extensors hyperextend MCPs, flexors curl IPs). Froment's sign: hold paper between thumb/index — without adductor pollicis (ulnar), compensates by flexing thumb IP; flexed IP = positive Froment's = ulnar nerve dead. 165 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES - Median nerve = Pope's hand/Hand of Benediction: can't FLEX digits 1-3 when making a fist (FDS + part of FDP to index/middle lost; digits 4-5 flex normally via ulnar). BOARD TRAP: different test position than ulnar claw — ulnar claw tests EXTENSION, Pope's hand tests FLEXION; same-looking deformity type, opposite test, opposite nerve. - Radial nerve = wrist drop: controls ALL wrist/finger extensors (ECRB, ECRL, ECU, EDC); kill it and flexors go unopposed, wrist drops. - Ape hand (chronic carpal tunnel): thenar eminence wasted, thumb stuck adducted, can't oppose — long-standing median compression starves thenar muscles (APB, opponens pollicis, FPB), atrophy over months/years. CARPAL TUNNEL SYNDROME: numbness in thumb/index/middle/lateral half of ring finger, worse at night (wrist flexes during sleep). Mechanism: tight space (carpal bones floor, flexor retinaculum roof), repetitive motion swells tendons, median nerve crushed. SPARED: palmar cutaneous branch exits BEFORE the tunnel — base of thenar eminence sensation stays normal (numb fingertips + normal palm = CTS). Chronic muscles affected: thenar (APB, opponens, FPB) + lumbricals I-II. TESTS: Tinel's (tap over carpal tunnel, tingling into median fingers = positive); Phalen's (flex both wrists fully/reverse prayer, hold 30-60 sec, reproduces paresthesias = positive); Reverse Phalen's/Prayer test (extend both wrists fully, same principle). Long-standing CTS → thenar atrophy → ape hand. ELBOW: Tennis elbow = Lateral epicondylitis (wrist EXTENSORS attach laterally, repetitive extension overload). Golfer's elbow = Medial epicondylitis (wrist FLEXORS attach medially, repetitive flexion overload). Mnemonic: "An EXTended game of tennis will ruin the Lawn" (EXTension=Lateral); "A FLexible game of golf allows Mulligans" (FLexion=Medial). The sport doesn't matter — the movement does. CARRYING ANGLE: intersection of humerus axis and forearm axis. Normal: males 5°, females 10-12°. Cubitus valgus >15° (ABduction of ulna); cubitus varus <3° (ADduction of ulna). Mnemonic: "Valgus/valgum has MORE LETTERS = bigger angle = knocked together" (same at knee: genu valgum=knock-knees, genu varum=bow-legs). WRIST/HAND DISORDERS: De Quervain's tenosynovitis — pain at radial styloid, positive Finkelstein's test (fist with thumb tucked inside, ulnar deviate wrist → pain at radial styloid); muscles = APL + EPB (1st dorsal compartment), mnemonic "All Peanut Lovers Eat Peanut Butter" = APL, EPB. Swan neck deformity: PIP hyperextension + DIP flexion (RA attacks flexor sheath/pulleys). Boutonniere deformity: PIP flexion + DIP extension (RA destroys central slip of extensor tendon at PIP, DIP compensates by hyperextending — "like pushing a button"). Dupuytren's contracture: palmar fascia contracture, ring/pinky fingers flex first and won't straighten (abnormal fibroblast activity, collagen cords shorten). UPPER EXTREMITY DERMATOMES (lateral→medial as you descend cervical spine): C4=top of shoulder; C5=lateral arm/deltoid; C6=lateral forearm+thumb+index (radial side); C7=middle finger; C8=medial forearm; T1=medial arm/axilla. 166 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES REFLEXES: Biceps=C5, Brachioradialis=C6, Triceps=C7, Finger flexors=C8. BOARD TRAP: reflex map (motor root) is DIFFERENT from dermatome map (sensory root) — biceps reflex is C5, not C6; don't confuse them. FOREARM MUSCLES/INNERVATION: Elbow extension = Triceps (Radial, C7). Elbow flexion = Brachialis NOT biceps (Musculocutaneous, C5-C6). Supination elbow-flexed = Biceps brachii (Musculocutaneous, C5-C6). Supination elbow-extended = Supinator (Radial, C6-C7). Pronation = Pronator teres + quadratus (Median, C6-C7). BOARD TRAP: supination has DUAL innervation (musculocutaneous + radial) so complete loss is rare; pronation has SINGLE innervation (median only) — one nerve injury kills both pronators, no redundancy. RADIAL HEAD DYSFUNCTIONS — MASTER RULE: named for FREEDOM/EASE of motion (not restriction). - Anterior radial head: stuck anteriorly, free in supination, RESTRICTED in pronation (pronation requires posterior movement, stuck anteriorly can't go back). Etiology: falling BACKWARDS onto a SUPINATED forearm. HVLA: flexion + supination + adduction. - Posterior radial head: stuck posteriorly, free in pronation, RESTRICTED in supination (supination requires anterior movement, stuck posteriorly can't come forward). Etiology: falling FORWARD onto a PRONATED forearm. HVLA: extension + pronation + abduction. [See file 15_radial-head.txt for a deeper dedicated treatment of this topic including Nursemaid's elbow.] ULNAR DYSFUNCTIONS: named for position of the DISTAL ulna. Olecranon and distal ulna move in OPPOSITE directions; wrist and ulna move in OPPOSITE directions. - ADDuction of ulna: decreased carrying angle + restricted wrist/hand adduction. Distal ulna deviates medially (=ADDuction), olecranon deviates laterally (opposite). Carrying angle decreases (cubitus varus). - ABDuction of ulna: increased carrying angle + restricted olecranon lateral glide. Distal ulna deviates laterally (=ABDuction), olecranon deviates medially (opposite). Carrying angle increases (cubitus valgus). === LOWER EXTREMITY === KNEE FLEXORS (hamstrings): Biceps femoris (lateral), semitendinosus + semimembranosus (medial). Gracilis and sartorius ASSIST but are NOT hamstrings. All three hamstrings also EXTEND the hip. QUADRICEPS: Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius — all four extend the knee. BOARD FAVORITE: only rectus femoris flexes the hip (only quad crossing the hip joint). HIP ROM: Flexion 130-140°, Extension 20-30°, Abduction 40-50°, Adduction 30-45°, Internal rotation 30-45°, External rotation 10-15°. 167 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES CRUCIATE LIGAMENTS: named for TIBIAL attachment. ACL (femoral posterolateral → tibial anteromedial) prevents anterior tibial translation. PCL (femoral anteromedial → tibial posterolateral) prevents posterior tibial translation. COLLATERAL LIGAMENTS: MCL (tibial collateral) attaches to MEDIAL MENISCUS (why MCL injuries often tear meniscus too — "unhappy triad" = ACL + MCL + medial meniscus). LCL (fibular collateral) does NOT attach to a meniscus (popliteus gap). KNEE TESTS: ACL — Anterior drawer (knee 90°, pull tibia forward) and Lachman's (knee 20-30°, pull tibia forward, MORE ACCURATE — mnemonic: "Lachman" first 3 letters A-C-L = ACL). PCL — Posterior drawer (knee 90°, push tibia backward) and Sag sign/Godfrey's (hip AND knee 90°, support heel, gravity sags tibia posteriorly, compare sides). Q ANGLE: line from ASIS through patella center to tibial tuberosity. Normal 10-15° (females higher, 15-17°). Increased (>15°) = Genu valgum (knock-knees); decreased (<10°) = Genu varum (bow-legs). Mnemonic: "Valgum = more LETTERS = bigger angle = knees stuck together." OMM correlation: high Q angle + tight IT band + weak VMO = patellofemoral pain syndrome. Valgum → lateral compartment OA risk; Varum → medial compartment OA risk. FEMORAL NECK-SHAFT ANGLE: normal 130-135°. Coxa vara <130° (neck bends down); Coxa valga >135° (neck angles out). LOWER EXTREMITY DERMATOMES: L5=dorsum of foot/first web space; S1=lateral foot and sole; S2=posterior thigh and heel. S1 radiculopathy (L4-L5... actually L5-S1 disc) = lateral foot pain + weak plantarflexion; test = stand on tiptoes, can't rise = S1 root compression (gastrocnemius is S1). C6 RADICULOPATHY (complete picture, cross-reference to cervical spine): Sensory = lateral arm, thumb side of forearm, thumb+index dorsal. Motor = wrist extensors (wrist drop), biceps (weak flexion). Reflex = brachioradialis decreased/absent. BOARD TRAP: biceps reflex=C5, brachioradialis=C6, triceps=C7 — don't mix up. NEURAL FORAMINA NARROWING TESTS: Spurling test (extend neck + bend toward painful side + axial compression → reproduces radicular pain). Neck distraction (pull head upward → relieves pain, confirms nerve is the source). Imaging: X-ray (bone spurs), MRI (disc bulge/nerve compression), CT (bone detail), EMG/NCS (confirms nerve dysfunction). === AUTONOMIC NERVOUS SYSTEM OVERVIEW (integrative review) === Two divisions, both require a 2-neuron chain (preganglionic → ganglion → postganglionic): Sympathetic Parasympathetic Origin T1-L2 (thoracolumbar) CN III, VII, IX, X + S2-S4 (craniosacral) Ganglion location Near spinal cord (paravertebral chain) Near target organ Preganglionic Short Long 168 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Sympathetic Parasympathetic Postganglionic Long Short NT at ganglion ACh (nicotinic) ACh (nicotinic) NT at target NE (adrenergic) ACh (muscarinic) EXCEPTION: Adrenal medulla — preganglionic SNS goes DIRECTLY, no postganglionic neuron, secretes epi/NE straight into blood. SYMPATHETIC INNERVATION BY ORGAN (spinal levels, splanchnic nerve, ganglion) - Heart: T1-T5, cardiac splanchnics, cervical ganglia/upper sympathetic chain. - Lungs/bronchi: T2-T7, pulmonary splanchnics, upper sympathetic chain. - Upper GI (esophagus/stomach/SI/liver/pancreas): T5-T9, greater splanchnic, celiac ganglion. - Middle GI (transverse colon): T10-T11, lesser splanchnic, superior mesenteric ganglion. - Lower GI (descending/sigmoid/rectum): T12-L2, least splanchnic, inferior mesenteric ganglion. - Kidneys/adrenals/ureters: T10-L1, lesser+least splanchnic, celiac+renal ganglia. - Bladder/gonads/uterus: T10-L2, lumbar splanchnics, inferior mesenteric ganglion. Mnemonic: "Greater (T5-9 → celiac) → Lesser (T10-11 → SMG) → Least (T12-L2 → IMG). The numbers go up as you go down the gut." PARASYMPATHETIC INNERVATION BY ORGAN: CN III (oculomotor) → pupil constriction/miosis, lens accommodation. CN VII (facial) → lacrimal gland, submandibular+sublingual salivary glands. CN IX (glossopharyngeal) → parotid salivary gland. CN X (vagus) → heart, lungs, esophagus, stomach, small intestine, ascending+transverse colon, liver, pancreas (everything through mid-gut). S2-S4 (pelvic splanchnics) → descending colon, sigmoid, rectum, bladder, erectile tissue, uterus, lower ureters. RULE: vagus handles everything EXCEPT lower GU/GI (below mid-transverse colon) — that's S2-S4 pelvic splanchnics' territory. Organ SNS effect PSNS effect Pupil Dilation (mydriasis), α1 Constriction (miosis), M Heart rate ↑HR (tachycardia), β1 ↓HR (bradycardia), M Bronchi Dilation, β2 Constriction+secretion, M3 GI motility ↓motility, sphincter contraction, α1 ↑motility, sphincter relaxation, M 169 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Organ SNS effect PSNS effect Bladder detrusor Relaxation, β2 Contraction (urination), M Bladder sphincter Contraction (holds urine), α1 Relaxation (lets urine out), M Sweat glands Secretion — ACh on M receptors (EXCEPTION: sympathetic but cholinergic!) — Blood vessels Vasoconstriction α1; vasodilation β2 — Salivary glands Thick saliva, α1 Watery saliva, M Adrenal medulla Epi/NE release (direct ACh, no postganglionic) — BOARD TRAP: sweat glands are SNS innervated but CHOLINERGIC (classic exception) — anticholinergics (atropine) cause anhidrosis even though the pathway is sympathetic. ADRENERGIC RECEPTOR QUICK REFERENCE: α1 (vascular smooth muscle, bladder sphincter, pupil dilator) → vasoconstriction, sphincter contraction, mydriasis. α2 (presynaptic nerve terminals, platelets) → inhibits NE release (negative feedback), platelet aggregation. β1 (heart, kidney JGA) → ↑HR, ↑contractility, renin release. β2 (bronchi, uterus, peripheral vessels, bladder wall) → bronchodilation, uterine relaxation, vasodilation. Mnemonic: "β1 = heart (1 heart). β2 = lungs+vessels (2 of those). α1 = squeeze (constrict). α2 = autoreceptor (inhibit more release)." VISCEROSOMATICS & CHAPMAN POINTS (integrative summary — cross-ref file 10_viscerosomatic-reflexes.txt for the dedicated deep dive): Viscerosomatic reflex = organ dysfunction → afferent signals → spinal cord → sensitizes corresponding somatic segment → tenderness/hypertonicity/skin changes at the body wall matching the organ's spinal level. Chapman points = anterior (chest/abdomen wall) and posterior (paraspinal) points, each mapping to a specific organ, used for BOTH diagnosis and treatment. KEY ANTERIOR CHAPMAN POINTS: 2nd ICS near sternum = Thyroid. 2nd ICS mid-clavicular = Sinuses/upper respiratory. 3rd ICS = Lungs/bronchi. 4th ICS = Liver(R)/Gallbladder(R). 5th-6th ICS right = Liver/Gallbladder. 6th ICS left = Stomach/Spleen. 7th ICS = Spleen(L)/Pancreas. Lateral IT band (midway, thigh) = Colon/large intestine. Pubic ramus = Bladder/Prostate/Uterus. BOARD PEARL: 2nd ICS near sternum = THYROID — fatigue+weight gain+constipation+tender nodule there → think hypothyroidism → elevated TSH. CLINICAL APPLICATION: find anterior point → correlate with organ → look for matching symptoms. Treatment = sustained rotary pressure on anterior point, confirm resolution at posterior point. Posterior points lie near transverse processes at the organ's corresponding spinal level. Points feel like a small tender firm nodule ("like a small BB under the skin"). 170 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES INCREASING sympathetic tone: Rib raising (stretches paravertebral muscles, mobilizes ribs, increases SNS outflow — used in pneumonia with respiratory compromise to improve respiratory drive); Chapman point stimulation (rotary pressure activates viscerosomatic reflex arc); Paraspinal ganglionic stimulation (direct pressure on sympathetic chain). DECREASING sympathetic tone: Paraspinal inhibition (sustained pressure on paravertebral muscles, decreases SNS tone — opposite of rib raising); Still technique (inhibitory, calms tissue, decreases SNS activation — useful for reducing sympathetic overdrive); NOTE the paradox — at LOWER rib levels (11-12), Still technique decreases SNS output to the organ (rib raising generally increases SNS, but this specific low-rib Still technique context decreases it). INCREASING parasympathetic tone: OA-AA release/Suboccipital release (targets vagus nerve at jugular foramen exit, C0-C1 level — increases vagal PSNS output to thorax/abdomen); C1-C2 manipulation (same vagal effect as OA-AA release); Sacral techniques (target S2-S4 pelvic splanchnics — increases PSNS to lower GU/GI); Cranial techniques (influence dorsal vagal nucleus via craniosacral rhythm). KEY RULE: OA-AA = vagus target. S2-S4 = pelvic splanchnics target. These are the ONLY two PSNS targets in OMM — don't mix them up. LYMPHATIC TREATMENTS (brief cross-ref, see file 23_lymphatics.txt for full depth): Thoracic lymphatic pump — moves lymph from thoracic duct into venous circulation; CONTRAINDICATED in pneumonia with sepsis risk (could spread bacteria systemically). Pedal pump (Dalrymple) — lower extremity lymph drainage. Splenic pump — activates immune cells from spleen, useful in infection but ALSO contraindicated if bacteremia risk exists. QUIZ HIGHLIGHTS (5-vignette board walkthrough, ANS/Chapman focus) 1. 16F, sore throat + painful swallowing + nonproductive cough, erythematous/edematous pharynx + bilateral expiratory wheezes, OMT planned to influence the PARASYMPATHETIC input causing pharyngeal inflammation + bronchoconstriction → target = OA-AA (vagus play — bronchoconstriction/pharyngeal inflammation are PSNS-driven via vagal fibers exiting at the jugular foramen at OA-AA; NOT T2-T6 [that's the SNS handle for lungs, doesn't turn off PSNS signal], NOT S2-S4 [sacral PSNS district serves bladder/distal colon/pelvic organs only, no fibers to pharynx/bronchi] — body has two separate PSNS districts: cranial [vagus/OA-AA] for chest/throat, sacral [pelvic splanchnics/S2-S4] for pelvic organs). 2. 58M, hospitalized CAP, diffuse crackles, leukocytosis, on antibiotics/O2, OMT ordered to INCREASE sympathetic output to lungs for respiratory drive/bronchodilation → correct technique = Rib raising (increases SNS outflow; NOT suboccipital release [PSNS/vagal], NOT thoracic lymphatic pump [lymphatic not autonomic], NOT paraspinal inhibition or Still technique [both DECREASE SNS tone]). 171 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES 3. 11M, ED for asthma exacerbation, diffuse expiratory wheezing + accessory muscle use, bronchodilator given, OMT to minimize ongoing bronchoconstriction → nerve responsible = Vagus nerve (PSNS drives bronchoconstriction; NOT phrenic [diaphragm motor], NOT greater splanchnic [SNS, upper GI], NOT pelvic splanchnics [sacral PSNS, lower GU/GI only], NOT cervical sympathetic chain [SNS]). 4. 44F, fatigue+weight gain+constipation x4 months, tender firm pea-sized nodule at anterior 2nd ICS near sternum on the RIGHT → thyroid Chapman point correlates with hypothyroidism → elevated TSH (not Free T4 [would be LOW], not prolactin/glucose/cortisol — unrelated to this point/symptom complex). 5. 35F, hospitalized pneumonia (RLL consolidation), productive cough, bilateral wheezes, hot/clammy skin (signs of high SNS tone), OMT ordered to DECREASE sympathetic output to lungs → correct technique = Paraspinal inhibition T1-T4 (or Still technique — both decrease SNS tone; NOT rib raising [increases SNS], NOT suboccipital release [PSNS/vagal target, not the lung-specific SNS levels], NOT thoracic lymphatic pump [not an autonomic modulation technique]). MEMORY HOOKS - SItS = rotator cuff (Supraspinatus, Infraspinatus, teres minor, Subscapularis). - "An EXTended game of tennis will ruin the Lawn" (lateral epicondylitis); "A FLexible game of golf allows Mulligans" (medial epicondylitis). - Valgus/valgum = MORE letters = BIGGER angle = knees/bones knocked together (applies to carrying angle AND Q angle AND genu valgum/varum). - "Lachman" starts with A-C-L = ACL test. - Ulnar claw = test EXTENSION; Pope's hand (median) = test FLEXION — same deformity family, opposite test/nerve. - Reflex root ≠ dermatome root at the same level — biceps reflex is C5 even though C6 covers more of the forearm/thumb sensory territory. - "Greater→Lesser→Least splanchnic, numbers go up as you go down the gut" (T5-9→celiac, T10-11→SMG, T12-L2→IMG). - OA-AA = vagus (cranial PSNS); S2-S4 = pelvic splanchnics (sacral PSNS) — the ONLY two PSNS treatment targets in OMM. - Rib raising = ↑SNS; paraspinal inhibition/Still technique = ↓SNS — board questions hinge on whether the stem says "increase" or "decrease." - Sweat glands: sympathetic pathway, but cholinergic (muscarinic) neurotransmission — the classic ANS exception. - 2nd ICS near sternum Chapman point = thyroid (memorize this one cold — it's a recurring vignette anchor). 