Download ELBOW COMPLEX

ELBOW COMPLEX
Elbow Complex
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Type of joint:
Hinge joint.
Uniaxial.
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Function:
Antebrachium extension and flexion.
Antebrachium supination and pronation.
Articulating Surfaces

Humeroulnar:
Trochlear notch to trochlea
Flexion and extension

Humeroradial:
Fovea of head of radius to capitulum
Flexion and extension
Pronation and supination
Articulating Surfaces

Radioulnar joints:
Superior:
Radial notch of ulna and annular ligament
Inferior:
Ulnar notch of radius, articular disc, head of ulna
Intermediate:
Interosseous membrane
Syndesmosis
Carrying Angle
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Longitudinal axis of humerus:
Long axis through trochlea:
Results in a lateral deviation of antebrachium:
5 degrees in men.
10-15 degrees in women.
Increase =
Cubitus valgus.
Decrease =
Cubitus varus.
Ligaments

Medial (ulnar) collateral:
Medial epicondyle to coronoid process and
olecranon process.
Slack ligament results in valgus deformity.
Ligaments

Lateral (radial) collateral:
Lateral epicondyle to annular ligament and
olecranon process.
Slack ligament results in varus deformity.

Close-packed position:
Extension.
Ligaments
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Annular ligament:
Attached to ulna.
Forms sling around neck of radius.

Note:
Review relationships of muscles, arteries,
and nerves to elbow complex from syllabus.
Avascular necrosis.
 Lateral epicondylitis.
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Relationships

Bicipital aponeurosis to brachial artery and
median cubital vein.
Median nerve to brachial artery
 Ulnar nerve to:

Medial epicondyle.
Olecranon process.
Origins of flexor carpi ulnaris.
Relationships
Epicondyles of humerus to collateral
arteries of cubital region.
 Ulnar artery to deep (ulnar) head of
pronator teres.
 Median nerve to heads of pronator teres.
 Superficial and deep radial nerves to
supinator muscle.
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