Head and Neck Orthopedic Assessment III – Head, Spine, and Trunk with Lab PET 5609C Clinical Anatomy Clinical Anatomy Clinical Anatomy Brain: Cerebrum Largest section of brain (most anterior and superior region of CNS) Formed by 2 hemispheres: Longitudinal fissure – separates 2 sides Right and Left Hemisphere: Frontal lobe Parietal lobe Temporal lobe Occipital lobe Clinical Anatomy Clinical Anatomy Brain: Cerebrum Functions: Temperature Touch Pain Pressure Proprioception Special senses: Visual Auditory Olfactory and taste Cognition: Motor function Sensory information: Functions (cont.) Spatial relationships Behavior Memory Association Communication: Right hemisphere → controls left side of body Left hemisphere → controls right side of body Clinical Anatomy Brain: Cerebellum Quick processor of incoming/outgoing information: Integrates sensory perception, coordination and motor control: Cerebellum → linked to cerebral motor cortex (sends info to muscles) and spinocerebellar tract (proprioceptive feedback) Constant feedback on body position → fine tunes motor movements Key: Maintains BALANCE and COORDINATION Clinical Anatomy Clinical Anatomy Brain: Diencephalon Processing center for conscious and unconscious brain input Parts: Thalamus Hypothalamus Epithalamus Clinical Anatomy Brain: Thalamus Functions: Translates information (inputs) for cerebral cortex Processes and relays sensory information Helps regulate states/levels of sleep and consciousness Hypothalamic Regulation Posterior Pituitary Effect Neurosecratory Neuron Vasopressin (ADH) Water Retention Neurosecratory Neuron Oxytocin Milk ejection (mammary gland) Hypothalamic Regulation Anterior Pituitary Effect Thyrotropin Releasing Hormone Thyrotropin Involved Thyroxin from Thyroid Gland Corticotropin Releasing Hormone Adrenocorticotrophic Hormone Cortisol Release (adrenal gland) Growth-Hormone Releasing Hormone GH Whole body growth Gonadotropin Releasing Hormone FSH, LH Reproductive function Prolactin Releasing Hormones Prolactin Milk production MSH Releasing Factor Melanocyte Stimulating Hormone Skin pigments Clinical Anatomy Clinical Anatomy Brain: Hypothalamus Control of Hydration: Supraoptic nuclei and Paraventricular nuclei (Hypothalamus) What Happens? Hydration Level too LOW Osmoreceptors in blood detect increased concentration of salt in blood Hypothalamus stimulated – neurosecratory hormones Vasopressin released from Posterior Pituitary ADH causes kidneys to retain water Level of water increases in the body Clinical Anatomy Brain: Brain Stem Lower part of the brain (continuous with spinal cord) Medulla Oblongata Pons Functions: Main motor and sensory innervation to face and neck Cranial nerves Regulation of cardiac and respiratory function (medulla) Relays information to and from the CNS Pons: Link between cerebellum to brain stem and spinal cord Clinical Anatomy Brain: Meninges 3 connective tissue layers which protect the CNS Pia mater: Supports blood vessels Contains cerebrospinal fluid Innermost layer (outer “skin” of brain) Dura Mater: Outermost layer Serves as periosteum for skull’s inner layer Arachnoid Mater: Middle layer Subdural space – area between dura mater and arachnoid mater Subarachnoid space – beneath the arachnoid Contains cerebrospinal fluid Clinical Anatomy Clinical Anatomy Cerebrospinal Fluid: Clear, colorless liquid that bathes the brain and spinal cord (circulates within subarachnoid space) Functions: Cushions the brain within the skull Shock absorber for the CNS Circulates nutrients and chemicals filtered from the blood and removes waste products from the brain Clinical Anatomy Brain blood demand: 20% of body’s O2 uptake at rest ↑ 10 Celsius, brains demand ↑ 7% Supplying vessels: Vertebral arteries Carotid arteries: Internal External Circle of Willis Clinical Evaluation Key Points: All unconscious athletes must be managed as if a fracture or dislocation of the cervical spine exists until the presence of these injuries can be definitively ruled out Ideally, 2 responders are available to evaluate: In-line stabilization and immobilization of athlete’s head Initial evaluation: Palpation Sensory and motor tests Clinical Evaluation Clinical Evaluation Initial Evaluation: Assess ABC’s: (airways, breathing, circulation) Moving, speaking athlete → ABC’s present Still suspect cervical spine injury (until ruled out) Level of Consciousness: Communicate with athlete (verbal) Unresponsive athlete: Apply painful stimulus: Lunula of fingernail Pressure to sternum Clinical Evaluation Initial Evaluation: Primary Survey: Look, listen, feel for breathing Absent breathing → modified jaw thrust to open airway Absent pulse → CPR Initiate EMS! Secondary Survey: Bleeding Possible fractures, dislocations Clinical Evaluation History: Location of symptoms: Signs and Symptoms Brain Amnesia Confusion and Disorientation Irritability and Uncoordination Cervical pain or muscle spasm: Area Pain Numbness Burning Head pain: Headaches Dizziness Headache Ocular Blurred vision and Photophobia Nystagmus Ears Tinnitus Dizziness Stomach Nausea Vomiting Systemic Unusually fatigued Clinical Evaluation Mechanism of Injury: Head Coup Injury: Stationary