172 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Lower Extremity Nerve Injuries OMM · ANATOMY Lower Extremity Nerve Injuries: Sciatic, Peroneal, Femoral, Obturator, Tibial, Superior Gluteal "Six nerves. Six patterns of injury. Master the anatomy and you will never confuse foot drop with Trendelenburg again." THE LUMBOSACRAL PLEXUS (L2-S3) generates six nerves, each with a unique pinch point and injury signature: FEMORAL NERVE (L2-L4): Motor = quadriceps (knee extension), iliopsoas (hip flexion). Sensory = anterior thigh + medial leg (saphenous branch). Reflex = patellar (L4). Pinch point = iliopsoas compartment/retroperitoneal space. Classic injury = retroperitoneal hematoma (anticoagulated patients), psoas abscess, pelvic fracture. Mnemonic: "Lost patellar reflex + weak quads + medial leg numb = femoral nerve." OBTURATOR NERVE (L2-L4): Motor = adductors (longus, brevis, gracilis, magnus). Sensory = medial thigh. Reflex = none. Pinch point = obturator canal. Classic injury = pelvic operations, obturator hernia repair. Mnemonic: "Medial thigh weak AND numb with no reflex change = obturator nerve." SCIATIC NERVE (L4-S3): Motor = hamstrings + everything below the knee (splits into peroneal + tibial at the popliteal fossa). Sensory = posterior knee + entire foot except the medial strip. Reflex = none directly (it subserves the peroneal + tibial reflex arcs). Pinch point = piriformis/greater sciatic notch/posterior hip. Classic injury = posterior hip dislocation, large herniated disc, piriformis syndrome. Mnemonic: "Foot drop + lost plantarflexion + hamstring weakness = sciatic (proximal to the split)." KEY: a sciatic lesion ALWAYS includes BOTH tibial and peroneal territory (motor and sensory) since it's the trunk before division — this is the key differentiator from an isolated peroneal or tibial injury. COMMON PERONEAL NERVE (L4-S2): Motor = dorsiflexion (deep peroneal branch) + eversion (superficial peroneal branch). Sensory = dorsum of foot EXCEPT the 1st webspace (which is deep-peroneal-only territory). Reflex = none. Pinch point = fibular neck — superficial course, almost no soft tissue protection. Classic injury = fibular neck fracture, tight cast, prolonged squatting. Presentation: foot drop, foot INVERTED + PLANTARFLEXED at rest (unopposed tibial nerve action), steppage gait (compensatory hip/knee over-flexion to clear the dropped foot). MNEMONIC: PED = Peroneal Everts and Dorsiflexes — if injured, "foot dropPED." TIBIAL NERVE (L4-S3): Motor = plantarflexion, toe flexion, foot invertors, foot intrinsics. Sensory = sole of foot. Reflex = Achilles (S1-S2). Pinch point = popliteal fossa (Baker cyst, proximal) or tarsal tunnel/medial malleolus (distal). Classic injury = Baker cyst (proximal), tarsal tunnel syndrome (distal, classically from rheumatoid arthritis tenosynovial proliferation). Presentation: can't stand on tiptoes, sole numbness, positive Tinel sign at the medial 173 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES malleolus. MNEMONIC: TIP = Tibial Inverts and Plantarflexes — if injured, "can't stand on TIPtoes." SUPERIOR GLUTEAL NERVE (L4-S1): Motor = gluteus medius + gluteus minimus + tensor fasciae latae (hip abductors). Sensory = none. Reflex = none. Pinch point = superomedial gluteal region (exits above the piriformis). Classic injury = IM injection in the superomedial gluteal region (AVOID — use superolateral/anterolateral/ventrogluteal site instead), hip arthroplasty (retractor injury). Presentation: TRENDELENBURG GAIT — pelvis drops CONTRALATERAL to the injured nerve, but the LESION is IPSILATERAL to the weight-bearing/stance leg. Mechanism: the stance-side gluteus medius must contract to hold the pelvis level as the opposite foot lifts off; if it fails, gravity pulls the unsupported contralateral side down. BOARD TRAP: don't confuse "which side drops" with "which side is injured" — the drop is contralateral, the lesion is ipsilateral to the stance leg. LATERAL FEMORAL CUTANEOUS NERVE (L2-L3) [covered in the interactive drill, not the main 6-nerve table]: PURE SENSORY, no motor fibers at all. Territory = anterolateral thigh. Entrapment at the ASIS/inguinal ligament (where it passes under/through the ligament) → Meralgia paresthetica: burning anterolateral thigh dysesthesias, NO motor deficit, NO reflex changes. Causes: obesity, tight belts/tool belts, pregnancy, pelvic procedures — sustained pressure at a fixed anatomic passage point. Root Sensory territory Motor loss Reflex L2-L3 Anterior/medial thigh Hip flexion (partial) None L4 Medial leg, medial malleolus Dorsiflexion weakness Patellar L5 Lateral leg, dorsal foot, great toe Dorsiflexion, hip abduction None (or medial hamstring) S1 Lateral malleolus, lateral foot, sole Plantarflexion weakness Achilles S2-S4 Posterior thigh, perineum, perianal Sphincter Bulbocavernosus CLINICAL LOCATOR DRILLS (quick-fire pattern recognition) - Cannot dorsiflex, sole sensation normal → Common peroneal nerve (dorsiflexion = deep peroneal branch; normal sole = tibial territory intact; foot rests inverted/plantarflexed). - Cannot adduct hip, medial thigh numb, patellar reflex normal → Obturator nerve (adductors = obturator; normal patellar reflex excludes femoral; medial thigh = obturator sensory territory). 174 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES - Pelvis drops on the LEFT when standing on the RIGHT leg → Right superior gluteal nerve (lesion is on the WEIGHT-BEARING/stance side; right abductors fail to hold the pelvis level as left foot lifts). - Burning anterolateral thigh pain, no motor deficit, no reflex changes → Lateral femoral cutaneous nerve (pure sensory; meralgia paresthetica from ASIS/inguinal ligament entrapment). BOARD-TESTING PATTERN ("From the Attending" — how the exam builds distractors): the board's signature move is giving a mechanism, then dangling the WRONG territory as a tempting distractor: - Fibular neck fracture → tempts you toward L4-L5 disc herniation (both cause dorsiflexion failure). SEPARATOR: disc herniation gives back pain + positive SLR + MEDIAL foot numbness; peroneal nerve injury gives DORSAL foot numbness, no back pain, no reflex change at the knee. - Hip arthroplasty with Trendelenburg → tempts you toward femoral nerve (both involve the hip). SEPARATOR: femoral nerve injury drops the PATELLAR REFLEX and weakens the quad; superior gluteal injury leaves the quad STRONG — the pelvis just can't stay level. - Positive Tinel sign at the medial malleolus → tempts you toward S1 radiculopathy (sole is numb in both). SEPARATOR: S1 radiculopathy KILLS the Achilles reflex; tarsal tunnel syndrome leaves it INTACT. Also, a Tinel sign is never a feature of radiculopathy (it requires a discrete, tappable peripheral nerve compression point). Bottom line: "Know the separator. That is the only question they can ask." QUIZ / VIGNETTE HIGHLIGHTS (5 full board vignettes with complete answer-choice reasoning) 1. 38M construction worker, fall from scaffolding, PROXIMAL FIBULA fracture, can't dorsiflex or evert, decreased dorsal foot sensation, DTRs intact at knee/ankle → Common peroneal nerve injury. Mechanism: the nerve wraps the fibular neck with minimal soft-tissue protection, splitting there into deep (dorsiflexion + 1st webspace) and superficial (eversion + dorsal foot) branches — injury here knocks out both. Foot rests plantarflexed/inverted because antagonist tibial muscles are intact. Distractors: L4-L5 disc herniation would add back pain + positive SLR + MEDIAL foot/great toe sensory loss (not present); tibial nerve injury would affect plantarflexion/sole (opposite territory — "TIP" mnemonic); sciatic nerve injury would ALSO knock out plantarflexion (tibial division) since it's proximal to the split; superficial peroneal alone would spare dorsiflexion (that's the deep branch's job) — loss of BOTH eversion and dorsiflexion localizes to the common peroneal TRUNK before it divides. 175 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES 2. 47F, 2 months post right total hip arthroplasty, LEFT pelvis drops when standing on the RIGHT leg, hip extension 5/5 bilaterally, knee flexion/extension intact, sensation normal, MRI lumbar spine negative → Right superior gluteal nerve injury (retractor injury during arthroplasty; nerve exits above piriformis to gluteus medius/minimus/TFL). Trendelenburg mechanism: lesion is IPSILATERAL to the weight-bearing leg (right), pelvis DROP is CONTRALATERAL (left) — the weak muscle is on the stance side, the visible drop is on the opposite side. Distractors: femoral nerve injury would show absent patellar reflex + quad weakness (both normal here); obturator injury would show adduction weakness + medial thigh numbness (not the abductor pattern seen); inferior gluteal nerve injury impairs hip EXTENSION (glute max), not abduction — preserved extension + single-leg-stance-only failure points to superior gluteal; "left superior gluteal nerve" is wrong laterality — the lesion is ipsilateral to the STANCE leg (right), not the side that drops. 3. 36F obese, tight tool belt, 4-month burning/tingling ANTEROLATERAL right thigh, 5/5 strength throughout, patellar/Achilles reflexes intact, sensory loss restricted to anterolateral thigh, MRI lumbar spine negative → Meralgia paresthetica (lateral femoral cutaneous nerve entrapment at the inguinal ligament near the ASIS — pure sensory nerve, no motor component). Mechanism: nerve is tethered at a fixed anatomic passage (under/through the inguinal ligament) where a belt/waistband presses; tight socks wouldn't compress this because they're distal to the fixed point. Distractors: L2-L3 disc herniation excluded by MRI and would cause quad weakness + reduced patellar reflex; femoral nerve entrapment always includes motor weakness + reflex loss + saphenous (medial leg) sensory loss — none present; ilioinguinal nerve entrapment causes MEDIAL thigh/inguinal/genital numbness, different territory; obturator nerve causes adductor weakness + medial thigh numbness, different territory and different muscle group entirely. 4. 62M mechanical aortic valve on warfarin, acute severe right GROIN pain after vigorous coughing, 2/5 knee extension, absent right patellar reflex, decreased sensation anterior thigh + MEDIAL leg, hip extension/plantarflexion intact, INR 8.2, CT shows large right retroperitoneal/iliopsoas hematoma → Right femoral nerve injury (nerve runs within the iliopsoas fascial sheath; a compressive hematoma there directly compresses it before it exits under the inguinal ligament). Classic triad again: quad weakness + absent patellar reflex + anterior thigh/medial leg (saphenous) sensory loss. Anticoagulation + iliopsoas hematoma is a classic life-threatening complication. Distractors: obturator nerve is anatomically separate (obturator canal, not iliopsoas compartment) and would show adductor weakness/medial thigh numbness without patellar reflex loss; sciatic nerve exits posteriorly through the greater sciatic foramen — a retroperitoneal (anterior) hematoma doesn't reach it, and sciatic injury would show posterior thigh/hamstring weakness + foot drop + lost plantarflexion (absent here); lateral femoral cutaneous nerve is pure sensory and cannot explain the motor deficit/absent reflex; common peroneal nerve is at the fibular neck, far distal to the retroperitoneal space — can't be compressed by a pelvic hematoma. 176 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES 5. 44F rheumatoid arthritis, 5-week burning/numbness SOLE of right foot, worse with standing/better with rest, 5/5 dorsiflexion/plantarflexion/toe flexion, Achilles reflex INTACT, POSITIVE Tinel sign posterior to right medial malleolus, MRI shows tenosynovial proliferative tissue compressing the tarsal tunnel, NCS shows slowed tibial conduction at the ankle → Tarsal tunnel syndrome (RA-driven tenosynovial proliferation compresses the tibial nerve within the fixed fibro-osseous tarsal tunnel; positive Tinel posterior to the medial malleolus is pathognomonic). KEY LOGIC: intact Achilles reflex places the lesion DISTAL to the reflex arc's entry point (at the ankle, not more proximal) — an absent Achilles reflex would instead suggest a more proximal lesion (Baker cyst at the popliteal fossa) or an S1 root lesion. Distractors: plantar fasciitis is a musculoskeletal syndrome with morning startup heel pain and a positive Windlass test — never burning dysesthesias, Tinel sign, or abnormal NCS; common peroneal injury causes DORSAL foot numbness + foot drop, opposite territory (dorsiflexion here is normal); S1 radiculopathy ALWAYS includes an absent/reduced Achilles reflex (present here as intact) plus typically low back pain/sciatic stretch signs; diabetic peripheral neuropathy is bilateral/symmetric/stocking-glove and metabolic, not unilateral/focal/mechanical (and this patient has RA, not diabetes). MEMORY HOOKS - PED = Peroneal Everts and Dorsiflexes (injured → foot dropPED). - TIP = Tibial Inverts and Plantarflexes (injured → can't stand on TIPtoes). - Trendelenburg = lesion IPSILATERAL to the stance/weight-bearing leg; pelvis DROP is CONTRALATERAL — don't confuse which side is injured with which side visibly drops. - Sciatic nerve injury = BOTH tibial AND peroneal deficits together (it's the trunk before the split) — an isolated deficit in only one territory points to a branch injury, not the sciatic trunk itself. - Femoral nerve triad: absent patellar reflex + quad weakness + anterior thigh/medial leg (saphenous) sensory loss — classic in anticoagulated patients with iliopsoas/retroperitoneal hematoma. - Lateral femoral cutaneous nerve = PURE SENSORY (meralgia paresthetica) — no motor findings ever; entrapped at the ASIS/inguinal ligament. - Achilles reflex intact = lesion is distal to the ankle-level reflex arc entry (tarsal tunnel); Achilles reflex absent = lesion is more proximal (Baker cyst) or an S1 root problem. - The board's move: give a mechanism, then dangle the anatomically-adjacent wrong nerve/root as a distractor — always find the ONE separating finding (reflex status, exact sensory territory, or associated systemic sign). 177 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES Brachial Plexus & Upper Extremity Nerve Injuries OMM · ANATOMY Brachial Plexus and Upper Extremity Nerve Injuries — Erb's, Klumpke's, the three peripheral palsies, TOS, carpal tunnel, radial head OMM BRACHIAL PLEXUS ROAD MAP: Roots (C5-T1) → Trunks → Divisions → Cords → Branches. Mnemonic: "Randy Travis Drinks Cold Beer." Cords named for position relative to the AXILLARY ARTERY: Lateral, Posterior, Medial. Median nerve = Lateral + Medial cords ("bridge" nerve — that's why it's called "median"). AXILLARY NERVE (C5-C6): exits axilla through the QUADRILATERAL SPACE with the posterior humeral circumflex artery. At risk in anterior shoulder dislocation or surgical neck of humerus fracture. Loss: deltoid paralysis (cannot abduct past 15°) + lateral shoulder numbness ("regimental badge" area). Test: resisted abduction at 90°. ERB-DUCHENNE PALSY (C5-C6, UPPER TRUNK): Mechanism = lateral traction of head AWAY from shoulder (birth: shoulder dystocia; adult: motorcycle fall/lateral neck flexion away from shoulder) stretches C5-C6 roots. Losses: deltoid (abduction), biceps/brachialis (flexion), brachioradialis, supraspinatus + infraspinatus (external rotation). Posture: "WAITER'S TIP" — arm adducted, internally rotated, elbow extended, forearm pronated. Reflex lost: biceps (C5-C6) and brachioradialis. WHY THAT POSTURE (mechanistic explanation): muscles that abduct/externally rotate are gone (deltoid, supraspinatus, infraspinatus); opposing muscles — pectoralis major (adduction) and subscapularis (internal rotation) — work UNOPPOSED. Gravity wins at the elbow (biceps out). Pronation defaults because supinator (C6) is also damaged. BOARD RULE: "the posture tells you WHICH muscles are absent." KLUMPKE'S PALSY (C8-T1, LOWER TRUNK): Mechanism = HYPERABDUCTION of the arm (grabbing overhead during a fall, or breech delivery with arm raised above head) stretches C8-T1 roots. Losses: ALL intrinsic hand muscles (all lumbricals, all interossei, thenar, hypothenar) via both median AND ulnar C8-T1 contributions. Posture: all four fingers CLAWED (MCP hyperextension + IP flexion), wrist flexed. BONUS FINDING: if T1 avulsed hard enough, drags the cervical sympathetic chain → HORNER SYNDROME (ptosis, miosis, anhidrosis, all ipsilateral). Horner + Klumpke's ALWAYS pair together in a brachial plexus context — T1 avulsion severs preganglionic oculosympathetic fibers en route to the stellate ganglion/internal carotid plexus/eye (ciliospinal center of Budge at C8-T1-T2). ERB'S vs KLUMPKE'S DISCRIMINATOR: Erb's = proximal arm lost, HAND INTACT (grip works). Klumpke's = distal hand lost, proximal arm intact (shoulder/elbow move fine, hand useless/clawed). The question will always specify whether grip/intrinsics are preserved or absent — THAT is the discriminating clue. Horner syndrome in a brachial plexus context = always Klumpke's. 178 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES THORACIC OUTLET SYNDROME (TOS) — THREE COMPRESSION ZONES (brachial plexus + subclavian vessels must pass through): 1. Scalene triangle (between anterior and middle scalenes) — Adson test: deep breath + head turned TOWARD affected side compresses. 2. Costoclavicular space (between 1st rib and clavicle) — Military brace test: shoulders pulled back and down. 3. Pec minor tunnel (under pec minor + coracoid) — Wright's/hyperabduction test. NEUROGENIC vs VASCULAR TOS: Neurogenic (95% of cases) — C8-T1 MOST affected (lower plexus runs closest to first rib); hand intrinsic weakness, medial forearm/hand numbness (ulnar distribution). Vascular TOS — arm pallor, pulselessness, color change with position (subclavian artery or vein involved). BOARD TRAP: TOS mimics ULNAR nerve injury (both affect medial hand/ring-pinky). Discriminator: TOS is POSITIONAL (provoked by arm elevation); ulnar nerve injury is NOT positional. A positive Adson or Wright test = TOS. THE THREE PERIPHERAL NERVE PALSIES (full comparison table — Nerve | Common injury site | Motor loss | Sensory loss | Posture): - Ulnar (C8-T1): Medial epicondyle groove OR Guyon's canal (wrist) | Lumbricals 3-4, all interossei, hypothenar, adductor pollicis | Medial hand, ring (medial half), pinky | Ring+pinky claw; Froment's sign. - Median (C5-T1): Carpal tunnel; pronator teres; supracondylar fracture history | Lumbricals 1-2, thenar (APB, FPB, OP) | Lateral 3.5 fingers (thumb, index, middle, radial half ring) | Acute: Pope's hand; Chronic: ape hand (thenar wasting). - Radial (C5-T1): Spiral groove (midshaft humerus fracture); axilla (crutch injury) | Wrist extensors (ECRL, ECRB, ECU), finger extensors (EDC) | Dorsal hand 1st web space | Wrist drop. - Axillary (C5-C6): Surgical neck fracture; anterior shoulder dislocation | Deltoid (no abduction past 15°) | Lateral shoulder "regimental badge" | Flattened deltoid contour. ULNAR NERVE DETAIL: Froment's sign — patient flexes thumb IP joint (using FPL via median) when trying to pinch paper because adductor pollicis (ulnar) is out. ULNAR PARADOX (board rule): a WRIST-LEVEL injury produces a WORSE claw than an ELBOW-LEVEL injury, because FDP to ring/pinky is still intact at the wrist (driving strong IP flexion), whereas an elbow-level injury also knocks out FDP to ring/pinky (via the same ulnar trunk before it branches to the hand), reducing IP flexion and making the claw LESS dramatic. CLAW FORMULA: EDC unopposed at MCP (hyperextension) + intact FDP driving IP flexion = dramatic claw; remove FDP (higher/elbow lesion) and the claw becomes less pronounced. MEDIAN NERVE DETAIL: Anterior interosseous nerve (AIN) = pure MOTOR branch of median; innervates FPL + FDP to index finger, enabling the "OK sign" pinch. AIN injury = loss of 179 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES terminal thumb IP flexion + index DIP flexion (can't form a precise OK circle) — a FLEXION problem, no sensory loss (contrast with PIN, radial's motor branch, which is an EXTENSION problem, also no sensory loss). DERMATOME QUICK RULE (C5-T1): lateral to medial = C5 to T1. C5 = lateral arm (deltoid patch). C6 = thumb + index. C7 = middle finger. C8 = ring + pinky. T1 = medial arm. Dermatome pattern mirrors root innervation pattern. SHOULDER EXAM - Rotator cuff (SItS): Supraspinatus (abduction first 15°, most common tear site, subacromial impingement), Infraspinatus + teres minor (external rotation), Subscapularis (internal rotation — uniquely attaches to LESSER tuberosity; all others attach to greater tuberosity). Tests: empty can/Jobe's = supraspinatus; painful arc 60-120° = supraspinatus; drop arm = full-thickness tear. - Impingement: Neer (forward flex past 90°) + Hawkins-Kennedy (internally rotate flexed arm) — both compress supraspinatus under acromion. - Instability: Apprehension test (ABER position) + Relocation test (posterior humeral head pressure relieves apprehension). - Biceps: Speed's (resist shoulder flexion, forearm supinated) + Yergason's (resist supination at 90° elbow flexion). - Sulcus sign: downward arm traction creates a sulcus below the acromion = inferior laxity. - Posterior shoulder dislocation: caused by SEIZURES or electrocution (massive simultaneous posterior muscle contraction levers the humeral head backward). X-ray = "light bulb sign" (internally rotated humerus, often missed on first read). Board reflex: "seizure + arm held adducted/internally rotated" = posterior dislocation until proven otherwise. CARPAL TUNNEL SYNDROME: nine tendons + one nerve (median) pass under the flexor retinaculum; any volume increase compresses the median nerve. Classic: nocturnal paresthesias in lateral 3.5 fingers, relieved by shaking the hand (flick sign). Risk factors: pregnancy, hypothyroidism, RA, acromegaly, diabetes, repetitive wrist use — ALL increase tunnel CONTENTS/volume in a fixed rigid compartment (bones on 3 sides, flexor retinaculum on the 4th). Late sign: thenar wasting (APB weakness) = chronic compression. PROVOCATIVE TESTS: Phalen's test (full wrist flexion x60 sec reproduces paresthesias — MOST SENSITIVE). Tinel's sign (tap over volar wrist/tunnel — electric tingling in median distribution — PERCUSSION, not flexion). Carpal compression test (direct pressure on tunnel x30 sec — high specificity). NCS/EMG (prolonged median distal latency confirms — gold standard before surgery). BOARD DISCRIMINATOR: "sustained wrist flexion reproduces symptoms" = Phalen's (by definition); "tapping/percussion over the tunnel" = Tinel's — don't confuse the two mechanisms. 