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 b rachial artery and median cubital vein. Median nerve to b rachial 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.