skull is hit by object traveling at high velocity (i.e. hit in head with baseball) Trauma → side of head where contact occurred Contrecoup Injury: Skull is moving at high velocity and is suddenly stopped (i.e. falling and hitting head on the ground) Brain strikes the skull on side opposite of the impact Clinical Evaluation Clinical Evaluation Clinical Evaluation Mechanism of Injury: Head Repeated subconcussive forces: Repeated trauma: Boxing Heading in soccer Rotational or shear forces: Twisting Acceleration and deceleration Clinical Evaluation Mechanism of Injury: Cervical spine Most forces → dissipated by cervical musculature and intervertebral discs Flexion, extension, lateral bending, rotation Flexion: Removes natural lordotic curvature (30 degrees) Forces directed to cervical vertebrae Axial load → through vertical axis of vertebral column Catastrophic injuries Clinical Evaluation Clinical Evaluation Clinical Evaluation History: Loss of consciousness: Record athlete’s initial responses: “Do you remember being hit?” History of concussion: Recent concussions → increased risk “Seeing stars” “Blacking out” Second impact syndrome Complaints of weakness: Fatigue Muscular weakness: More serious: Trauma to brain, spinal cord, spinal nerve roots Clinical Evaluation Inspection: Bony Structures Position of head: Cervical vertebrae: Head should be upright in all planes Laterally flexed and rotated head → possible cervical vertebrae dislocation View athlete from behind (positioning of spinous processes) Mastoid process: Battle’s sign → ecchymosis over mastoid process Basilar skull fracture Skull and scalp: Bleeding, swelling, deformity Clinical Evaluation Inspection: Eyes General: Nystagmus: Dazed, distant stare may indicate mental confusion Involuntary cyclical movement of the eyes Pupil size: Unilateral dilation (pressure on cranial nerve III) Note: Anisocoria (normal unequal pupil size) Pupil reaction to light Clinical Evaluation Inspection: Nose and Ears Ears: Nose: Bleeding and/or cerebrospinal fluid Skull fracture Bleeding Nose fracture or skull fracture Nose/eyes: Raccoon eyes → skull or nasal fracture Clinical Evaluation Palpation: Bony Structures Palpation: Soft Tissue Spinous Processes: Patient seated, leaning slightly forward C7 and ↑ Transverse Processes Skull: Occipital and temporal Sphenoid and zygomatic Parietal and frontal Musculature: Trapezius SCM Throat Clinical Evaluation Special Test: Halo Test Patient position: Examiner position: Fold a piece of sterile gauze into a triangle Using the point of the gauze, collect a sample of the fluid leaking from the ear or nose (allow it to be absorbed) Positive test: At patient’s side Procedure: Lying or seated Pale yellow “halo” will form on the gauze Implications: Cerebrospinal fluid leakage Clinical Evaluation Functional Testing: Memory Retrograde amnsesia: Inability to recall events before injury Anterograde amnesia: Inability to recall events after injury Fading memory → progressive deterioration of cerebral function ATHLETE POSITION: On-field: athlete’s current position Sideline: standing, seated EXAMINER POSITION: In a position able to hear athlete’s responses PROCEDURE: Ask patient series of questions beginning with the time of the injury Each successive question progresses backward in time What happened? What play were you running? Where are you? Who am I? Who are we playing? What quarter is it? What did you have for a pregame meal? Who did we play last week? POSITIVE TEST: Athlete has difficulty remembering or cannot remember events occurring before the injury IMPLICATIONS: Retrograde amnesia: Not remembering events from the day before is more significant that not remembering more recent events The same set of questions should be repeated to determine whether memory is returning, deteriorating, or staying the same Further deterioration of memory or acutely profound memory loss warrants immediate termination of evaluation and transportation to emergency medical facility COMMENTS: Record patient’s responses and verify answers with coaches/teammates Clinical Evaluation: Anterograde Amnesia PATIENT POSITION: Sitting or standing EXAMINER POSITION: Positioned to hear athlete’s response EVALUATION: Athlete is given a list of 4 unrelated items (ask them to memorize the list) Hubcap Rabbit Dog tags Film Ivy POSITIVE TEST: Inability to completely recite the list IMPLICATIONS: Anterograde amnesia, possibly the result of intracranial bleeding COMMENT: Perform the test after test for retrograde amnesia Clinical Evaluation Functional Testing: Cognitive Function Cerebral trauma → Unusual athlete behavior Behavior: Analytical Skills: Violent, irrational, inappropriate behavior Serial 7’s (count backwards from 100) Information Processing: Provide command → can athlete follow? Clinical Evaluation Balance and Coordination: Affected secondary to trauma involving cerebellum and inner ear Tests: Romberg Test Tandem Walking Balance Error Scoring System Clinical Evaluation Romberg Test: Patient Position: ATC Position: Patient shuts eyes and abducts arms to 900 Patient tilts head backwards and lifts 1 foot off ground Patient touches index finger to nose (eyes