180 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES HAND DEFORMITY TABLE (Condition | DIP | PIP | Cause | Board pearl) - Swan Neck: Flexed DIP | Hyperextended PIP | RA/intrinsic tightness | S-shaped finger; PIP hyperextension is the key finding. - Boutonniere: Hyperextended DIP | Flexed PIP | Central slip rupture (RA or trauma) | "Button-hole" — PIP pops through like a button; PIP FLEXION distinguishes from Swan. - Dupuytren's: Variable DIP | Flexed PIP | Palmar fascia fibrosis, ring+pinky first | Painless contracture; associated with alcoholic cirrhosis, DM, phenytoin. - De Quervain's: Normal DIP/PIP | 1st extensor compartment (APL+EPB) | New mothers; Finkelstein test (thumb tucked, ulnar deviate) → radial wrist pain. OMM — RADIAL HEAD DYSFUNCTION NAMING: radial head moves ANTERIORLY in supination, POSTERIORLY in pronation. Named for the position it is STUCK IN. - Anterior radial head: stuck in supination (anterior position); CANNOT fully pronate. Fix: push radial head POSTERIORLY while guiding the forearm INTO PRONATION. - Posterior radial head: stuck in pronation (posterior position); CANNOT fully supinate. Fix: push radial head ANTERIORLY while guiding the forearm INTO SUPINATION. Board clue: FOOSH injury + limited pronation = anterior radial head; limited supination = posterior radial head. OMM naming principle (verbatim logic): "named position = where it is stuck = the motion that is free. What is restricted is the opposite. Treatment: take the restriction to its barrier" — push OPPOSITE the displaced direction while moving the forearm INTO the restricted motion. OMM — ULNAR DYSFUNCTION (distal radioulnar joint): named for the ulna's DISPLACED position (opposite the motion restriction). Abducted ulna = ulna lateral, ADDuction restricted, radial deviation of wrist limited. Adducted ulna = ulna medial, ABduction restricted, ulnar deviation of wrist limited. [Cross-reference file 24_ue-le-notes.txt for the parallel olecranon/carrying-angle framing of this same ulnar dysfunction pattern.] QUIZ / VIGNETTE HIGHLIGHTS (7 original 3rd-order board vignettes) 1. 3-day-old male, prolonged vaginal delivery + shoulder dystocia, right arm adducted/internally rotated/pronated, absent biceps reflex, INTACT grasp reflex, no fracture, absent Moro on right → C5-C6 upper trunk (Erb-Duchenne). "Waiter's tip" + absent biceps reflex + intact grip = textbook. NOT C7 (would cause triceps weakness/wrist drop pattern, no waiter's tip), NOT C8-T1/Klumpke's (would abolish grip and cause clawing — grip is intact here), NOT pan-plexus (would eliminate BOTH proximal and distal function — hand works fine). KEY RULE STATED: "whenever a reflex is absent you can read the root level directly" — absent biceps = C5/C6; absent triceps = C7. 181 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES 2. 22M, fell asleep with arm draped over a chair for hours ("Saturday night palsy"), can't extend wrist, can't extend fingers, sensory loss over dorsal 1st web space, elbow extension FULLY PRESERVED, absent brachioradialis reflex, no fracture → Radial nerve at the SPIRAL GROOVE. Localization logic: triceps branch arises PROXIMAL to the spiral groove (spared), brachioradialis branch is at/just distal to the groove (reflex lost), wrist/finger extensors are hit. NOT axillary (no forearm/hand targets at all — only deltoid+badge numbness), NOT PIN (PIN spares wrist extension since ECRL branches before PIN, and PIN has NO sensory component — this patient has BOTH wrist drop AND sensory loss, requiring a more proximal lesion), NOT ulnar (that's ring/pinky claw territory, not wrist extension). 3. 34M construction worker, struck MEDIAL elbow against scaffolding 1 week ago, can't abduct little finger or cross fingers, EMG shows denervation of FDP to ring/little fingers, ring+pinky claw with MCP hyperextension+IP flexion; COMPARED to an equivalent wrist-level ulnar injury → this ELBOW-level injury produces a LESS SEVERE claw (the "ulnar paradox") because FDP to ring/pinky is ALSO lost at this level, reducing the IP-flexion component of the claw (claw needs EDC-unopposed MCP hyperextension AND intact FDP-driven IP flexion for full drama — remove FDP and the finger collapses limply instead of clawing dramatically). NOT "more severe" (bigger injury ≠ more dramatic claw — intuitive but wrong), NOT "identical" (same intrinsic loss, but different FDP status changes the clinical picture), NOT "median compensates" (median only innervates lumbricals 1-2 [index/middle], never compensates for ulnar's lumbricals 3-4 [ring/pinky] — no cross-territory compensation exists in peripheral nerve anatomy). 4. 38F, 28 weeks pregnant, 3-week right hand numbness worse at night, relieved by shaking (flick sign), sensory loss palmar thumb/index/middle/radial-ring, thenar bulk symmetric, NCS shows prolonged median distal motor latency (5.8ms, normal <4.5ms), bedside test reproduces tingling after 45 SECONDS of MAINTAINED WRIST FLEXION → Phalen's test (the exact mechanism: sustained flexion raises tunnel pressure; most sensitive CTS test). NOT Tinel's (percussion, not sustained flexion), NOT Finkelstein's (tests 1st extensor compartment for De Quervain's — radial wrist pain, not finger paresthesias), NOT Froment's (tests ulnar/adductor pollicis — wrong nerve, wrong territory). Mechanism note: pregnancy → fluid retention (aldosterone/estrogen effects) → raises pressure in the fixed rigid carpal tunnel — same volume-increase mechanism as hypothyroidism, acromegaly, and RA. 5. Newborn female, breech delivery, arm HYPERABDUCTED during delivery of the aftercoming head, right hand claw posture (MCP hyperextension + IP flexion, ALL four fingers), absent grasp reflex, right-sided ptosis+miosis+anhidrosis, Moro intact on LEFT, no fracture → C8-T1 lower trunk WITH T1 sympathetic chain involvement (Klumpke's + Horner syndrome — the classic pairing). Hyperabduction stretches the lower trunk; T1 avulsion drags the adjacent cervical sympathetic chain, interrupting the ipsilateral oculosympathetic pathway (preganglionic fibers exit at C8-T1-T2 [ciliospinal center of Budge], travel the T1 root, ascend through the stellate ganglion, follow the internal carotid to the eye). NOT C5-C6/Erb's (hand would be NORMAL — the discriminating clue is hand function status: intact hand + limp proximal arm = Erb's; absent hand function + clawing = Klumpke's), NOT pan-plexus (shoulder MOVES normally here — Moro intact on the unaffected side and preserved proximal arm motion rules out total avulsion), NOT C7-C8 combined (C7 would add triceps weakness/wrist drop, not mentioned/present). 182 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES 6. 46M cyclist, 2-week forearm ache + progressive hand weakness after a long ride, CANNOT extend index finger at MCP, ring/pinky extension also weak, WRIST EXTENSION PRESERVED (extends to neutral against resistance), sensation COMPLETELY NORMAL over hand/dorsal forearm, MRI shows edema near proximal radius, no fracture → Posterior interosseous nerve (PIN) injury (motor branch of radial, arises at elbow, enters radial tunnel; entrapped at the arcade of Frohse from repetitive pronation/supination). Classic PIN pattern: finger+thumb extension loss + INTACT wrist extension (ECRL branches off BEFORE PIN) + NO sensory loss (PIN is purely motor). NOT spiral groove radial injury (would cause wrist drop AND sensory loss — both absent here, since spiral groove is proximal to the ECRL branch point), NOT AIN (that's a MEDIAN motor branch causing a FLEXION problem — OK-sign pinch loss, not extension loss — opposite side of the limb from PIN), NOT Guyon's canal ulnar (ulnar motor territory at the wrist = intrinsic hand muscles, never finger extensors — extension is exclusively radial territory). KEY LOCALIZER: ECRL status — ECRL intact (wrist extends) + finger extension lost = injury is DISTAL to the ECRL branch point = PIN level. 7. 31F physical therapist, elbow stiffness after FOOSH 3 days ago, radial head palpated ANTERIORLY displaced (lateral to biceps tendon insertion), pronation LIMITED to 60° (normal 80-90°), supination FULL and painless, no fracture/dislocation on X-ray → Anterior radial head dysfunction — treatment = apply POSTERIOR force to the radial head WHILE guiding the forearm INTO PRONATION (choice B). Logic: head is stuck anteriorly (supinated position), motion restriction is pronation (can't move posteriorly); push it posterior (opposite its displaced direction) while taking the forearm into the restricted motion (pronation) to seat the head correctly. NOT choice A (anterior force + supination — that's the treatment for the OPPOSITE dysfunction, a POSTERIOR radial head; applying it here would push the already-anterior head further forward), NOT choice C (lateral force — radial head OMM uses anterior-posterior vectors tied to pronation-supination mechanics, not lateral displacement), NOT choice D (long-axis traction — this is a POSITIONAL fault, not a distraction/compression problem; positional faults need positional corrections). MEMORY HOOKS - "Randy Travis Drinks Cold Beer" = Roots, Trunks, Divisions, Cords, Branches. - Erb's = proximal arm dead, hand intact (grip works) — "waiter's tip." Klumpke's = hand dead (claw), proximal arm intact — pair with Horner syndrome via T1 sympathetic chain involvement. - Absent reflex = direct window into root level: biceps (C5-C6), brachioradialis (C6), triceps (C7). - Ulnar paradox: HIGHER (elbow) ulnar injury = LESS dramatic claw (FDP also lost, IP flexion weakens); LOWER (wrist) injury = WORSE claw (FDP intact, drives strong IP flexion). - ECRL branch-point trick: proximal to ECRL (spiral groove/axilla) = wrist drop; distal to ECRL (PIN/radial tunnel) = wrist extension SPARED, only finger/thumb extension lost, no sensory loss. - AIN (median motor branch) = flexion problem (OK-sign loss); PIN (radial motor branch) = extension problem — both are pure motor, opposite sides of the limb, easy to conflate. 183 OMM / OMT BOARD REVIEW PART 7 — EXTREMITIES & PERIPHERAL NERVES - Phalen's = sustained wrist FLEXION; Tinel's = PERCUSSION/tapping — different mechanisms, don't mix up. - Radial head OMM: named for where it's STUCK; treat by pushing OPPOSITE that position while moving the forearm INTO the restricted motion (anterior head → push posterior + pronate; posterior head → push anterior + supinate). - TOS mimics ulnar nerve injury but is POSITIONAL (provoked by arm elevation) — ulnar injury is not positional. 184 PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN PART 8 INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN IN THIS PART Osteopathic Special Tests (Provocative Exam Maneuvers) Low Back Pain: Red Flags & OMT Approach 185 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Osteopathic Special Tests (Provocative Exam Maneuvers) OSTEOPATHIC SPECIAL TESTS: PROVOCATIVE EXAM MANEUVERS — CONDENSED STUDY NOTES OVERVIEW: This page catalogs the hands-on provocative/special tests a board exam expects you to recognize by MANEUVER DESCRIPTION and match to (1) the structure being stressed, (2) the positive finding, and (3) the diagnosis. The organizing idea: each test asks the patient's body a specific mechanical question. Learn the QUESTION (the maneuver + what it isolates), not just the test's name. Regions covered: Cervical spine (radiculopathy + vertebral artery safety screening), Thoracic Outlet Syndrome (3 compression sites), Low Back/Lumbar, Sacrum/Pelvis, Knee, Wrist/Hand, and Shoulder. 26 full clinical vignettes + 2 "elimination game" exercises accompany the core test list. Cervical: Spurling Test, Wallenberg Test (vertebral artery screen), Cervical Distraction Test TOS/Upper Extremity: Adson Test, Wright Test (Hyperabduction), Military Posture Test (Costoclavicular Test), Roos Test (EAST) [mentioned], Allen Test [mentioned, distractor] Low Back: Crossed Straight Leg Raise, Psoas Tension Test Sacrum/Pelvis: Hip Drop Test, Pelvic Side Shift Test, Lumbosacral Spring Test, Sphinx Test (Backward Bending), Ober's Test, Thomas Test, Patrick Test (FABERE) Knee: Apley Compression Test, Apley Distraction Test, Lachman Test, McMurray Test, Anterior Drawer Test, Posterior Drawer Test Wrist/Hand: Finkelstein Test, Tinel Sign, Phalen Test (+ Reverse Phalen) Shoulder: Apley Scratch Test, Drop Arm Test (Codman Test), Speed Test, Yergason Test, plus differential-only tests mentioned in vignettes: Neer impingement test, Hawkins test, empty can test, O'Brien active compression test, apprehension/relocation test, lift-off/belly-press test, cross-body adduction test, Watson (scaphoid) shift test, Sharp-Purser test ========================================================= ======= SECTION 1: CERVICAL SPINE ========================================================= ======= SPURLING TEST Tests for: Cervical radiculopathy (nerve root compression from disc herniation or foraminal stenosis). How to perform: Extend the neck, SIDEBEND TOWARD the symptomatic side, then apply axial compression (push down on the head). Three moves in sequence: extend, sidebend, compress. Positive finding: Reproduces radicular pain/numbness/tingling down the arm in the affected dermatome. 186 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Mechanism: All three moves narrow (close) the neural foramen on the tested side — if a nerve root is already compressed, closing the foramen further reproduces the radicular pain. The dermatome pattern reproduced tells you the level. BOARD TRAP: Spurling sidebends TOWARD the affected/symptomatic side (closing that foramen) — a question may try to trick you into thinking it's "away from" the symptomatic side. Away-from-side sidebending is what OPENS the foramen (see Cervical Distraction below). CERVICAL DISTRACTION TEST (complementary to Spurling) Tests for: Confirms foraminal nerve root compression by doing the OPPOSITE maneuver. How to perform: Grasp the head and apply gentle upward axial traction/distraction. Positive finding: Immediate relief of radiating arm pain. Mechanism: Distraction OPENS the intervertebral foramen (opposite of Spurling, which closes it). Spurling reproduces pain by narrowing the space; distraction relieves pain by widening it. Using both together confirms the nerve root is being compressed within the foramen (not a facet, meniscoid, or vascular problem). WALLENBERG TEST (pre-manipulation vertebral artery / vertebrobasilar insufficiency screen) Tests for: Vertebral artery insufficiency — a SAFETY screen, not a diagnostic test for a specific pathology. How to perform: Extend and rotate the cervical spine. Hold the position (classically ~30 seconds). Positive finding: Dizziness, nystagmus, visual changes, or any of the "5 D's and 3 N's" (see below). Mechanism: Extension + rotation kinks/narrows the vertebral artery as it runs through the transverse foramina of C1-C6, reducing posterior circulation to the brainstem/cerebellum in a patient with a compromised or atherosclerotic artery. CRITICAL RULE: Wallenberg testing MUST be performed BEFORE cervical HVLA. A positive result is an ABSOLUTE, non-negotiable contraindication to cervical thrust technique — there is no "modified" HVLA that makes it safe. Do NOT: proceed with a modified technique, apply cervical traction (wrong indication — that's for radiculopathy, not vascular compromise), order imaging before deciding (the positive clinical screen alone is sufficient to cancel), or repeat the test to "confirm" (unnecessary added risk of provoking dissection). Correct action = cancel HVLA, use a lower-risk technique instead (muscle energy, counterstrain, myofascial release). THE 5 D's AND 3 N's (absolute contraindication checklist for cervical HVLA): 5 D's: Dizziness, Drop attacks, Diplopia, Dysarthria, Dysphagia 3 N's: Nausea, Nystagmus, Numbness (of the face) 187 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Rule: ANY ONE positive finding = no cervical HVLA. No exceptions. Each maps to a specific brainstem/cerebellar structure fed by the vertebral-basilar system (vestibular nuclei = nausea/dizziness; vestibulo-ocular pathways/cerebellum = nystagmus; descending trigeminal tract = facial numbness). Board trap: distractor answer lists that "sound" plausible but are unrelated to brainstem ischemia include nightsweats/nosebleeds/neck crepitus, neuralgia/neurosis/neck tenderness, and neck pain/stiffness/spasm (these last three are actually the INDICATIONS that bring someone in for manipulation — not contraindications to it). Also narrow pulse pressure/nasal congestion/night blindness are unrelated cardiac/ENT/ophthalmologic findings, not vertebrobasilar signs. BOARD TRAP — Atlantoaxial Instability vs Vertebral Artery Insufficiency: these are TWO DIFFERENT pre-HVLA contraindications screened by TWO DIFFERENT tests. Vertebral artery insufficiency = sustained extension + rotation, watching for the 5 D's/3 N's (Wallenberg-type screen). Atlantoaxial instability (seen in rheumatoid arthritis, Down syndrome, odontoid/dens fracture) = screened with the SHARP-PURSER TEST, which evaluates transverse ligament/dens integrity, not blood flow. Don't confuse the two screens or their target conditions. WALLENBERG SYNDROME (lateral medullary syndrome) — the feared outcome of an undetected positive screen: - Mechanism: vertebral artery dissection/occlusion during cervical HVLA (the vertebral artery itself is the vessel injured during manipulation — NOT a downstream branch like PICA, even though PICA territory is what typically infarcts). - Classic findings: CROSSED sensory pattern — ipsilateral facial pain/temperature loss (descending trigeminal tract) + contralateral body pain/temperature loss (spinothalamic tract) — plus vertigo, dysphagia, hoarseness (nucleus ambiguus), ataxia, nystagmus. - Distinguish from other posterior/vascular strokes (frequent distractor set): Anterior spinal artery syndrome: BILATERAL, SYMMETRIC motor loss + bilateral pain/temperature loss below a spinal level, with SPARED proprioception/vibration (dorsal columns intact). Symmetric bilateral pattern, not crossed. - Basilar artery occlusion: "nuclear option" — shuts down the whole brainstem → LOCKED-IN SYNDROME (quadriplegia/paralysis with preserved consciousness and only vertical eye movements). Bilateral, not lateralized. - Internal carotid artery dissection: ANTERIOR circulation stroke — contralateral face + arm weakness, aphasia if dominant hemisphere. Runs anterior to the transverse processes, enters via the carotid canal (not affected by cervical extension/rotation the way the vertebral artery is). - External carotid artery: supplies face/scalp/meninges — not compressed by cervical positioning, would not cause brainstem/cerebellar symptoms. - Thyrocervical trunk / subclavian artery: subclavian is the TOS-relevant vessel (tested by Adson/Wright/Military posture), not compressed by cervical extension-rotation. 