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ELBOW COMPLEX

ELBOW COMPLEX. Elbow Complex. Type of joint: Hinge joint. Uniaxial. Function: Antebrachium extension and flexion. Antebrachium supination and pronation. Articulating Surfaces. Humeroulnar: Trochlear notch to trochlea Flexion and extension Humeroradial:

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ELBOW COMPLEX

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  1. ELBOW COMPLEX

  2. Elbow Complex • Type of joint: Hinge joint. Uniaxial. • Function: Antebrachium extension and flexion. Antebrachium supination and pronation.

  3. Articulating Surfaces • Humeroulnar: Trochlear notch to trochlea Flexion and extension • Humeroradial: Fovea of head of radius to capitulum Flexion and extension Pronation and supination

  4. 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

  5. Carrying Angle • 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.

  6. Ligaments • Medial (ulnar) collateral: Medial epicondyle to coronoid process and olecranon process. Slack ligament results in valgus deformity.

  7. Ligaments • Lateral (radial) collateral: Lateral epicondyle to annular ligament and olecranon process. Slack ligament results in varus deformity. • Close-packed position: Extension.

  8. Ligaments • 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.

  9. 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.

  10. 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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