closed) Positive Test: Ready to support patient Procedure: Standing, feet shoulder width apart Patient unsteadiness Implications: Cerebellar dysfunction Clinical Evaluation Tandem Walking: Patient Position: ATC Position: Athlete walks heel-to-toe along a straight line for approximately 10 yards Athlete returns to starting position by walking backwards Positive Test: Beside patient to provide support Evaluation: Athlete standing with feet straddling a straight line Athlete unable to maintain a steady balance Implications: Cerebral or inner ear dysfunction that inhibits balance Clinical Evaluation Balance Error Scoring System: Patient Position: Patient barefoot or wearing socks (no tape); hands on iliac crest; eyes closed Phase 1: Phase 2: Double Leg Stance Single Leg Stance – standing on the nondominant leg; nonweight-bearing hip flexed to 200 and knee flexed to 400-500 Phase 3: Tandem Leg Stance – nondominant leg placed behind the dominant leg and the patient stands in a heel-toe manner Clinical Evaluation Balance Error Scoring System: ATC Position: In front of the athlete; trials are timed Procedure: First battery performed with athlete standing on a firm surface DL stance, holds position for 20 seconds SL stance Tandem stance Second battery performed with athlete standing on foam Clinical Evaluation Balance Error Scoring System: Scoring: One point is scored for each of the following errors Hands lifted off iliac crest Opening eyes Step, stumble or fall Moving hip into > 30 degrees abduction Lifting forefoot or heel Remaining out of testing position > 5 sec. Note: If more than 1 error scores simultaneously, only 1 error is scored Patients unable to hold the test position for 5 seconds are assigned the score of 10 Positive Test: Scores that are 25% ABOVE patient’s baseline Impaired cerebral function Clinical Evaluation Standardized Assessment of Concussion (SAC) Abbreviated neuropsychological test Immediate objective data Presence and severity of neurocognitive impairment On or off field evaluation Tests: Orientation Immediate Memory Recall Concentration Delayed Recall Clinical Evaluation Neuropsychological Testing: Allow ATCs to objectively quantify athlete cognitive dysfunction Tests: Hopkins Verbal Learning Test (HVLT) – 12 word list; athlete recalls several times Brief Visuospatial Memory Test (BVMT-R) – visual memory Trail Making Test – spatial scanning, speed, cognitive flexibility Controlled Oral Word Association Test (COWAT) – recall as many words as possible in 1 min. (starting with a given letter) Digit Span Test – repeat strings of numbers Symbol Digit Modalities Test (SDMT) – visual scanning and processing speed; match numbers/symbols under pressure Clinical Evaluation Vital Signs: Respirations: Pulse: Number of breaths per minute and quality of respirations Pulse rate and quality Blood pressure Pulse pressure: Systolic pressure – diastolic pressure Normal: 40 mm HG Pulse pressure > 50 mm HG → may indicate increased intracranial bleeding Clinical Evaluation Cranial Nerve Assessment: 12 nerves that emerge directly from the brain stem spinal nerves which emerge from segments of the spinal cord Ganglia of sensory component → outside CNS Ganglia of motor component → within CNS ↑ intracranial pressure impairs motor component Cranial Nerve Function Test (I) Olfactory Transmits sense of smell Check athlete’s ability to smell (II) Optic Transmits visual information to brain Check athlete’s vision (III) Occulomotor Innervates superior, medial, and inferior rectus muscles and inferior oblique Ask athlete to elevate the eyelid, elevate, depress, and adduct the eye (IV) Trochlear Innervates superior oblique muscle Ask athlete to elevate the eyes (V) Trigeminal Receives sensation from the face, innervates muscles of mastication Check sensation of face, ask athlete to elevate, depress, protrude, retrude, laterally deviate jaw (VI) Abducens Innervates lateral rectus muscle Ask athlete to abduct eyes Cranial Nerve Function Test (VII) Facial Motor innervation to muscles of facial expression, receives special sense of taste from anterior 2/3 of the tongue, provides secremotor innervation to salivary glands and lacrimal gland Check athlete’s ability to taste along anterior portion of tongue; elevate, abduct, depress eyebrows, open/close eyes, dilate and constrict nostrils, open and close mouth, protrude lips (VIII) Vestibulocochlear Senses sound, rotation, and gravity (essential for balance and movement) Romberg Test, athlete’s ability to hear (IX) Glossopharyngeal Receives taste from posterior 1/3 of tongue, provides secremotor innervation to parotid gland Check athlete’s ability to taste on posterior tongue and have athlete swallow Cranial Nerve Function Test (X) Vagus Supplies innervation to most laryngeal and pharyngeal muscles, provides parasympathetic fibers to thoracic and abdominal viscera, receives special sense of taste from epiglottis Assess athletes ability to breathe (XI) Accessory Controls muscles of neck and overlaps with functions of vagus nerve Ask athlete to shrug shoulders (XII) Hypoglossal Motor innervation to intrinsic muscles of the tongue Ask athlete to stick out their tongue