188 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN CERVICAL DERMATOME / MYOTOME / REFLEX MAP (compiled from vignette teaching points — memorize the whole column together): Root Sensory/Dermatome Key Motor/Muscle Reflex C4 "Cape" over top of shoulder only — no arm involvement none specific to arm none C5 Lateral arm/shoulder ("regimental badge" area) Deltoid (abduction) Biceps (shared with C6) C6 Thumb, lateral forearm Wrist extensors Biceps, Brachioradialis C7 Middle finger, posterior forearm Triceps, wrist flexors Triceps C8 Ring + little finger (digits 4-5), medial forearm Finger flexors, grip strength Finger flexor reflex T1 Medial forearm/hand intrinsics Finger abduction/adduction (intrinsics) none specific BOARD TRAP (C5 vs C6): C6 also contributes to the biceps reflex, so a stem with an intact/involved biceps reflex can tempt you toward C6 — but if the KEY finding is DELTOID weakness + LATERAL ARM (not forearm) pain, that's C5, because deltoid is not part of C6's territory (C6 = wrist extensors + thumb/lateral forearm). If EMG shows denervation in muscles from TWO DIFFERENT peripheral nerves (e.g., deltoid = axillary nerve, biceps = musculocutaneous nerve) but they share a root, the lesion is at the ROOT level, not a peripheral nerve — confirmed by a positive Spurling. ========================================================= ======= SECTION 2: THORACIC OUTLET SYNDROME (TOS) — THREE COMPRESSION SITES, THREE TESTS ========================================================= ======= General teaching: TOS has three sequential anatomic "choke points" along the neurovascular bundle's path from neck to axilla. Each has its own dedicated provocative test. Know which test interrogates which site — the maneuver tells you the site. 189 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Compression Site Test Maneuver Structure Compressing Interscalene (scalene) triangle Adson Test Head rotated TOWARD affected side + extend neck + deep breath in; palpate radial pulse Anterior scalene against subclavian artery/brachial plexus Costoclavicular space Military Posture Test (Costoclavicular Test) Stand at attention: shoulders DOWN and BACK (depress + extend/retract); palpate radial pulse Clavicle pinching against first rib Subcoracoid space (under pectoralis minor) Wright Test (Hyperabduction Test) Hyperabduct the arm overhead past 90° (up to 180°); palpate radial pulse Pectoralis minor tendon over the coracoid, stretching/compressing the bundle ADSON TEST Tests for: TOS via anterior scalene compression of the subclavian artery/brachial plexus. How to perform: Turn head TOWARD the affected side, extend the neck, take a deep breath in. Palpate the radial pulse throughout. Positive finding: Diminished or absent radial pulse on the affected side (with symptom reproduction — see board trap below). Mnemonic: "Adson = Add-toward." Head turns TOWARD the affected side. WRIGHT TEST (Hyperabduction Test) Tests for: TOS via pectoralis minor (subcoracoid) compression. How to perform: Hyperabduct the arm overhead (full abduction past 90°, up to 180°). Palpate the radial pulse. Positive finding: Diminished/absent radial pulse, ± symptom reproduction. Mnemonic: "Wright = Right up." Arm goes straight up; pec minor catches the bundle like a clothesline. MILITARY POSTURE TEST (Costoclavicular Test) Tests for: TOS via costoclavicular space compression. How to perform: Patient stands at attention — draw the shoulders DOWN and BACKWARD while depressing/extending the shoulder. Palpate the radial pulse throughout. Positive finding: Diminished/absent radial pulse on the affected side. Mnemonic: "Military = attention!" Chest out, shoulders down and back — the collarbone clamps onto the first rib in the costoclavicular vise. 190 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN ROOS TEST (Elevated Arm Stress Test, EAST) — mentioned as a distractor/additional provocative TOS test: Maneuver: Abduct both shoulders to 90°, flex elbows to 90°, then open and close the fists repeatedly for up to 3 minutes. Positive finding: Reproduction of heaviness, fatigue, numbness, or the patient cannot complete 3 minutes. A distinct maneuver from Adson/Wright (functional/provocative endurance test rather than a single static position + pulse check). ALLEN TEST — mentioned as a distractor, NOT a TOS test: Assesses patency/collateral flow of the radial and ulnar arteries (fist made to exsanguinate the hand, one artery released to check refill). Useful before radial arterial line placement; not part of the TOS exam. BOARD TRAP — Pulse Change Alone Is NOT a True Positive: Up to ~50% of asymptomatic, normal people lose their radial pulse with Adson (or Wright) positioning — this is a normal variant, not TOS. A test is only clinically positive when the maneuver ALSO reproduces the patient's actual presenting symptoms. Pulse diminution without symptom reproduction = clinically insignificant / not a true positive. Do not call bilateral pulse changes "bilateral TOS requiring treatment" if only one side reproduces the chief complaint — that side is the true positive, the other is a benign normal variant. BOARD TRAP — TOS vs Subclavian Steal Syndrome: A positive Adson with pulse changes is NOT how you diagnose subclavian steal syndrome. Subclavian steal is a completely different mechanism — proximal subclavian artery stenosis causes the ipsilateral vertebral artery to reverse (retrograde) flow to feed the arm, "stealing" blood from the posterior circulation. It presents with vertebrobasilar symptoms (dizziness, visual changes) provoked by ARM EXERCISE, not by Adson-type positioning, and is confirmed by retrograde flow on Doppler — not by the TOS pulse test. CERVICAL RIB (bony TOS cause): A rudimentary cervical rib (extra rib arising from C7) narrows the scalene triangle and preferentially affects the LOWER TRUNK (C8-T1) of the brachial plexus because of its position relative to the rib — producing MEDIAL hand/digit symptoms (ring/pinky, grip weakness), reproduced by a positive Adson test. Seen on cervical spine radiograph. TOS SUBTYPES - Neurogenic TOS (~95% of cases, most common): brachial plexus compression → numbness/tingling/heaviness, usually in a lower-trunk (medial hand) distribution. - Arterial (vascular) TOS (rare but dangerous): subclavian artery compression → pallor, coolness, diminished pulse, positional ischemia (e.g., hand turns visibly pale with overhead arm use). Needs imaging and possibly surgery — do not mistake for a neural problem (carpal tunnel, cubital tunnel, Spurling-type radiculopathy) just because symptoms are "numbness-like"; COLOR CHANGE = arterial, DERMATOMAL TINGLING = neural. 191 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Venous TOS: named as the third subtype (subclavian vein compression → swelling/discoloration), not elaborated further in the source material. DIFFERENTIAL TRAPS AROUND TOS (from vignette reasoning) - Cubital tunnel syndrome (ulnar nerve at elbow): mimics C8/medial-hand-type symptoms (digits 4-5) but is provoked by ELBOW FLEXION with tenderness at the medial epicondyle groove — no pulse changes, no cervical rib, an elbow-level problem, not a proximal TOS problem. - Carpal tunnel syndrome (median nerve at wrist): wrong nerve and wrong fingers for TOS lower-trunk symptoms — carpal tunnel affects digits 1-3.5 (thumb/index/middle/radial half ring), diagnosed with Tinel/Phalen, not Adson/Wright. - Costoclavicular space is tested ONLY by the Military Posture/Costoclavicular maneuver (shoulders back+down) — Adson's head-rotation + deep-breath maneuver does NOT test costoclavicular compression, and Wright's overhead maneuver does NOT test the scalene triangle. Match maneuver to site precisely. ========================================================= ======= SECTION 3: LOW BACK / LUMBAR ========================================================= ======= CROSSED STRAIGHT LEG RAISE Tests for: Lumbar radiculopathy from a LARGE, CENTRAL disc herniation. Highly specific (though less sensitive than a plain SLR). How to perform: Raise the asymptomatic (good) leg straight, knee extended. Positive finding: Pain reproduced in the OPPOSITE (symptomatic) leg. Mnemonic: "Lift the GOOD leg and the BAD leg screams." Only a large central disc herniation does this, which is why it's far more specific than a plain SLR. PSOAS TENSION TEST Tests for: A tight iliopsoas driving lumbar somatic dysfunction. How to perform: Patient prone. Flex the knee to 90°, grasp the thigh, and extend the hip until the ASIS lifts off the table. Compare sides. Positive finding: Restricted range or quality of hip extension on the tight side. Mnemonic: "Lift the thigh off the table: a tight psoas stops it short and tugs the ASIS up early." ========================================================= ======= 192 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN SECTION 4: SACRUM / PELVIS ========================================================= ======= HIP DROP TEST Tests for: Lumbar and thoracolumbar sidebending. How to perform: Patient standing. Monitor iliac crest heights while they bend one knee, keeping that heel on the floor. Positive finding: NORMAL = the lumbar spine curves toward the opposite side AND the ipsilateral iliac crest drops more than 20-25 degrees. FAILURE of that crest to drop = LOST sidebending on that side. Mnemonic: "Bend the knee, heel stays down: the hip should drop and the spine curve away. No drop = stuck sidebending there." PELVIC SIDE SHIFT TEST Tests for: Whether the sacrum sits midline. How to perform: Patient standing, physician behind. Stabilize one shoulder and translate the pelvis toward that side, then repeat on the other side. Positive finding: Positive TOWARD the side of freer translation (the pelvis slides more easily that way). Mnemonic/BOARD TRAP: "The pelvis slides easier toward the dysfunction. Trap: a RIGHT psoas [dysfunction] drives a positive shift to the LEFT" — do not assume the positive side and the dysfunctional side are automatically the same side. LUMBOSACRAL SPRING TEST Tests for: A sacral base held posterior. How to perform: Patient prone. Place the heel of the hand over the lumbosacral junction and spring it anteriorly. Positive finding: Little or NO spring = sacral base posterior (also positive with bilateral or unilateral sacral extension, and with a backward sacral torsion). Mnemonic: "No give means the base is stuck back. A springy L5-on-S1 is the normal, healthy feel." SPHINX TEST (Backward Bending) Tests for: Sorting out whether a sacral base is held ANTERIOR vs POSTERIOR when the sacral sulci are asymmetric. How to perform: Patient prone, thumbs in the sacral sulci. Have them prop up on the elbows (the "sphinx" position) and recheck the sulci. 193 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Positive finding: If the depth difference WORSENS in sphinx → the SHALLOW side is held POSTERIOR. If the depth difference EVENS OUT (improves) → the DEEPER side was held ANTERIOR. Mnemonic: "Prop up like a sphinx: worse asymmetry blames the shallow (posterior) side, better symmetry blames the deep (anterior) side." OBER'S TEST Tests for: A tight tensor fascia lata (TFL) or iliotibial (IT) band. How to perform: Patient side-lying on the opposite (unaffected) side. Abduct and slightly extend the tested hip with the knee bent, then release/lower the leg. Positive finding: The thigh STAYS UP in abduction instead of dropping/adducting toward the table. Mnemonic: "A tight IT band will not let the leg fall." THOMAS TEST Tests for: A hip flexor (iliopsoas) contracture. How to perform: Patient supine, hugging both knees to the chest, then lowers ONE leg at a time toward the table. Positive finding: The lowered thigh LIFTS OFF the table (lumbar lordosis increases) on the tight side. Mnemonic: "Hug both knees, drop one: a tight psoas tents that thigh up off the table." PATRICK TEST (FABERE / FABER TEST) Tests for: Hip joint vs sacroiliac (SI) joint pathology (classically screens for hip osteoarthritis). How to perform: Supine, "figure-4" position: Flexion, ABduction, External Rotation, (+ Extension), while stabilizing the opposite ASIS. Positive finding: ANTERIOR groin pain = hip joint pathology; POSTERIOR (buttock/SI) pain = SI joint pathology. Mnemonic: "FABER spells the moves. Groin pain points to the hip, buttock pain points to the SI joint." Note (cross-reference to piriformis/SI differential): FABER stresses BOTH the piriformis and the SI joint nonspecifically — it is not piriformis- or SI-specific by itself; a more specific test (FAIR, or tender-point location at the sacral sulcus vs between lateral sacrum and greater trochanter) is needed to further localize when FABER alone is positive. (This nuance comes from the piriformis-syndrome material and is worth carrying into any FABER-positive vignette on this exam.) 194 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN ========================================================= ======= SECTION 5: KNEE ========================================================= ======= Test Position Maneuver Positive Finding Tests For Apley Compression Test Prone, knee flexed 90° Press straight DOWN through the heel while rotating the tibia in and out Pain with the downward grind Meniscal tear Apley Distraction Test Prone, knee flexed 90° Pull the foot UPWARD (traction) while rotating the tibia in and out Pain with traction Collateral ligament injury (MCL/LCL) Lachman Test Supine, knee flexed 20-30° Hold the distal femur, pull the proximal tibia forward Excessive anterior glide with a soft/mushy endpoint ACL integrity (the MOST SENSITIVE ACL test) McMurray Test Supine, knee fully flexed, hand on joint line External rotation + valgus, then extend (medial meniscus); OR internal rotation + varus (lateral meniscus) Palpable/audible click with pain Posterior meniscus tear (medial vs lateral by direction) Anterior Drawer Test (Knee) Supine, knee flexed 90°, foot stabilized Pull the tibia forward Tibia slides forward out from under the femur ACL (less sensitive than Lachman) Posterior Drawer Test (Knee) Supine, knee flexed 90°, foot stabilized Push the tibia backward Tibia sags/slides backward PCL Mnemonics: - Apley Compression: "Compress and grind the meniscus: push DOWN and it hurts = meniscus." - Apley Distraction: "Pull UP to unload the meniscus, so now pain = ligament, not meniscus. Compression vs distraction is the whole trick." - Lachman: "Small bend, pull the shin forward: a torn ACL feels like a drawer that slides with no stop." - McMurray: "External rotation + valgus = medial; internal + varus = lateral. The click is the torn flap catching." 195 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Drawer tests: "90-degree pull-forward = ACL. Lachman is the more sensitive cousin." / "Push back = PCL." ========================================================= ======= SECTION 6: WRIST / HAND ========================================================= ======= FINKELSTEIN TEST Tests for: De Quervain tenosynovitis — inflammation of the Abductor Pollicis Longus (APL) and Extensor Pollicis Brevis (EPB) tendons, which share the FIRST DORSAL COMPARTMENT of the wrist and pass over the radial styloid. How to perform: Tuck the thumb into a closed fist, then ULNAR DEVIATE the wrist. Positive finding: Sharp pain over the RADIAL STYLOID (maximal tenderness must be AT the styloid — see intersection syndrome trap below). Mnemonic/Classic stem: "New mother with radial-sided wrist pain from repetitively holding/lifting the baby (thumb abduction with wrist deviation) = De Quervain. Finkelstein confirms it." The fist + ulnar deviation stretches the inflamed tendons over the radial styloid like a bowstring. TINEL SIGN (Wrist) Tests for: Carpal tunnel syndrome — compression of the MEDIAN NERVE at the wrist. A NERVE test, unlike Finkelstein's tendon test. How to perform: Tap (percuss) lightly over the median nerve at the volar wrist crease, directly over the carpal tunnel. Positive finding: Electric tingling shooting into the thumb, index, middle, and the radial half of the ring finger (median distribution). Mnemonic: "Tinel = Tap. Tap the nerve, light up the fingers." Tinel also works at the ELBOW for the ULNAR nerve (cubital tunnel syndrome) — same percussion principle, different nerve/location. PHALEN TEST Tests for: Carpal tunnel syndrome / median nerve compression — same target as Tinel, different maneuver. How to perform: Press the backs of both hands together with the wrists fully FLEXED and fingers pointing down (the "backwards prayer" position), hold ~60 seconds. Wrist flexion narrows the carpal tunnel. 196 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Positive finding: Tingling/numbness in the median distribution (thumb, index, middle, radial half of ring finger). Mnemonic: "Backwards prayer, hold a minute." REVERSE PHALEN = same idea but palms together with wrists EXTENDED — either way you crush the tunnel and reproduce tingling. Condition Location of Max Tenderness Key Distinguishing Feature De Quervain tenosynovitis AT the radial styloid +Finkelstein at the styloid; classic "new mother" Intersection syndrome ~4 cm PROXIMAL to the radial styloid, dorsal forearm CREPITUS present (tendon-on-tendon friction, 1st/2nd compartment crossing); Finkelstein only MILDLY positive; classic in rowers Wartenberg syndrome Dorsal radial hand/thumb, sensory only Superficial RADIAL NERVE entrapment (compression, e.g. tight watchband/handcuffs); NUMBNESS, no crepitus, not a tendon problem Distal radius stress fracture Directly over bone Worsens with LOADING (gripping/axial compression); NO crepitus; imaging shows fracture line/marrow edema Extensor Carpi Ulnaris (ECU) tendinitis ULNAR side of dorsal wrist (6th compartment) Opposite side of the wrist from De Quervain/intersection syndrome Scapholunate ligament injury Dorsal wrist, with clicking Typically after a FALL; diagnosed with the Watson (scaphoid) shift test, NOT Finkelstein Triangular fibrocartilage complex (TFCC) injury ULNAR-sided wrist Aggravated by pronation-supination WITH axial load Scaphoid fracture Anatomical SNUFFBOX History of FOOSH (fall on outstretched hand); no Finkelstein correlation Lateral epicondylitis (tennis elbow) / ECRB pathology Lateral epicondyle (elbow), 2nd dorsal compartment Elbow-level, not wrist/styloid FCR (Flexor Carpi Radialis) tendinitis VOLAR (palmar) radial wrist Not reproduced by Finkelstein BOARD TRAP: A "mildly positive" Finkelstein plus tenderness proximal to (not at) the radial styloid, with crepitus, is INTERSECTION SYNDROME, not De Quervain — same tendon group (APL/EPB) but a different address along the "tracks." 197 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN ========================================================= ======= SECTION 7: SHOULDER ========================================================= ======= APLEY SCRATCH TEST Tests for: Rotator cuff range of motion — screens multiple cuff muscles in TWO motions (the only test on this list combining two motions). How to perform: (1) Hand BEHIND HEAD (external rotation + abduction) tests supraspinatus and infraspinatus. (2) Hand BEHIND BACK (internal rotation + adduction) tests subscapularis. Positive finding: Inability to reach, or pain, during either motion indicates the corresponding cuff muscle group is compromised. Mnemonic: "Hand UP behind head = external rotators. Hand DOWN behind back = internal rotator (subscapularis)." Key clinical use: distinguishing ROTATOR CUFF TEAR from ADHESIVE CAPSULITIS (see table below) — Apley scratch is a quick screen; compare with PASSIVE range of motion to localize the lesion. DROP ARM TEST (Codman Test) Tests for: Full-thickness rotator cuff tear, specifically of the SUPRASPINATUS (which initiates the first 15° of abduction and helps hold the arm out to the side). How to perform: Passively abduct the arm to ~90° (or full abduction), then ask the patient to slowly lower it back to the side. Positive finding: The arm drops suddenly or cannot be lowered smoothly, often giving out around 90°. Mnemonic: "Drop Arm = the rope is cut." Supraspinatus is torn, so nothing holds the arm on the way down — dead weight around 90°. "Apley screens ROM, Drop Arm catches the tear." SPEED TEST Tests for: Biceps tendon pathology (tendinitis, or SLAP lesion). How to perform: Resisted forward flexion of the shoulder with the ELBOW FULLY EXTENDED and forearm SUPINATED. Positive finding: Pain in the bicipital (intertubercular) groove, anterior shoulder. Mnemonic: "Speed = Straight arm." Elbow extended, forearm supinated, push up against resistance — loads the long head of biceps at its groove. YERGASON TEST 198 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Tests for: Biceps tendon pathology AND bicipital groove STABILITY — i.e., integrity of the TRANSVERSE HUMERAL LIGAMENT (the strap/roof over the bicipital groove that holds the long head of biceps tendon seated in place). How to perform: Elbow flexed at 90°. Patient attempts RESISTED SUPINATION of the forearm (often with added external rotation). Positive finding: Pain in the bicipital groove = tendinitis. A palpable POP or SNAP as the tendon jumps out of the groove = the transverse humeral ligament is torn (INSTABILITY/subluxation), not just tendinitis. Mnemonic: "Yergason = Yer-turn-yer-palm-up." Resist supination at 90°. Pain = inflamed tendon; a pop = the tendon escaping the groove because its ligament roof gave out. SPEED vs. YERGASON — BOTH target the bicipital groove, different arm setups: Speed = STRAIGHT arm, resist FLEXION. Yergason = BENT elbow (90°), resist SUPINATION. The maneuver description in a vignette tells you which test is being performed even if not named. ADHESIVE CAPSULITIS vs ROTATOR CUFF TEAR — THE SINGLE KEY DIFFERENTIATOR - LOSS OF PASSIVE range of motion = capsular disease (adhesive capsulitis / "frozen shoulder"). The capsule is physically locked, so even the EXAMINER cannot move the joint through full range. - PRESERVED passive ROM with WEAK ACTIVE motion = rotator cuff tear. The examiner CAN move the arm through full range; the patient cannot do it actively (the muscle/tendon is torn, not the capsule). - Findings that DO NOT differentiate (appear in BOTH conditions — common wrong-answer traps): weakness of external rotation, tenderness over the greater tuberosity, pain worse at night, and a positive Neer impingement sign (a stiff capsule causes reduced scapulohumeral rhythm that can mimic impingement). None of these isolate one diagnosis — only the ACTIVE-vs-PASSIVE ROM comparison does. - Clinical clue: adhesive capsulitis classically presents in diabetics, insidious onset, no trauma, bilateral-plane restriction (cannot reach behind back OR overhead) — Apley scratch quickly screens for this bilateral-plane loss. SLAP LESION (Superior Labrum Anterior-Posterior tear, at the biceps anchor) vs BICEPS TENDINITIS - Both can give a POSITIVE SPEED TEST. - CLICKING + a positive O'BRIEN ACTIVE COMPRESSION TEST = points to SLAP (superior labral biceps anchor pathology), typically in overhead athletes (e.g., volleyball servers). - Speed test positive ALONE, with NO clicking = more consistent with plain mid-substance biceps tendinitis (a "frayed rope," not a torn anchor). 