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Kinesiology for Manual Therapies
Chapter 8
The Elbow and Radioulnar Joints
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8-2
Learning Outcomes
8-1 Define key terms.
o 8-2 Locate on a human skeleton all
bony landmarks of the elbow and
radioulnar joints.
o 8-3 Label on a skeletal chart all
bony landmarks of the elbow and
radioulnar joints.
o
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8-3
Learning Outcomes (cont.)
8-4 Draw and identify the muscles
of the elbow and radioulnar joints on
a skeletal chart.
o 8-5 Palpate the muscles of the
elbow and radioulnar joints on a
partner.
o
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8-4
Learning Outcomes (cont.)
8-6 Explore origins and insertions of
the muscles of the elbow and
radioulnar joints on a partner.
o 8-7 Organize and list the agonists,
antagonists, and synergists of the
elbow and radioulnar joints.
o
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8-5
Learning Outcomes (cont.)


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8-8 Demonstrate with a fellow
student all the active and passive
movements of the elbow and
radioulnar joints.
8-9 Practice basic stretching and
strengthening appropriate for the
elbow and radioulnar joints.
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8-6
Introduction
This text has grouped the elbow and
radioulnar joints together because of
their close relationship.
 The elbow joint is formed by the ulna
articulating with the humerus.

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Introduction (cont.)
The radius pivots with the ulna to
form the radioulnar joint.
 The elbow joint performs flexion and
extension.
 The radioulnar joint performs
supination and pronation.

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8-8
Bones
The ulna is much larger proximally
than the radius.
 The scapula and humerus serve as
the proximal attachments for the
muscles that flex and extend the
elbow.

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Bones (cont.)
If a muscle is involved in the
action of supination or pronation, it
must insert on the radius.
 The radius and the ulna are
connected via the interosseous
membrane.

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Bones (cont.)
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Bones (cont.)
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Bones (cont.)
There are many important bony
landmarks for muscular attachment.

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Joints
The elbow joint is a ginglymus or
hinge-type joint and only allows
flexion and extension.
 Ligaments bind the joint for
additional stability.

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Joints (cont.)
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Joints (cont.)
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Joints (cont.)
The radioulnar joint is a trochoid or
pivot-type joint.
 This joint performs supination and
pronation.

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Joints (cont.)
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Joints (cont.)
There is a synergy between the
glenohumeral, elbow, and radioulnar joint
muscles.
 The glenohumeral and elbow muscles
contract to stabilize or assist the
movements of the radioulnar joint.

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Movements
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Movements (cont.)
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Movements (cont.)
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Muscles
The elbow flexors are biceps
brachii, brachialis, brachioradialis,
and weakly the pronator teres.
 The elbow extensors are the triceps
brachii and the anconeus.

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Muscles (cont.)
The pronator group includes the
pronator quadratus, the pronator teres,
and the brachioradialis.
 The supinator, biceps brachii, and
the brachioradialis perform supination.

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Muscles (cont.)
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Muscles (cont.)
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Muscles (cont.)
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Muscles (cont.)
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Nerves
The muscles of the elbow and
radioulnar joints are innervated from the
median nerves, musculocutaneous
nerves, and radial nerves of the brachial
plexus.

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Nerves (cont.)
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Nerves (cont.)
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Individual Muscles of the Elbow and
Radioulnar Joints
Biceps Brachii
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Biceps Brachii
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Brachialis
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Brachialis
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Brachioradialis
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Brachioradialis
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Triceps Brachii
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Triceps Brachii
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8-39
Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Anconeus
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Anconeus
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8-41
Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Pronator Teres
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Pronator Teres
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Pronator Quadratus
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Pronator Quadratus
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Supinator
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Individual Muscles of the Elbow and
Radioulnar Joints (cont.)
Supinator
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Chapter Summary
The bones, joints, movements,
muscles, and nerves of the elbow joint
and radioulnar are explored in this
chapter.

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8-48
Chapter Summary (cont.)
Individual muscles of the elbow joint and
radioulnar joint are reviewed in depth with
regard to palpation, origin, insertion, action,
and innervation.
 Each muscle includes information with
clinical notes, muscle specifics, clinical
flexibility and strengthening.

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8-49
Chapter Review
The Chapter Review is divided into true
and false, short answers, and multiple
choice questions.
 The questions are designed for the
students to test their knowledge.
 Worksheets are at the end of the text as
an aid for learning.

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Explore and Practice

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Students should utilize the questions and
charts at the end of the chapter to help
focus on the content of the chapter.
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