199 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Rotator interval capsule pathology is a more diffuse cause of multidirectional laxity/biceps medial subluxation — can coexist with SLAP but is not the best answer when Speed + O'Brien + clicking specifically converge on the labral anchor. - Inferior glenohumeral ligament injury/instability (Bankart lesion) presents with APPREHENSION and a positive RELOCATION TEST after an anterior dislocation history — a different problem (instability, not clicking/groove pain). The transverse humeral ligament is the ROOF of the bicipital groove, holding the long head of biceps tendon inside its trough. If it tears, the tendon can SUBLUX (snap) out of the groove — reproduced by Yergason with a palpable pop. Do not confuse with: supraspinatus tear (abduction weakness, no role in groove containment), inferior glenohumeral ligament (anterior instability/apprehension, different mechanism entirely), superior glenohumeral ligament (limits inferior humeral head translation and excessive external rotation, not groove containment), or coracohumeral ligament (reinforces the rotator interval superiorly, does not form the lateral/medial walls of the groove). OTHER SHOULDER TESTS MENTIONED (as differential/distractor tests in vignettes — not given full "cards" but taught by contrast): - Neer impingement test: examiner PASSIVELY forward-flexes the arm while stabilizing the scapula (no patient resistance) — tests for subacromial impingement; can be positive in both rotator cuff pathology AND adhesive capsulitis (not a reliable sole differentiator). - Hawkins test: mentioned alongside Neer as another impingement test. - Empty can test: arm at 90° abduction + 30° forward flexion + thumbs pointed down, resist a downward force — targets supraspinatus specifically. - O'Brien active compression test: used with Speed test/clicking to support a SLAP lesion diagnosis. - Apprehension test / Relocation test: anterior shoulder instability (Bankart lesion) — patient guards/grabs the examiner's arm during simulated anterior translation; relocation (posteriorly directed pressure) relieves the apprehension. - Lift-off test / Belly-press test: assess SUBSCAPULARIS (an internal rotator) — not stressed by resisted supination (that's biceps/Yergason territory). Cross-body adduction test: assesses the ACROMIOCLAVICULAR (AC) joint — AC arthritis/separation causes localized AC joint pain, worsened by cross-body adduction, typically after direct trauma (fall/tackle onto the point of the shoulder) — NOT a global ROM-loss presentation like adhesive capsulitis. ========================================================= ======= SECTION 8: OTHER DIFFERENTIAL TESTS MENTIONED (non-shoulder, non-wrist) ========================================================= ======= 200 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Sharp-Purser test: screens for ATLANTOAXIAL INSTABILITY (transverse ligament/dens problem) — used in RA, Down syndrome, odontoid fracture; distinct pre-HVLA screen from the vertebral artery (Wallenberg-type) test. - Watson (scaphoid) shift test: diagnostic maneuver for SCAPHOLUNATE LIGAMENT injury (dorsal wrist pain + click, usually after a fall) — not Finkelstein's job. ========================================================= ======= QUIZ / VIGNETTE HIGHLIGHTS (26 vignettes + 2 elimination games — condensed) ========================================================= ======= Intro teaser: 34M rock climber, arm pain/tingling after a fall; cervical extension + sidebend toward painful side + axial load reproduces sharp pain into the R C6 dermatome → SPURLING TEST (not Adson/Wallenberg/Apley scratch — those test different structures entirely). V1: 22F, medial two-digit weakness/numbness worse carrying bags, rudimentary cervical rib on imaging; head extended + rotated right + deep breath → diminished pulse + paresthesias = positive ADSON → answer: compression between anterior scalene and the CERVICAL RIB (scalene triangle) — not costoclavicular (that's military brace), not cubital tunnel (elbow flexion-provoked, medial epicondyle tender, no pulse change), not subcoracoid/pec minor (that's Wright), not carpal tunnel (wrong nerve/fingers — median, digits 1-3.5). V2: 62F retired teacher, progressive difficulty reaching behind back/overhead, no trauma; Apley scratch LIMITED in both directions AND passive ROM equally restricted, labs normal → ADHESIVE CAPSULITIS, not rotator cuff tear (which preserves passive ROM), not biceps tendinitis (groove pain, +Speed/Yergason), not AC arthritis (localized, worse with cross-body adduction), not cervical radiculopathy (dermatomal pain, +Spurling). V3: 34M weightlifter, arm numbness/coolness with overhead press; hyperabduction to 180° + pulse palpation → pulse disappears + tingling = positive WRIGHT → answer: PECTORALIS MINOR TENDON (subcoracoid space) — not anterior scalene (Adson's job), not subclavius/costoclavicular (military brace), not cervical rib (bony, scalene triangle), not the coracoid process itself (landmark, not the compressing soft tissue). V4: 40F, numbness blow-drying hair; bilateral Adson: RIGHT side = pulse diminished + symptoms reproduced (TRUE positive); LEFT side = pulse diminished but NO symptoms (normal variant, up to ~50% false-positive rate for pulse change alone) → answer: the test has poor specificity — pulse change alone is insufficient, symptom reproduction required; NOT subclavian steal (different mechanism — arm-exercise-induced vertebrobasilar symptoms via retrograde vertebral flow), NOT bilateral surgical TOS, NOT calling the right side a false positive (it's the true positive). V5: 60M cervical spondylosis, numbness ring/little fingers + grip weakness; Spurling (extend + R sidebend + axial compression) → pain/tingling into medial forearm + digits 4-5 = C8 radiculopathy → FINGER FLEXOR REFLEX diminished (not triceps=C7, not 201 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN biceps/brachioradialis=C5-6, not patellar=L3-4). V6: 35M rower, dorsal forearm pain 4cm PROXIMAL to the radial styloid (not AT it), crepitus present, Finkelstein only MILDLY positive → INTERSECTION SYNDROME, not De Quervain (which requires max tenderness AT the styloid), not Wartenberg (pure sensory nerve compression, no crepitus), not distal radius stress fracture (bony, no crepitus), not ECU tendinitis (ulnar side, 6th compartment — wrong side of the wrist). V7: 47M mechanic, shoulder pain radiating to lateral UPPER ARM + DELTOID weakness, +Spurling reproduces shoulder pain, BICEPS REFLEX INTACT, EMG shows denervation in both deltoid (axillary n.) AND biceps (musculocutaneous n.) → C5 RADICULOPATHY (root-level lesion spanning two different peripheral nerves = root problem, not peripheral) — not C6 (board trap: C6 also feeds biceps reflex, but deltoid is not C6 territory — C6 = thumb/lateral forearm/wrist extensors), not C7 (middle finger/triceps), not C8 (medial hand), not C4 ("cape" shoulder only, no arm muscle weakness). V8: 70F cervical OA/HTN, pre-HVLA screen: extend + rotate head right, hold 30s → nausea + LEFT facial numbness, BP 142/86, neuro exam normal → positive vertebral artery screen = ABSOLUTE contraindication → answer: CANCEL cervical HVLA, use muscle energy instead — not a "modified" HVLA (no safe modification exists), not cervical traction (wrong indication), not CTA-first (positive clinical screen alone is sufficient to cancel), not repeating the test to confirm (adds unnecessary risk). V9: 26F violinist, numbness/tingling worse during performance, medial forearm + digits 4-5; extend arm + rotate head TOWARD affected side + deep breath → pulse diminishes + symptoms reproduced = ADSON TEST (not Allen-arterial patency, not Wright-hyperabduction/overhead, not Roos-EAST fist-pumping, not Spurling-cervical). V10: 29F swimmer, arm heaviness/numbness with freestyle; Adson NEGATIVE, then hyperabduction → pulse weakens + symptoms reproduced = positive WRIGHT → answer: SUBCORACOID SPACE (pectoralis minor) compression — not costoclavicular (military brace), not interscalene triangle (ruled out by negative Adson), not carpal/cubital tunnel (wrong distribution, no pulse changes). V11: 44M recreational ballplayer, anterior shoulder pain worse throwing; Neer NEGATIVE, elbow at 90° + forceful resisted supination → deep anterior pain = positive YERGASON → answer: BICEPS TENDINITIS in the intertubercular groove — not supraspinatus tear (Neer negative; wrong test set anyway — empty can/Neer/Hawkins), not Bankart lesion (no instability/dislocation history/apprehension), not AC separation (no trauma, wrong location), not subscapularis tear (internal rotator, tested by lift-off/belly-press, not resisted supination). V12: 52M accountant, neck pain radiating to LATERAL FOREARM + THUMB, worse looking up; Spurling (extend + R sidebend + axial compression) reproduces pain → C6 RADICULOPATHY (biceps reflex, wrist extensors, thumb sensation) — not C5 (deltoid/lateral arm, no thumb), not C7 (middle finger/triceps), not C8 (digits 4-5/medial hand), not T1 (medial forearm/hand intrinsics). 202 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN V13: 42F chef, radial wrist pain 6wk worse chopping/wringing, no trauma, tender AT the radial styloid; Finkelstein (thumb-in-fist + ulnar deviation) reproduces sharp pain → DE QUERVAIN TENOSYNOVITIS (APL + EPB, first dorsal compartment) — not scapholunate ligament (dorsal pain + click after a fall, diagnosed with Watson test), not TFCC (ulnar-sided, worse with pronosupination + axial load), not ECRB/lateral epicondylitis (pain at the elbow, 2nd compartment), not FCR (volar radial pain). V14: 55F diabetic, 6 months progressive shoulder stiffness, cannot reach behind back or overhead; BOTH active (limited on reaching) AND PASSIVE ROM equally restricted → ADHESIVE CAPSULITIS; the SINGLE BEST differentiator from rotator cuff tear = LOSS OF PASSIVE ROM (cuff tear preserves passive ROM with weak active motion). ER weakness, tuberosity tenderness, night pain, and a positive Neer sign all occur in BOTH conditions and cannot differentiate them. V15: 58M, pre-HVLA screen: extend + rotate head, hold 30s → dizziness + nystagmus + slurred speech, BP normal (112/74) → VERTEBRAL ARTERY compromise (feared outcome = Wallenberg/lateral medullary syndrome) — not thyrocervical trunk (branches to thyroid/scapula, no brainstem symptoms), not internal carotid (anterior circulation, enters via carotid canal, not compressed by this maneuver), not subclavian artery (tested by Adson/Wright, not cervical extension-rotation), not external carotid (face/scalp/meninges only). V16: 65M s/p cervical HVLA WITHOUT screening, 2 hours later sudden vertigo + dysphagia + hoarseness + ipsilateral face & contralateral body pain/temperature loss; MRI = right lateral medullary infarct → dissected RIGHT VERTEBRAL ARTERY (the vessel actually injured during manipulation — PICA is downstream infarct territory, not the dissected vessel itself) — distractors: anterior spinal artery syndrome (bilateral symmetric motor + pain/temp loss below a level, spared proprioception — wrong, this case is crossed/lateralized), basilar artery occlusion (locked-in syndrome/quadriplegia — wrong, this is lateralized not bilateral), internal carotid dissection (anterior circulation, contralateral face+arm weakness ± aphasia — wrong distribution/wrong circulation). V17: Med student lists the 5 D's, asked for the 3 additional findings → NAUSEA, NYSTAGMUS, NUMBNESS OF THE FACE (the 3 N's) — distractor N-word lists (nightsweats/nosebleeds/neck crepitus; neuralgia/neurosis/neck tenderness; neck pain/stiffness/spasm [these are actually the INDICATIONS for treatment, not contraindications]; narrow pulse pressure/nasal congestion/night blindness) are all unrelated to brainstem/vestibular/trigeminal ischemia. V18: 55F FOOSH, anterior shoulder pain + SNAPPING with forearm rotation; +Yergason reproduces the snap AND a palpable tendon subluxation out of the groove → TRANSVERSE HUMERAL LIGAMENT TEAR (roof of the bicipital groove) — not supraspinatus (abduction weakness, no groove-containment role), not inferior GH ligament (anterior instability/apprehension, different problem), not superior GH ligament (limits inferior translation/ER, not groove containment), not coracohumeral ligament (reinforces rotator interval, not the groove roof). V19: 50M house painter, anterior shoulder pain 4wk; resisted shoulder FLEXION with elbow EXTENDED + forearm SUPINATED → pain localizes to the intertubercular groove (= SPEED 203 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN TEST) → LONG HEAD OF BICEPS TENDON pathology — not infraspinatus/teres minor (posterior, tested by resisted ER), not supraspinatus (lateral pain, empty can test), not superior labrum directly (ultrasound shows the tendon in the groove, not the labrum; MRI is better for SLAP). V20: 48M construction worker, anterior shoulder pain worse overhead lifting; elbow EXTENDED + forearm SUPINATED + resisted FORWARD FLEXION → sharp groove pain = SPEED TEST (not Neer — passive flexion, no resistance; not Apley scratch — ROM screen, no resistance; not Yergason — elbow flexed + resisted supination, wrong position; not drop arm — supraspinatus/passive lowering test). V21: 28F volleyball player, deep anterior shoulder pain + CLICKING with overhead serves; BOTH Speed AND O'Brien positive → SUPERIOR LABRUM AT THE BICEPS ANCHOR (SLAP lesion) — clicking + positive O'Brien is what separates a SLAP lesion from plain mid-substance biceps tendinitis (Speed positive alone, no click); not rotator interval capsule (diffuse instability/subluxation pattern, doesn't match this specific combo), not inferior GH ligament (instability/apprehension, not clicking), not supraspinatus (lateral pain, +empty can/Neer/Hawkins, not Speed/O'Brien). V22: 62M, before cervical HVLA physician sustains extension + rotation, holds 30s, patient denies all 5 D's/3 N's → physician proceeds; student asks what was screened for → VERTEBRAL ARTERY INSUFFICIENCY — not atlantoaxial instability (screened by Sharp-Purser test; relevant to RA/Down syndrome/odontoid fracture), not TOS (tested by Adson/Wright/Roos, different anatomy, not a cervical HVLA contraindication in this sense), not cervical disc herniation/radiculopathy (tested by Spurling, dermatomal pain not vascular symptoms). V23: 31M electrician, hand pallor/coldness with arms overhead; Adson NEGATIVE, arm abducted to 180° → hand turns pale within 30s (ARTERIAL/vascular TOS — rare but dangerous subtype, distinct from the ~95%-common neurogenic TOS) → best ADDITIONAL supporting finding = DIMINISHED RADIAL PULSE DURING HYPERABDUCTION (positive Wright) — not Phalen/Tinel (median nerve/carpal tunnel, wrong mechanism), not Spurling (cervical radiculopathy, dermatomal not vascular), not lateral epicondyle tenderness (tennis elbow, wrong joint/mechanism). Pallor = arterial, not neural. V24: 38M tennis player, anterior shoulder pain worse serving; elbow at 90° + resisted forearm SUPINATION → bicipital groove pain (= YERGASON TEST) → LONG HEAD OF BICEPS TENDON — not subscapularis (internal rotator, tested by lift-off/belly-press), not infraspinatus (external rotator, posterior pain), not coracobrachialis (medial arm pain with flexion/adduction), not supraspinatus (lateral pain, empty can/drop arm). V25: 45M software engineer, neck pain radiating to the MIDDLE FINGER (C7 pattern); +Spurling on the left, then physician applies CERVICAL DISTRACTION (gentle upward traction) → immediate relief of radiating pain → answer: OPENING OF THE INTERVERTEBRAL FORAMEN (Spurling closes the foramen/reproduces pain; distraction opens it/relieves pain — complementary tests confirming foraminal nerve root compression) — not facet joint adhesion, not vertebral artery decompression (wrong maneuver, wrong symptom type — this is radicular pain, not vertebrobasilar), not meniscoid entrapment (would be localized pain without dermatomal radiation), not anterior scalene relaxation (a TOS mechanism tested by Adson, 204 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN unrelated to this C7 dermatomal picture). V26: 30F, 6-week right wrist pain since childbirth, worse lifting/holding the infant, tender AT the radial styloid; Finkelstein (thumb-in-fist + ulnar deviation) reproduces sharp pain → DE QUERVAIN TENOSYNOVITIS (classic "new mother" presentation) — not carpal tunnel syndrome (median nerve, digits 1-3.5, diagnosed with Tinel/Phalen not Finkelstein), not trigger thumb (A1 pulley, palmar clicking/locking), not ganglion cyst (visible transilluminant dorsal mass, not described here), not scaphoid fracture (snuffbox tenderness after a FOOSH — no trauma history here). ELIMINATION GAME 1: 42F guitarist, numbness/tingling in the right hand worsens sleeping with arm above her head; exam reproduces symptoms with a specific arm position while monitoring the pulse → WRIGHT TEST (Hyperabduction; pectoralis minor/subcoracoid compression) — ruled out Spurling (no neck/radicular symptoms), Adson (head-turn mechanism, not overhead arm positioning), Finkelstein and Speed (tendon tests — neither involves pulse monitoring). ELIMINATION GAME 2: 55M scheduled for cervical HVLA; before thrusting, physician positions the head a specific way and watches for NEUROLOGICAL signs (not radicular pain, not pulse changes, not tendon pain) → WALLENBERG TEST (pre-HVLA vertebral artery/safety screen) — ruled out Yergason and Apley Scratch (shoulder tests, irrelevant to cervical safety), Adson (TOS/pulse monitoring, not a neuro safety screen), Spurling (tests nerve root compression, not vertebrobasilar safety). ========================================================= ======= MEMORY HOOKS ========================================================= ======= - Spurling: extend + sidebend TOWARD symptomatic side + compress — "shrinking the neural foramen to see if the nerve screams." Sidebend is TOWARD, not away. - Cervical distraction: the opposite of Spurling — opens the foramen, relieves radicular pain. Spurling closes/reproduces; distraction opens/relieves. - Wallenberg / vertebral artery screen: extend + rotate + hold 30 sec, watch for 5 D's/3 N's. MUST be done before every cervical HVLA. Any positive sign = absolute stop, no modified technique, no repeat-testing, no imaging-first — just cancel and use a safer technique. 5 D's: Dizziness, Drop attacks, Diplopia, Dysarthria, Dysphagia. 3 N's: Nausea, Nystagmus, Numbness (face). "One positive sign is enough." - Sharp-Purser test ≠ Wallenberg test: Sharp-Purser screens ATLANTOAXIAL instability (ligament/dens); Wallenberg-type extension-rotation screens the VERTEBRAL ARTERY (blood flow). Different structure, different mechanism. - Adson = "Add-toward." Head turns TOWARD the affected side; scalene pinches the subclavian artery against the first rib. 205 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Wright = "Right up." Arm goes straight up (hyperabduction); pec minor catches the neurovascular bundle like a clothesline. - Military Posture = "Attention!" Chest out, shoulders down and back; the collarbone clamps the first rib in the costoclavicular vise. - TOS pulse rule: pulse change ALONE means nothing (up to 50% false-positive in normal people) — you need SYMPTOM REPRODUCTION matching the chief complaint for a true positive. - Crossed SLR: "Lift the GOOD leg and the BAD leg screams" — only a big central disc does that; more specific than a plain SLR. - Psoas tension test: "Lift the thigh off the table: a tight psoas stops it short and tugs the ASIS up early." - Hip Drop: "Bend the knee, heel stays down: the hip should drop and the spine curve away. No drop = stuck sidebending there." - Pelvic Side Shift: "The pelvis slides easier toward the dysfunction" — but BOARD TRAP: a right psoas dysfunction can drive a positive shift to the LEFT. - Lumbosacral Spring: "No give means the base is stuck back. A springy L5-on-S1 is the normal, healthy feel." - Sphinx test: "Prop up like a sphinx: worse asymmetry blames the shallow (posterior) side, better symmetry blames the deep (anterior) side." - Ober's: "A tight IT band will not let the leg fall." - Thomas test: "Hug both knees, drop one: a tight psoas tents that thigh up off the table." - Patrick/FABER: "FABER spells the moves. Groin pain points to the hip, buttock pain points to the SI joint." - Apley Compression vs Distraction: "Push DOWN and it hurts = meniscus. Pull UP to unload the meniscus, so pain = ligament, not meniscus." - Lachman: "Small bend, pull the shin forward: a torn ACL feels like a drawer that slides with no stop." Most sensitive ACL test. - McMurray: "External rotation + valgus = medial; internal + varus = lateral. The click is the torn flap catching." - Drawer tests: "90-degree pull-forward = ACL (Lachman is the more sensitive cousin). Push back = PCL." - Finkelstein: "New mother with wrist pain from holding the baby = De Quervain." Thumb-in-fist + ulnar deviation stretches APL/EPB over the radial styloid like a bowstring. - Location differentiates wrist pain: AT the radial styloid = De Quervain; 4cm PROXIMAL with crepitus = intersection syndrome; ULNAR side = ECU/TFCC; SNUFFBOX = scaphoid fracture. - Tinel: "Tinel = Tap. Tap the nerve, light up the fingers." Works at the wrist (median) or elbow (ulnar/cubital tunnel). 206 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Phalen: "Backwards prayer, hold a minute." Reverse Phalen = palms together, wrists extended — same tunnel-crushing idea. - Apley Scratch: "Hand UP behind head = external rotators (supraspinatus/infraspinatus). Hand DOWN behind back = internal rotator (subscapularis)." - Adhesive capsulitis vs rotator cuff tear: "Capsule LOCKED = both active AND passive ROM lost. Muscle TORN = only active ROM lost, passive is preserved." This is the only reliable differentiator — ER weakness, tuberosity tenderness, night pain, and +Neer occur in BOTH. - Drop Arm = "the rope is cut" — supraspinatus torn, arm drops around 90° on the way down. Codman test = same thing. - Speed = "Straight arm" (elbow extended, forearm supinated, resist flexion) → bicipital groove pain. - Yergason = "Yer-turn-yer-palm-up" (elbow at 90°, resist supination) → groove pain = tendinitis; a POP = transverse humeral ligament tear/subluxation. - SLAP vs biceps tendinitis: CLICKING + positive O'Brien = SLAP (labral anchor); Speed positive alone with no click = tendinitis. - TOS three choke points, three tests: Adson = scalene triangle (head toward + deep breath). Military Posture = costoclavicular space (shoulders back/down). Wright = subcoracoid space (arm overhead). Match the maneuver to the site. - TOS subtypes: Neurogenic (~95%, most common) vs Arterial (rare, dangerous — pallor/coolness/pulse loss) vs Venous (swelling/discoloration). - Wallenberg syndrome = CROSSED sensory pattern (ipsilateral face, contralateral body) + vertigo/dysphagia/hoarseness — from vertebral artery dissection during unscreened cervical HVLA. Contrast: anterior spinal artery = bilateral symmetric, spared proprioception. Basilar occlusion = locked-in syndrome. Internal carotid dissection = anterior circulation (contralateral face+arm weakness, aphasia). - General exam rule (recurring across nearly every vignette): pick the answer that explains the WHOLE presentation — pulse changes need symptom reproduction, ROM loss needs the active-vs-passive comparison, wrist pain needs precise tenderness location, and radicular findings need the full dermatome/myotome/reflex match — not just one isolated clue in the stem. 207 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Low Back Pain: Red Flags & OMT Approach LOW BACK PAIN: RED FLAGS, SPONDY TRIAD, SCOLIOSIS & OMT MECHANICS — CONDENSED STUDY NOTES OVERVIEW: Low back pain is the #1 reason patients seek osteopathic care. This page's teaching spine is: (1) tell apart the three "spondy" look-alikes (spondylosis/spondylolysis/spondylolisthesis), (2) separate mechanical pain generators (facet vs disc) from inflammatory/red-flag disease (ankylosing spondylitis, cauda equina) using pattern recognition, (3) localize lumbosacral nerve root lesions and differentiate neurogenic from vascular claudication, (4) apply Fryette's Laws (Type I vs Type II somatic dysfunction) and sacral torsion mechanics to structural diagnosis, and (5) know the OMT/MET/counterstrain positioning logic for psoas and lumbar dysfunctions. Recurring exam principle: the objective/positional finding (imaging, provocation direction, reflex, sphinx response) is always the discriminator — pick the answer that explains the WHOLE presentation, not just one isolated clue. ========================================================= === SECTION 1: THE SPONDY TRIAD — SOUND-ALIKE NAMES, DIFFERENT PATHOLOGY ========================================================= === QUICK CHALLENGE (opening board question): A fracture through the pars interarticularis visible as a "collar" on the Scotty Dog on oblique X-ray = SPONDYLOLYSIS (not spondylosis, not spondylolisthesis). SPONDYLOSIS — Degeneration ("Old Spine, Osteoarthritis Situation"): - General degenerative changes of the spine: disc dehydration, osteophyte formation, facet joint arthropathy. Wear and tear = "arthritis of the spine." - Key imaging: osteophytes, disc space narrowing, sclerotic changes on plain film. NO fracture, NO slippage. - Clinical significance: most common cause of CHRONIC low back pain in older adults; osteophytes can compress the canal → spinal stenosis. - Mnemonic: SpondylOSIS = "-osis" ending screams chronic process, not acute injury. SPONDYLOLYSIS — Fracture ("Lysis = breaking apart"): - A stress fracture of the PARS INTERARTICULARIS, typically from repetitive hyperextension. Classic patient: young athlete (gymnast, football lineman). - Key imaging: "Scotty Dog" on oblique X-ray — fracture appears as a "collar" around the dog's neck (the neck IS the pars interarticularis). - Clinical significance: if BILATERAL, the vertebral body is disconnected from the posterior elements and can slip forward → spondylolisthesis. - Mnemonic: the dog got a collar because its neck (pars) broke. 208 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN SPONDYLOLISTHESIS — Slippage ("Listhesis" = Greek, to slip): - Anterior slippage of one vertebra over the one below; visible "step-off" on lateral X-ray (anterior vertebral body borders no longer line up). - Most common at L5-S1. Can result from bilateral spondylolysis (isthmic type) or degenerative facet changes. May compress nerve roots if severe. - Graded by MEYERDING CLASSIFICATION (Grade I-V, by % anterior displacement): - Grade I = 0-25% - Grade II = >25-50% - Grade III = >50-75% - Grade IV = >75-100% - Grade V = >100% ("spondyloptosis" — vertebra has completely fallen off the one below) - BOARD TRAP: boundary values belong to the LOWER grade — exactly 25% displacement = Grade I (ceiling of Grade I), NOT the floor of Grade II. Each 25-point window = one grade. - Bilateral spondylolysis is the SETUP; spondylolisthesis is the CONSEQUENCE. ONE-LINE RECALL FOR THE TRIAD: "-lysis = fracture. -listhesis = slip. -osis = degeneration." BOARD TRAP — Spondylosis vs Spondylolysis vs Spondylolisthesis wording games: exam stems often hand you the disqualifier in plain language ("no pars defects," "no anterior slippage," "no slippage") — read literally. "No slippage" rules out spondylolisthesis even if a pars defect is present (= spondylolysis alone, not yet progressed). "No pars defects" rules out spondylolysis. Age + mechanism also separate them: young athlete + hyperextension = spondylolysis; elderly + osteophytes/disc narrowing = spondylosis. The lumbar vertebra viewed obliquely resembles a Scottish Terrier in profile: - Ear = superior articular process - Eye = pedicle - Nose = transverse process - Neck (PARS interarticularis) = the fracture site in spondylolysis ("collar" sign) - Front Leg = inferior articular process - Body = lamina DISH (Diffuse Idiopathic Skeletal Hyperostosis) — the other "calcified elderly spine" mimic of spondylosis: - Flowing calcification along the ANTERIOR longitudinal ligament, but disc spaces are PRESERVED (this is the distinguishing feature vs. spondylosis, which narrows disc spaces). - BOARD TRAP: DISH and spondylosis both show "calcification + elderly spine," but disc space narrowing = spondylosis; disc space PRESERVATION with flowing anterior calcification 209 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN = DISH. ("Confusing plaque on the outside of a pipe for the pipe being collapsed.") ========================================================= === SECTION 2: INFLAMMATORY / RED-FLAG BACK PAIN — ANKYLOSING SPONDYLITIS & MIMICS ========================================================= === CORE PATTERN-RECOGNITION RULE: mechanical back pain (spondylosis, facet, disc) WORSENS with activity and improves with rest; INFLAMMATORY back pain (ankylosing spondylitis and other spondyloarthropathies) IMPROVES with activity and has morning stiffness — this direction-of-improvement clue is the single biggest differentiator tested. ANKYLOSING SPONDYLITIS (AS) — prototypical seronegative spondyloarthropathy: - Classic profile: young male, chronic low back pain, MORNING STIFFNESS THAT IMPROVES WITH ACTIVITY, HLA-B27 positive, X-ray shows BILATERAL SYMMETRIC SI joint sclerosis. - Differentiate from: - DDD/spondylosis: mechanical, age-related, WORSENS with activity (opposite of AS's inflammatory pattern); wrong age (elderly vs. young). - Psoriatic arthritis: also can be HLA-B27 associated and axial, but SI joint involvement is typically ASYMMETRIC, and diagnosis requires skin/nail findings (plaques, nail pitting) — absent here. - Spondylolysis: mechanical pars stress fracture in young hyperextension athletes — no SI joint involvement, no HLA-B27 association, no inflammatory stiffness pattern. Different disease entirely despite both hitting "young patients." - Reactive arthritis (formerly Reiter syndrome): also HLA-B27 associated and hits SI joints (real trap), BUT requires a preceding GI/GU infection and the classic triad of arthritis + urethritis + conjunctivitis 1-4 weeks post-infection. No infectious trigger in the stem eliminates this. - BOARD TRAP: AS vs reactive arthritis — both HLA-B27, both sacroiliitis. The separator is the TRIGGER: reactive arthritis needs a preceding GI/GU infection + urethritis/conjunctivitis triad; AS has no infectious trigger requirement. ========================================================= === SECTION 3: MECHANICAL PAIN GENERATORS — FACET vs DISC (OPPOSITE PROVOCATION PATTERNS) ========================================================= === FACET ARTHROPATHY (facet syndrome) 210 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Pain worst at END OF DAY, improves with rest, NO morning stiffness (distinguishes from inflammatory disease). - Aggravated by EXTENSION and ROTATION (facets are loaded in extension and rotation). - Imaging: facet joint hypertrophy. - Differentiate from stenosis (bilateral leg claudication with walking — absent here, isolated LBP) and from SI joint dysfunction (which is provoked by joint-specific tests: FABER/Patrick's, Gaenslen's, sacral compression/distraction — not by lumbar extension/rotation). DISC PAIN (herniation/bulge) - Signature pattern: WORSE with FLEXION and SITTING, better with STANDING and EXTENSION — the exact OPPOSITE of facet pain. - Mechanism: flexion shifts the nucleus pulposus POSTERIORLY and INCREASES intradiscal pressure; with a posterior disc bulge/herniation, this pushes the nucleus further into the herniation, worsening compression of neural elements. - Sitting increases disc pressure even more than standing (Nachemson's classic pressure measurements) — counterintuitive but heavily tested: seated flexion INCREASES intradiscal pressure vs. standing, it does NOT reduce it. - McKenzie extension exercises are therapeutic for posterior disc bulges because extension shifts the nucleus back ANTERIORLY, off the herniation. - Facet vs disc one-liner: "Extension + rotation = facet. Flexion + sitting = disc. Opposite patterns." BOARD TRAP — Facet vs Disc vs Stenosis vs Myofascial vs SI joint (5-way differential logic): when a stem gives (a) provocation direction, (b) imaging finding, and (c) presence/absence of leg symptoms, use ALL THREE together. Isolated LBP + extension/rotation pain + facet hypertrophy on X-ray = facet (not disc [wrong direction], not stenosis [no bilateral leg claudication], not myofascial [myofascial doesn't produce bony X-ray changes], not SI joint [SI is diagnosed by joint-specific provocation tests, not spinal extension/rotation]). ========================================================= === SECTION 4: NEUROGENIC CLAUDICATION (SPINAL STENOSIS) vs VASCULAR CLAUDICATION vs MIMICS ========================================================= === LUMBAR SPINAL STENOSIS / NEUROGENIC CLAUDICATION - Classic presentation: bilateral leg pain/numbness that WORSENS with WALKING and STANDING (extension narrows the canal) and IMPROVES with SITTING or LEANING FORWARD/FLEXION (flexion opens the canal). 211 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Mechanism: extension of the lumbar spine narrows the spinal canal (laminae approximate, ligamentum flavum buckles/folds inward); flexion does the opposite — separates the laminae, stretches the ligamentum flavum taut, and INCREASES canal diameter. - "SHOPPING CART SIGN" — pathognomonic: patients get relief leaning forward on a shopping cart (flexed posture) while walking. - Patients CAN ride a stationary bicycle symptom-free because cycling = sustained lumbar FLEXION = canal stays open, even though it is aerobic exercise like walking. - BOARD TRAP (why cycling is painless — 5-way distractor logic): - NOT core strengthening (that's a weeks-long training adaptation; relief here is immediate/positional). - NOT reduced disc pressure (seated flexion actually INCREASES intradiscal pressure vs. standing — the opposite of the proposed mechanism). - NOT increased blood flow (walking is also aerobic and increases flow just as much, yet walking still hurts — blood flow cannot be the differentiator). - NOT venous congestion relief (a real but minor/secondary contributor — the primary, testable mechanism is mechanical canal enlargement with flexion). - CORRECT: flexion mechanically opens the canal (separates laminae, stretches ligamentum flavum) — walking/standing = extension = canal narrows = pain; cycling = flexion = canal open = pain-free. VASCULAR CLAUDICATION (peripheral arterial disease) — the classic mimic: - Pain with walking that is INDEPENDENT of position — muscles cannot get adequate blood flow during ANY exercise that demands it, regardless of spinal posture. Walking, running, AND biking all provoke pain equally. Differentiator from neurogenic claudication: PAD pain does NOT improve with flexion/leaning forward and IS provoked by cycling too (since cycling still requires leg muscle perfusion); neurogenic claudication is fully relieved by flexion/biking because the mechanism is canal-based, not vascular. - Rule: "Neurogenic vs vascular: both cause leg pain with walking — neurogenic improves with flexion and allows pain-free biking; vascular is unaffected by position and hurts with any exertion, improving only with REST." OTHER MIMICS RULED OUT IN THE STENOSIS VIGNETTE - Piriformis syndrome: UNILATERAL sciatic-type pain from external hip rotator compression, provoked by a specific position (sitting/internal rotation), not by extension/walking distance — cannot produce BILATERAL neurogenic claudication. - Cauda equina syndrome: an ACUTE emergency (saddle anesthesia + urinary retention + bilateral leg weakness together) — this vignette describes CHRONIC positional pain with no bladder/saddle involvement; different tier of urgency entirely. 212 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Disc herniation: usually UNILATERAL radiculopathy in a dermatomal pattern, WORSE with flexion (pushes nucleus posteriorly into the nerve) — opposite position-response from stenosis, which improves with flexion; also usually unilateral, not bilateral. ========================================================= === SECTION 5: RED FLAG EMERGENCY — CAUDA EQUINA SYNDROME ========================================================= === CARDINAL FEATURES (the triad/tetrad to memorize): acute low back pain + BILATERAL lower extremity weakness + SADDLE ANESTHESIA + URINARY RETENTION. Any combination of saddle numbness + bladder dysfunction + bilateral weakness = surgical emergency until proven otherwise. MOST APPROPRIATE NEXT STEP: URGENT MRI of the lumbar spine, followed by EMERGENT SURGICAL DECOMPRESSION within 48 HOURS to maximize nerve recovery and minimize permanent deficit. WHY THE OTHER OPTIONS ARE WRONG (full elimination logic) - Oral NSAIDs + follow-up: appropriate for ordinary mechanical back pain, NOT for a surgical emergency — every hour of delay narrows the window for neurologic recovery. - CT myelogram: does image the canal but is INVASIVE (requires intrathecal contrast injection); it is the FALLBACK when MRI is contraindicated (e.g., certain pacemakers/metal implants) — MRI is faster, non-invasive, and equally diagnostic, so MRI comes first when available. - EMG: assesses CHRONIC nerve damage over weeks-to-months; useless for a same-day acute compression emergency. - Lumbar X-ray: shows bone only; the compressive lesion (typically a large central/posterolateral disc) is soft tissue and INVISIBLE on plain film. KEY NUMBERS: 48-hour surgical window from symptom onset is the board-tested cutoff for decompression. Most common cause = large central disc herniation compressing the cauda equina. ========================================================= === SECTION 6: LUMBOSACRAL NERVE ROOT LOCALIZATION ========================================================= === 213 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN ROOT-BY-ROOT MOTOR/SENSORY/REFLEX SIGNATURES (high-yield table) - L3: ANTERIOR thigh, hip flexion + knee extension, PATELLAR reflex (shared with L4). - L4: MEDIAL leg, dorsiflexion (shared with L5) + knee extension, PATELLAR reflex. - L5: posterior thigh/LATERAL calf → DORSAL foot/great toe; motor = GREAT TOE DORSIFLEXION weakness (extensor hallucis longus, EHL — the most sensitive AND most specific motor test for L5) + foot eversion; NO classic reflex change ("L5 is the no-reflex root"). - S1: LATERAL foot; motor = PLANTAR FLEXION weakness (cannot stand on tiptoes); ACHILLES reflex diminished/absent. MNEMONIC: "S1 = Stand on tippy-toes (S-1)." Lateral foot + plantar flexion + Achilles loss = S1, every time. BOARD TRAP — L5 vs S1 (highest-yield root-localization trap): both can be "lateral leg" and both follow lifting injuries, so the SEPARATOR is the motor exam direction. S1 weakness = PLANTAR FLEXION (tiptoe motion) + Achilles reflex loss. L5 weakness = GREAT TOE DORSIFLEXION (EHL) with NO reflex change. These are opposite motor directions — never confuse them. BOARD TRAP — Posterolateral disc herniation compresses the root ONE LEVEL BELOW the disc (the TRAVERSING root, not the exiting root): the "exiting" root at a given level has already left the canal through its own foramen above that disc space by the time you're looking at the posterior disc; the "traversing" root (one level down) is the one still crossing behind the disc and gets clipped. - FORMULA: posterolateral disc level + 1 = compressed root. L4-L5 posterolateral herniation → compresses L5 (NOT L4, which has already exited via the L4-L5 foramen). L5-S1 posterolateral herniation → compresses S1. - This is called "the highest-yield trap on disc herniation questions" in the source — students reflexively match the disc level number to the root number (L4-L5 disc = "L4 root"), which is WRONG for posterolateral herniations. - A single standard posterolateral herniation compresses ONE root (the traversing root) — compressing two roots (e.g., "L4 and L5") typically requires a large CENTRAL/paracentral herniation occupying much of the canal, not a standard posterolateral one. - L3 exits at the L3-L4 foramen (one level above an L4-L5 disc) — anatomically cannot be affected by an L4-L5 herniation. STRAIGHT LEG RAISE (SLR) AND CROSSED SLR - Ipsilateral SLR positive (reproduces pain, classically 30-70°): SENSITIVE for disc herniation but not highly specific. 214 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - CROSSED SLR (raising the CONTRALATERAL/"good" leg reproduces pain in the AFFECTED leg): highly SPECIFIC for a LARGE, CENTRAL/MEDIAL disc herniation. Mechanism: raising the unaffected leg pulls the dural sac centrally, stretching the already-compressed root on the opposite side — this only happens when the disc is large/medial enough to tether both sides. - BOARD TRAP — crossed SLR differential: hip pathology causes IPSILATERAL pain correlating with the leg being loaded (crossed SLR is CONTRALATERAL — hip pathology can't explain pain in a stationary leg); SI joint dysfunction is provoked by joint-specific tests (FABER, Gaenslen's, compression/distraction), not by dural tension; facet pain is loaded by extension/rotation, not by straight-leg neural tension; piriformis syndrome causes IPSILATERAL pain with hip flexion + internal rotation of the AFFECTED leg — crossed SLR produces pain on the leg NOT being raised, which only a canal-occupying lesion (large disc) explains. ========================================================= === SECTION 7: SCOLIOSIS — COBB ANGLE, NAMING, THRESHOLDS, ADAM'S TEST ========================================================= === NAMING CONVENTION (named for the CONVEXITY, not the concavity) - Dextroscoliosis: curve CONVEX to the RIGHT ("dextro," "dexterous," "dextrose," "dexter" all relate to right-handedness). - Levoscoliosis: curve CONVEX to the LEFT. - BOARD TRAP: scoliosis is a CORONAL-plane deformity seen on AP films; do not confuse with kyphosis (sagittal, excess forward thoracic rounding, seen on LATERAL films) or lordosis (sagittal, inward lumbar curve, also a lateral-film finding) — these are different planes measured on different imaging views. A "scoliotic listhesis" is not a real diagnosis: listhesis = vertebral slippage, an unrelated pathology from lateral curvature. COBB ANGLE MEASUREMENT METHOD (step-by-step, tested explicitly) 1. Identify the most tilted vertebrae at the TOP and BOTTOM of the curve on an AP film. 2. Draw a line along the SUPERIOR endplate of the upper end vertebra, and a line along the INFERIOR endplate of the lower end vertebra. 3. Draw PERPENDICULARS to each of those endplate lines. 4. The angle where the perpendiculars intersect = the Cobb angle. - WHY perpendiculars (not direct endplate-line intersection): the two endplate lines often DIVERGE rather than converge on the film for large curves, making direct intersection impossible without extrapolating off the film; perpendiculars to those lines always converge at a measurable angle regardless of curve magnitude. 215 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - WHY NOT spinous processes as landmarks: vertebrae ROTATE in scoliosis, so spinous processes shift toward the CONCAVE side and no longer mark the true vertebral body center — endplates are the stable, rotation-independent reference. - WHY NOT the lateral view: lateral view captures sagittal deformities (kyphosis/lordosis); scoliosis (coronal lateral curvature) requires the AP view. - WHY NOT vertical midlines: not a validated/recognized Cobb method; introduces variability from vertebral body width/rotation. SEVERITY LADDER & MANAGEMENT - Mild: up to 20° → Observation. - Moderate: 21°-45° → Bracing. - Severe: >45-50° → Surgery discussion/threshold (surgery is discussed starting ~45° in growing patients — "reinforce the structure before permanent deformity sets in"; the page also lists ">50° = Surgery" on its severity ladder, so know BOTH numbers: 45° = surgical discussion cutoff in growing patients; 50° = the point cited for a "severe/surgery" bracket AND for organ-system respiratory compromise, below). BOARD ALERT — COMPLICATION THRESHOLDS (organ systems fail in this order) - >50° = RESPIRATORY compromise: thoracic cage deformity restricts lung expansion → restrictive lung disease. Lungs fail FIRST. - >75° = CARDIOVASCULAR compromise: severe rib cage deformity compresses pulmonary vasculature, raises right heart afterload → cor pulmonale (from chronic pulmonary hypertension). Heart fails SECOND, one tier later. - One-liner: "50 = lungs. 75 = heart. Lungs fail first." - BOARD TRAP: 45° (surgical discussion threshold) vs 50° (respiratory compromise threshold) vs 75° (cardiovascular/cor pulmonale threshold) are three DIFFERENT clinical milestones commonly mixed up on exams — know which number answers which question (surgery vs. lungs vs. heart). ADAM'S FORWARD BEND TEST - Patient bends forward with feet together (this specifically ISOLATES the rotational component of spinal curvature and removes the influence of leg length, since both legs bear equal load in forward bending — leg length discrepancy is instead assessed STANDING). - A prominent RIB HUMP on one side = SCOLIOSIS WITH VERTEBRAL ROTATION. Mechanism: as vertebrae rotate, the attached ribs are pushed POSTERIORLY on the convex side, creating a fixed, firm, bony prominence present on every exam (distinguishes from muscle spasm, which produces soft, variable, position-dependent asymmetry, not a persistent bony hump). - Threshold for imaging: Scoliometer reading >5-7 degrees warrants X-ray. 216 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - BOARD TRAP — rib hump differential: NOT leg length discrepancy (assessed standing, not in forward bending), NOT spondylolisthesis (produces a lumbar step-off from anterior slippage, not a thoracic rib hump — different region, different plane, different mechanism), NOT kyphosis (a sagittal-plane deformity seen from the side; a rib hump is a rotational, coronal/axial-plane finding). ========================================================= === SECTION 8: LEG LENGTH DISCREPANCY & THE SART RULE (TYPE I MECHANICS) ========================================================= === MECHANISM: a short leg drops the pelvis on that side → the lumbar spine compensates with a GROUP CURVE across multiple lumbar segments → this compensatory curve follows FRYETTE'S LAW I (Type I): in a neutral spine, sidebending and rotation occur to OPPOSITE sides. THE SART RULE: Sidebend AWAY from the short leg · Rotate TOWARD the short leg. - Short RIGHT leg → sidebend LEFT (away), rotate RIGHT (toward) → diagnosis: L1-L4, N S_L R_R (neutral, sidebent left, rotated right). This IS Type I (opposite-direction coupling). - Short LEFT leg → sidebend RIGHT (away), rotate LEFT (toward) → diagnosis: N S_R R_L. - TREATMENT: heel lift on the SHORT side — levels the sacral base and removes the compensatory curve. - BOARD TRAP: SART direction errors are the #1 tested mistake — sidebending must go AWAY from the short leg (not toward it), and rotation must go TOWARD the short leg (not away). Getting either direction backward, or coupling them in the SAME direction (that would be a Type II signature, not the Type I group curve expected from leg length discrepancy), are both classic wrong-answer patterns. There is NO "unpredictable" option — Fryette Law I makes this pattern fully predictable every time. ========================================================= === SECTION 9: PSOAS & LOW BACK PAIN ========================================================= === ANATOMY: psoas major originates from the lumbar TRANSVERSE PROCESSES and VERTEBRAL BODIES (T12-L5), crosses the pelvis, inserts on the LESSER TROCHANTER of the femur. CLINICAL EFFECT OF SPASM: pulls the lumbar spine into FLEXION and the hip into FLEXION → patient has difficulty standing upright, walks with a FORWARD LEAN, hip held in flexion and resists extension. 217 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN THOMAS TEST (flexion contracture detector) - Patient supine; examiner flexes ONE hip toward the chest (this eliminates lumbar lordosis/compensation). If the OPPOSITE thigh lifts off the table, the hip flexor (psoas) on that side is tight/in spasm — POSITIVE test. - BOARD TRAP — Thomas test muscle differential: a positive Thomas test means a HIP FLEXOR is pulling the limb into a flexion contracture — it must be a muscle that both crosses the hip joint AND flexes it. Piriformis (external rotator, not a flexor — would be tested with FADIR/internal rotation pain, not flexion contracture) is wrong. Gluteus maximus (hip EXTENSOR — would resist flexion, not cause lift-off) is wrong. Rectus femoris is a secondary contributor to hip flexion but the CLASSIC Thomas test association is iliopsoas, the primary hip flexor with the direct lumbar-spine-to-femur attachment. Quadratus lumborum acts on the trunk (sidebending/rib depression) and does NOT cross the hip joint at all, so it cannot create a hip flexion contracture. COUNTERSTRAIN FOR ANTERIOR PSOAS TENDER POINT (flexion-type tender point) - CORRECT position: SUPINE, flex BOTH hips to approximately 90 degrees, fine-tune with slight rotation TOWARD the tender point side. Hold ~90 seconds. This maximally SHORTENS the psoas. - WHY "both hips": flexing only one hip (or the contralateral hip, as in the Thomas test) does not achieve the same targeted psoas-shortening position used for counterstrain treatment. - WRONG options and why: extending the hip (from ANY patient position — supine, lateral, or prone) LENGTHENS the psoas, which is the opposite of counterstrain's shortening principle ("go TOWARD the pain/dysfunction, shorten the muscle"); sidebending away in prone addresses trunk muscles, not a hip flexor, and does not change psoas length meaningfully — the psoas responds to hip flexion ANGLE, not trunk sidebend. - Cardinal rule of counterstrain applies here identically to piriformis counterstrain (see 13_piriformis.txt): move TOWARD the dysfunction/shorten the muscle, hold ~90 seconds, release slowly. ========================================================= === SECTION 10: FRYETTE'S LAWS — TYPE I VS TYPE II SOMATIC DYSFUNCTION ========================================================= === TYPE I (Fryette Law I) — GROUP, NEUTRAL, OPPOSITE - Multiple vertebrae (group curve), in the NEUTRAL range (no flexion/extension component), sidebending and rotation to OPPOSITE sides. - Example: L1-L4, N S_L R_R. 218 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Mechanism example: the short-leg compensatory curve (SART rule, Section 8) is a textbook Type I pattern. TYPE II (Fryette Law II) — SINGLE SEGMENT, NON-NEUTRAL, SAME SIDE - A SINGLE vertebra, FLEXED or EXTENDED (non-neutral), with sidebending and rotation to the SAME side. - Example: L3 flexed, rotated right, sidebent right = L3 F R_R S_R. - MNEMONIC: "I disagree, II agree" — Type I has sidebend/rotation DISAGREEING (opposite directions); Type II has them AGREEING (same direction). - BOARD TRAP: a single-segment finding automatically disqualifies Type I (which requires MULTIPLE vertebrae/group curve) — "you cannot have a group curve with one vertebra, the same way you cannot have a marching band with one musician." Similarly, ANY flexion or extension component disqualifies "neutral"/Type I classification — neutral and flexed/extended are mutually exclusive. - "Non-physiologic" dysfunction (sometimes called Fryette Law III) = restriction in ALL THREE planes simultaneously, typically from trauma/pathology — a separate classification, not what's being tested when a single segment shows a clean same-direction coupling pattern (that's Type II). DIAGNOSING TYPE II FROM POSITIONAL TESTING (prone vs. seated/flexed) - The TRANSVERSE PROCESS goes POSTERIOR on the side the vertebra is ROTATING TOWARD — e.g., right TP posterior = rotated RIGHT (R_R), every time. - "Position that FIXES/resolves the asymmetry = OPPOSITE of where the segment is STUCK." If asymmetry RESOLVES when the patient moves into FLEXION (e.g., seated), the segment was stuck in EXTENSION (not flexion) — because moving a flexion-restricted segment further into flexion would make asymmetry WORSE, not better; only moving away from where it's "stuck" corrects it. - Worked example: right L5 TP posterior (prone), asymmetry resolves when SEATED/FLEXED → diagnosis = L5, EXTENDED, ROTATED RIGHT, SIDEBENT RIGHT (L5 E R_R S_R), Type II. (Right TP posterior fixes rotation = right; resolves in flexion fixes position = extension, since flexion is the "cure" and E is the "disease.") - BOARD TRAP: getting the position component backward (assuming "resolves in flexion" means "stuck in flexion") is the single most common wrong-answer trap on positional diagnosis questions — remember the FIX is always the OPPOSITE of the dysfunction. MUSCLE ENERGY TECHNIQUE (MET) — GENERAL RULE FOR BOTH TYPES - MET positions the segment AT THE RESTRICTIVE BARRIER, which is OPPOSITE the direction of the dysfunction (never move further INTO the dysfunction — "like tightening a bolt that is already overtightened"). 219 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - For a Type I dysfunction (e.g., N S_L R_R): the barrier is the opposite of BOTH components together — position SB RIGHT, rotate LEFT. Patient pushes back isometrically against the physician's resistance (in the direction of the dysfunction), then relaxes; physician takes up new slack. Repeat 3-5 times. BOTH restricted planes (sidebend AND rotation) must be engaged simultaneously — treating only one and leaving the other untreated is "like fixing one of two broken bolts and calling the joint repaired." Because Type I is neutral, do NOT add flexion or extension — irrelevant to a neutral dysfunction. - For a Type II dysfunction (e.g., L3 F R_R S_R): the barrier reverses ALL THREE components — position into EXTENSION, sidebend LEFT, rotate LEFT (reverse F→E, reverse S_R→S_L, reverse R_R→R_L). All three restricted directions must be engaged together, unlike Type I's two; leaving any one of the three in the "stuck" direction (e.g., staying in flexion, or only correcting two of three components) means that barrier is never engaged and treatment is incomplete ("repairing two out of three broken legs on a stool"). ========================================================= === SECTION 11: SACRAL MECHANICS — L5 TORSION NAMING & SACRAL TORSIONS ========================================================= === L5 DYSFUNCTION NAMING CONVENTION (named by the sacral torsion it creates) - FORWARD torsions (associated with NEUTRAL L5): named axis and rotation go to the SAME side — "L on L" or "R on R." Sacrum rotates FORWARD on its oblique axis. Mnemonic: "Same = Forward = Neutral L5 — the letters match, the sacrum goes forward, L5 is happy (neutral)." - BACKWARD torsions (associated with NON-NEUTRAL L5): named axis and rotation go to OPPOSITE sides — "L on R" or "R on L." Sacrum rotates BACKWARD on its oblique axis. Mnemonic: "Opposite = Backward = Non-Neutral L5 — the letters cross, the sacrum goes backward, L5 is dysfunctional (non-neutral)." Step 1 — determine rotation side from sulcus/ILA asymmetry: a DEEP (posterior) sulcus on one side + a POSTERIOR inferior lateral angle (ILA) on the OPPOSITE side = the classic OPPOSITE-SIDED asymmetric pattern that defines a torsion (you cannot have torsion without this cross-sided asymmetry). The rotation direction is named for the side of the DEEP sulcus (deep LEFT sulcus = sacrum rotated LEFT; deep RIGHT sulcus = rotated RIGHT). Step 2 — determine forward vs. backward using the SPHINX TEST (prone extension): - Asymmetry DEEPENS/WORSENS with sphinx (extension) = FORWARD torsion (same-letter naming) — the dysfunction "loves" extension in the sense that extension makes the sulcus finding more pronounced. - Asymmetry IMPROVES with sphinx = BACKWARD torsion (crossed-letter naming). - One-liner: "Same letters = forward. Crossed letters = backward. Sphinx deepens = forward, sphinx improves = backward." 220 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN Step 3 — name the torsion "[rotation]-on-[axis]": e.g., deep LEFT sulcus + posterior RIGHT ILA + sphinx DEEPENS → rotation LEFT, worsens with sphinx = FORWARD = same letters = LEFT-on-LEFT (L-on-L) forward torsion. Deep RIGHT sulcus + posterior LEFT ILA + sphinx IMPROVES → rotation RIGHT, improves with sphinx = BACKWARD = crossed letters = RIGHT-on-LEFT (R-on-L) backward torsion. - BOARD TRAP: swapping either the sulcus side (which flips rotation direction) OR the sphinx response (which flips forward vs. backward) flips the ENTIRE torsion name — exam distractors routinely get exactly ONE of the two variables right and the other wrong (e.g., correct rotation side but wrong forward/backward, or vice versa) — check BOTH independently. UNILATERAL SACRAL DYSFUNCTION (flexion or extension) — the key alternative to torsion: - Distinguishing feature vs. torsion: unilateral dysfunction shows SAME-SIDED findings (both the sulcus finding AND the ILA finding on the SAME side) and — critically — the findings DO NOT CHANGE with positional testing (sphinx, seated flexion). Torsions ALWAYS show opposite-sided findings AND change with sphinx; if EITHER of those two torsion-defining criteria is absent, it is NOT a torsion. - Unilateral sacral EXTENSION (nutation held on one side): SHALLOW (anterior) sulcus + POSTERIOR/INFERIOR ILA, same side. No change with sphinx or seated flexion. - Unilateral sacral FLEXION (counternutation held on one side) — the mirror image: DEEP (posterior) sulcus + ANTERIOR ILA, same side. - One-liner: "Same side + no sphinx change = unilateral. Extension: shallow sulcus + posterior ILA. Flexion: deep sulcus + anterior ILA." - BOARD TRAP: same-sided findings automatically rule out ALL torsion diagnoses (forward AND backward, either side) regardless of which side is affected — "the side of the diagnosis is irrelevant when the fundamental pattern [same-side, no positional change] rules out torsion entirely." ========================================================= === SECTION 12: OMT TREATMENT APPROACH — SUMMARY DECISION LOGIC ========================================================= === - Diagnose FIRST by classification (Type I vs Type II vs sacral torsion vs unilateral sacral dysfunction vs psoas/muscular) using the positional/provocation findings above — treatment technique follows directly from correct classification. - MET (direct technique) universal rule: position to the RESTRICTIVE BARRIER (opposite the dysfunction, i.e., opposite ALL restricted components: 2 for Type I [sidebend+rotation], 3 for Type II [flexion/extension+sidebend+rotation]); patient contracts isometrically TOWARD the dysfunction/against resistance (typically 3-5 seconds); relax; take up new slack; repeat 3-5 221 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN cycles. - Counterstrain (indirect technique) universal rule: position AWAY from the barrier / TOWARD the dysfunction to SHORTEN the affected muscle and its tender point (e.g., psoas anterior tender point = flex both hips ~90°); hold ~90 seconds; return to neutral SLOWLY. - Heel lift: the specific structural treatment for a leg-length-discrepancy-driven Type I group curve — placed on the SHORT side. - OMT is appropriate for mechanical/positional dysfunction (facet-pattern pain, Type I/II somatic dysfunction, sacral torsions, psoas spasm, short-leg compensatory curves). OMT is NOT the management for red-flag/emergent presentations — cauda equina syndrome requires urgent MRI + emergent surgical decompression (within 48 hours), not manipulation; inflammatory disease (ankylosing spondylitis) requires rheumatologic workup/management, not OMT as primary treatment, though adjunctive OMT for mobility may have a role once red flags/inflammatory activity are addressed. Always screen for red flags (progressive neuro deficit, bowel/bladder involvement, saddle anesthesia, fracture, infection/malignancy features, inflammatory pattern) before treating a "mechanical" pattern with manipulation — a plausible mechanical/structural finding never overrides a red flag (same organizing principle as the psoas/iliopsoas notes file). ========================================================= === QUIZ / VIGNETTE HIGHLIGHTS (28 vignettes, condensed) ========================================================= === 1. 51M, known lumbar spinal stenosis, legs hurt walking but not biking, MRI: facet hypertrophy causing central canal narrowing L3-L5 → why is cycling painless? = flexion (cycling posture) mechanically OPENS the canal (separates laminae, stretches ligamentum flavum); extension (standing/walking) narrows it. Traps: core strengthening (too slow an effect for immediate relief), reduced disc pressure (seated flexion actually INCREASES disc pressure), increased blood flow (walking is equally aerobic yet still hurts, so flow isn't the differentiator), venous congestion (real but minor/secondary mechanism). 2. 45F, right LBP, prone exam right L5 TP posterior, asymmetry resolves when seated/flexed → diagnosis = L5 E R_R S_R (Type II). Right TP posterior = rotated right; resolves in flexion = segment was stuck in EXTENSION (fix = opposite of dysfunction). 3. 55M, LBP worst end of day/improves with rest, no morning stiffness, worse with extension/rotation, X-ray facet hypertrophy L4-L5 → most likely pain generator = FACET ARTHROPATHY. Disc pain would be worse with flexion/sitting (opposite pattern); no bilateral leg symptoms rules out stenosis; imaging shows bony facet change (not myofascial); provocation is spinal (not SI-joint-specific tests). 4. 47F, right hip pain, forward-lean gait, cannot fully extend right hip, tender/spasmed right psoas, treating with counterstrain → correct anterior psoas tender point position = SUPINE, flex BOTH hips ~90°, fine-tune with slight rotation TOWARD tender point, hold 90 sec 222 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN (shortens the psoas; any hip extension in any body position LENGTHENS it = wrong direction). 5. 37F, Type I lumbar dysfunction L1-L4 N S_L R_R, planning MET → position = SIDEBEND RIGHT, ROTATE LEFT (the barrier = opposite of BOTH dysfunction components together; moving into S_L or R_R deepens the dysfunction instead of engaging the barrier; both planes must be engaged simultaneously, not just one). 6. 50M, structural exam: L3 flexed, rotated right, sidebent right, single segment → classification = TYPE II (Fryette Law II): single vertebra + non-neutral (flexed) + same-direction coupling. Not Type I (requires group + neutral + opposite coupling), not "neutral dysfunction" (flexed excludes neutral), not group curve (single segment), not non-physiologic/Law III (that's all-plane restriction from trauma). 7. 12F, Adam's forward bend test, prominent right thoracic rib hump → indicates SCOLIOSIS WITH VERTEBRAL ROTATION (ribs attached to rotating vertebrae get pushed posteriorly on the convex side). Not leg length (assessed standing, not in forward bend), not muscle spasm (would be soft/variable, not a fixed bony hump), not spondylolisthesis (produces a lumbar step-off, different region/mechanism), not kyphosis (sagittal-plane finding, different plane). 8. 58F, right SLR positive at 40°, raising the LEFT leg reproduces pain in the RIGHT leg → CROSSED SLR = highly specific for a LARGE central/medial disc herniation (raising the "good" leg pulls the dural sac centrally, stretching the compressed contralateral root). Rules out hip pathology (would be ipsilateral to the leg loaded), SI joint (needs joint-specific provocation tests, not dural tension), facet syndrome (loaded by extension/rotation, not straight-leg tension), piriformis (causes ipsilateral pain on the leg raised, not contralateral). 9. 35M, left leg pain/numbness buttock-to-lateral foot, weak plantar flexion, diminished Achilles reflex, MRI posterolateral L5-S1 disc herniation → compressed root = S1 (lateral foot + plantar flexion weakness + Achilles loss = the S1 fingerprint). Not L3 (anterior thigh/patellar reflex), not S2 (rarely isolated by disc disease), not L5 (dorsal foot/great toe, NO reflex, dorsiflexion not plantar flexion), not L4 (medial leg/dorsiflexion/patellar reflex). 10. 28M, acute LBP + bilateral leg weakness + saddle anesthesia + urinary retention → most appropriate next step = URGENT MRI lumbar spine → then emergent surgical decompression within 48 hours (cauda equina syndrome). NOT NSAIDs+f/u (this is a surgical emergency, not mechanical pain), not CT myelogram (invasive fallback for MRI-contraindicated patients only), not EMG (assesses chronic damage, too slow), not X-ray (cannot show the soft-tissue compressive lesion). 11. 64M, deep LEFT sacral sulcus + posterior RIGHT ILA, left sulcus deepens with sphinx (prone extension) → sacral torsion diagnosis = LEFT-ON-LEFT (L-on-L) FORWARD torsion. Deep left sulcus = rotated left; deepens with sphinx = worsens in extension = forward (same letters). Rules out bilateral flexion (would be symmetric, no asymmetry), R-on-R forward (mirror image — wrong side), R-on-L and L-on-R backward (backward requires IMPROVEMENT with sphinx, not deepening). 223 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN 12. 19M, chronic LBP + morning stiffness IMPROVING with activity, HLA-B27 positive, X-ray bilateral SI joint sclerosis → most likely diagnosis = ANKYLOSING SPONDYLITIS. Not DDD (mechanical, worsens with activity, older patients), not psoriatic arthritis (asymmetric SI involvement + skin/nail findings needed), not spondylolysis (mechanical pars fracture, no SI/HLA link), not reactive arthritis (needs a preceding GI/GU infection + urethritis/conjunctivitis triad — absent here). 13. 63M construction worker, chronic LBP, X-ray osteophytes anterior vertebral margins + disc space narrowing L4-L5/L5-S1, NO pars defects or slippage → diagnosis = SPONDYLOSIS (degenerative arthritis: osteophytes + disc narrowing + chronic pain in an older patient). Not AS (wrong age, no SI/inflammatory findings), not spondylolisthesis (stem explicitly says "no slippage"), not spondylolysis (stem explicitly says "no pars defects"), not DISH (DISH preserves disc spaces — this patient has narrowing). 14. 14F, school screening, Cobb angle 58°, occasional dyspnea on exertion → threshold for RESPIRATORY compromise = GREATER THAN 50 DEGREES (thoracic cage deformity restricts lung expansion → restrictive lung disease). >75° is the NEXT threshold (cardiovascular/cor pulmonale — wrong organ system for this question); >45° is the surgical-discussion threshold, not an organ-system threshold; >20°/>30° are the observation/bracing thresholds, far too mild for organ compromise. 15. 40F, acute LBP after lifting, pain to right posterior thigh/lateral calf, SLR positive at 35°, weak great toe dorsiflexion → nerve root = L5 (posterior thigh/lateral calf distribution + EHL/great-toe-dorsiflexion weakness, the most sensitive motor test for L5; NO reflex change expected). Not S1 (S1 weakness is PLANTAR flexion, opposite direction), not L3 (anterior thigh territory), not L4 (shares dorsiflexion but not great-toe-specific weakness), not S2 (disc compression of S2 alone is rare and looks different). 16. 54M, left leg numbness, MRI posterolateral disc herniation L4-L5 → compressed root = L5 (the TRAVERSING root at this level — L4 has already exited via its own L4-L5 foramen by the time the disc bulges posteriorly). Formula: posterolateral disc level + 1 = compressed root. Not L4 (already exited — classic trap), not "L4 and L5" (requires a large central herniation, not a standard posterolateral one), not L3 (exits one level above, anatomically unreachable), not S1 (that's the traversing root for L5-S1, one level too low). 17. 44M construction worker, twisting injury, L3 F R_R S_R (Type II), planning MET → position for isometric contraction = EXTEND + SIDEBEND LEFT + ROTATE LEFT (reverse ALL THREE components of the dysfunction). Traps: flexing further (wrong — segment is stuck in flexion, needs extension), staying in neutral (ignores the Type II flexion component entirely), moving into S_R/R_R (deepens the existing dysfunction instead of engaging the barrier), correcting only one of the three components (extension alone without correcting rotation, or vice versa — all three barriers must be engaged together). 18. 60F, AP X-ray: lateral curvature convex to the LEFT of the thoracolumbar spine → curvature name = LEVOSCOLIOSIS (named for direction of convexity: levo = left). Not kyphosis/lordosis (sagittal-plane, lateral-film findings, wrong plane entirely), not "scoliotic listhesis" (listhesis = vertebral slippage, not described here), not dextroscoliosis (that's convex RIGHT — opposite side). 224 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN 19. 32F, chronic LBP worse with sitting/bending forward, better standing, MRI posterior disc bulge L4-L5 → why does flexion worsen pain? = flexion shifts the nucleus pulposus POSTERIORLY and INCREASES intradiscal pressure, pushing the nucleus further into the posterior herniation. Not canal narrowing (flexion actually OPENS the canal — this is the stenosis mechanism, opposite condition), not primarily PLL stretch (real but secondary/minor contributor), not facet compression (extension loads facets, not flexion — and flexion actually unloads them), not anterior vertebral body compression (a different, bony/fracture mechanism, irrelevant to a posterior disc bulge). 20. 43M, short RIGHT leg, standing exam confirms right low iliac crest, compensatory lumbar curve → SART diagnosis = SIDEBEND LEFT (away), ROTATE RIGHT (toward) — Type I opposite-direction coupling; N S_L R_R. Traps: no predictable pattern (Fryette Law I makes this fully predictable), SB right/rotate left (sidebend direction backward), SB left/rotate left (rotation direction backward — must go TOWARD the short side), SB right/rotate right (same-direction coupling = Type II signature, wrong for a compensatory group curve). 21. 42M, LBP worse with hyperextension, tenderness lower lumbar spine, oblique X-ray shows pars interarticularis defect, NO anterior slippage on lateral → diagnosis = SPONDYLOLYSIS (pars defect on a young hyperextension-athlete pattern; "no slippage" means it has NOT progressed to spondylolisthesis — "the crack is there but the vertebra hasn't moved forward yet"). Not HNP (bony vs. soft-tissue finding, wrong modality), not spondylosis (degeneration of elderly patients, wrong age/mechanism), not AS (SI-joint/HLA-B27 inflammatory disease, unrelated mechanism), not spondylolisthesis (stem explicitly rules out slippage). 22. 62M vignette used to teach a med student measuring Cobb angle, endplates at top/bottom of curve identified → correct next step = draw PERPENDICULARS from each endplate line and measure their intersection angle. Not lateral view (wrong plane — scoliosis needs AP), not measuring the endplate angle directly (lines may diverge and never intersect on the film for large curves), not vertical midlines (not a validated method), not spinous process lines (shift with vertebral rotation, unreliable landmark). 23. 36F office worker, chronic LBP, Thomas test positive on the right (left hip flexed → right thigh lifts off table) → muscle in spasm = RIGHT ILIOPSOAS (Thomas test specifically detects a hip-flexion contracture; flexing the opposite hip eliminates lumbar lordosis compensation, revealing the tight psoas pulling the tested thigh into flexion). Not piriformis (external rotator, not a flexor — different test entirely, FADIR), not gluteus maximus (a hip EXTENSOR — would resist, not cause, flexion), not rectus femoris (secondary contributor; the classic Thomas-test association is iliopsoas), not quadratus lumborum (trunk muscle, doesn't cross the hip joint). 24. 40M, sacral exam deep RIGHT sacral sulcus + posterior LEFT ILA, sphinx test IMPROVES the asymmetry → diagnosis = RIGHT-ON-LEFT (R-on-L) BACKWARD torsion. Deep right sulcus = rotated right; improves with sphinx = backward (crossed letters). Traps: L-on-R backward (rotation side wrong — deep sulcus is right, not left), R-on-R forward (rotation correct but sphinx IMPROVING means backward, not forward), "unilateral extension" (unilateral dysfunction would show NO change with sphinx — this case clearly changes, so 225 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN it's a torsion), L-on-L forward (both rotation side AND forward/backward wrong). 25. 48F, right buttock pain, prone exam: right sacral sulcus SHALLOW (anterior) + right ILA posterior/inferior, findings do NOT change with sphinx or seated flexion → diagnosis = RIGHT UNILATERAL SACRAL EXTENSION (same-sided findings + no positional change = unilateral, not torsion; shallow/anterior sulcus + posterior ILA on the SAME side = the extension pattern). Traps: L-on-L or R-on-R forward torsion (any torsion requires OPPOSITE-sided findings AND sphinx responsiveness — both absent here, ruling out ALL torsions regardless of side), R-on-L backward torsion (same reasoning — no opposite-sidedness, no sphinx change), right unilateral FLEXION (the mirror-image pattern — flexion = DEEP sulcus + ANTERIOR ILA, opposite of what's found here). 26. 48M football lineman, bilateral LBP to buttocks, palpable step-off L5-S1, lateral X-ray shows 25% anterior displacement of L5 on S1 → Meyerding grade = GRADE I (0-25% = Grade I; boundary values belong to the LOWER grade, so exactly 25% is still Grade I, not the floor of Grade II). Grade II = >25-50%, Grade III = >50-75%, Grade IV = >75-100%, Grade V = >100% (spondyloptosis, complete dislocation). 27. 41M, short LEFT leg, standing exam confirms left low iliac crest, compensatory lumbar curve → SART/Type I diagnosis = N S_R R_L (sidebend RIGHT [away from short left leg], rotate LEFT [toward short left leg] — opposite-direction Type I coupling). Traps: N S_L R_R (this is the pattern for a short RIGHT leg — sides flipped), E S_R R_R (wrong plane [extended, not neutral] AND same-direction Type II coupling, both wrong for a short-leg compensatory curve), N S_R R_R (sidebend correct, rotation direction wrong — must go toward, not away), N S_L R_L (same-direction coupling = Type II signature, and sidebend direction also wrong). 28. 55M, bilateral leg pain/numbness worse with walking/standing, better with sitting/leaning forward, symptom-free on a stationary bike, calls it "neurogenic claudication" → diagnosis = LUMBAR SPINAL STENOSIS. Neurogenic claudication = bilateral symptoms, worse with extension (standing/walking narrows the canal), better with flexion (opens the canal), pain-free biking; "shopping cart sign" is pathognomonic. Not piriformis (unilateral, position/sitting-specific, cannot cause bilateral claudication), not cauda equina (an ACUTE emergency with saddle anesthesia/urinary retention/bilateral weakness — this is chronic and positional with no red flags), not PAD/vascular claudication (pain is position-INDEPENDENT and would also occur with biking, since it's a blood-flow-demand problem, not a canal-mechanics problem), not disc herniation (usually unilateral dermatomal radiculopathy, worse with FLEXION — opposite of this patient's flexion-relief pattern). ========================================================= === MEMORY HOOKS ========================================================= === 226 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - "-lysis = fracture (pars, young athlete, Scotty Dog collar). -listhesis = slip (anterior vertebral slippage, graded by Meyerding). -osis = degeneration (osteophytes, disc narrowing, elderly)." - Meyerding grading: each 25-point window = one grade (I: 0-25%, II: >25-50%, III: >50-75%, IV: >75-100%, V/spondyloptosis: >100%); the boundary value belongs to the LOWER grade. - Scotty Dog: neck = pars interarticularis = the fracture site in spondylolysis. - Dextro = right, Levo = left — always named for the convexity (bulge), never the concavity. - Cobb angle thresholds: 20° observation / 21-45° bracing / 45° surgery-discussion cutoff / >50° respiratory compromise / >75° cardiovascular compromise (cor pulmonale). "50 = lungs, 75 = heart — lungs fail first." - Adam's forward bend test isolates ROTATION (removes leg-length influence); a rib hump = ribs following rotated vertebrae on the convex side. SART = Sidebend AWAY, Rotate TOWARD the short leg — this IS Type I (opposite-direction) mechanics; treat with a heel lift on the SHORT side. - Fryette: Type I = group + neutral + opposite (sidebend ≠ rotation direction); Type II = single segment + non-neutral (F/E) + same direction (sidebend = rotation direction). "I disagree, II agree." - MET rule (both types): position AT the barrier = OPPOSITE the dysfunction in every restricted plane; patient pushes back isometrically; take up new slack; repeat 3-5x. Never move further into the dysfunction. - Counterstrain rule: move TOWARD the dysfunction / SHORTEN the muscle to relieve the tender point; hold ~90 sec; release slowly. Anterior psoas tender point = supine, flex both hips ~90°. - Thomas test positive = tight hip FLEXOR (classically iliopsoas) — opposite hip flexed to cancel lumbar lordosis, tested thigh lifts if flexor is tight. Sacral torsion: SAME letters (L-on-L, R-on-R) = FORWARD, sphinx DEEPENS the asymmetry. CROSSED letters (L-on-R, R-on-L) = BACKWARD, sphinx IMPROVES the asymmetry. Rotation direction is named for the side of the DEEP sulcus. - Unilateral sacral dysfunction (not a torsion): SAME-sided sulcus + ILA findings, NO change with sphinx/flexion. Extension = shallow sulcus + posterior ILA. Flexion = deep sulcus + anterior ILA. - Facet vs Disc: "Extension + rotation = facet. Flexion + sitting = disc." Opposite provocation patterns; sitting INCREASES disc pressure (Nachemson), it does not relieve it. - Nerve roots: L3 = anterior thigh/patellar reflex. L4 = medial leg/dorsiflexion/patellar reflex. L5 = dorsal foot/great toe DORSIFLEXION weakness (EHL), NO reflex. S1 = lateral foot/PLANTAR flexion weakness/Achilles reflex loss. "S1 = Stand on tippy-toes." 227 OMM / OMT BOARD REVIEW PART 8 — INTEGRATIVE REVIEW: SPECIAL TESTS & LOW BACK PAIN - Posterolateral disc herniation compresses the TRAVERSING root = disc level + 1 (L4-L5 disc → L5 root, NOT L4). - Crossed SLR = highly SPECIFIC for a large/central/medial disc herniation (raising the good leg stretches the bad-side root via central dural tension). - Cauda equina = saddle anesthesia + urinary retention + bilateral leg weakness → URGENT MRI + surgical decompression within 48 HOURS. This is the single highest-stakes red flag on the entire page. - Ankylosing spondylitis = young male + HLA-B27 + morning stiffness IMPROVING with activity + bilateral SI sclerosis. Inflammatory back pain improves with activity; mechanical back pain worsens with activity — this direction-of-change is the master discriminator between red-flag inflammatory disease and ordinary mechanical LBP. - Neurogenic (stenosis) vs vascular (PAD) claudication: neurogenic = bilateral, relieved by flexion/sitting, pain-free biking, "shopping cart sign." Vascular = position-independent, hurts with ANY exertion including biking, relieved only by rest. Universal exam discipline (applies across every vignette on this page): the objective/positional/imaging finding is always the discriminator — pick the single answer that explains the WHOLE presentation, and always screen for red flags before committing to a mechanical/OMT diagnosis. 228
0
advertisement
Download
advertisement
Add this document to collection(s)
You can add this document to your study collection(s)
Sign in Available only to authorized usersAdd this document to saved
You can add this document to your saved list
Sign in Available only to authorized users