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Arm Lecture
Gross Anatomy of the Arm
| Question | Answer |
|---|---|
| Coracobrachialis Prox. | Tip of coracoid process |
| Coracobrachialis Dist. | Middle 1/3 of medial humerus |
| Coracobrachialis Act. | Flexes and ADducts arm at Glenohumeral Joint |
| Coracobrachialis Inn. | Musculocutaneous Nerve (pierces coracobrachialis) |
| Biceps Brachii Short Head Prox. | Coracoid Process |
| Biceps Brachii Short Head Dist. | Bicipital Aponeurosis |
| Biceps Brachii Short Head Act. | Forearm Supination |
| Biceps Brachii Short Head Inn. | Musculocutaneous Nerve |
| Biceps Brachii Long Head Prox. | Supraglenoid Tubercle |
| Biceps Brachii Long Head Dist. | Tuberosity of Radius |
| Biceps Brachii Long Head Act. | Elbow Flexion when Supinated |
| Biceps Brachii Long Head Inn. | Musculocutaneous Nerve |
| Brachialis Prox. | Distal 1/2 of anterior humerus |
| Brachialis Dist. | Coranoid Process and Ulnar Tuberosity |
| Brachialis Act. | Elbow Flexion ONLY |
| Brachialis Inn. | Musculocutaneous Nerve |
| Triceps Brachii Long Head Prox. | Infraglenoid Tubercle |
| Triceps Brachii Medial Head Prox. | Posterior surface of humerus |
| Triceps Brachii Lateral Head Prox. | Posterior surface of humerus |
| Triceps Brachii Dist. | Olecranon Process and Forearm Fascia |
| Triceps Brachii Act. | Elbow Extension and Humeral Head Stabilization (Long Head Only) |
| Triceps Brachii Inn. | Radial Nerve |
| Anconeus Prox. | Lateral epicondyle of humerus |
| Anconeus Dist. | Lateral Olecranon and Superior/Posterior Ulna |
| Anconeus Act. | Assists in Extension, Stabilizes Elbow, ABducts Ulna During Pronation |
| Brachial Artery Branches | Deep Brachial Artery and Superior/Inferior Ulnar Collateral Arteries |
| Brachial Artery Path | From Teres Major to Neck of Radius in Cubital Fossa |
| 4 Major Nerves of Arm | Median, Ulnar, Musculocutaneous, Radial |
| Musculocuteous Nerve | Supplies anterior compartment of brachial region, pierces coracobrachialis, becomes lateral antebrachial cutaneous nerve |
| Radial Nerve | Supplies Posterior Brachial Region |
| Contents of Cubital Fossa | Brachial Artery and Terminal Branches, Brachial and Median Cubital Veins, Median Nerve, Radial Nerve, Medial/Lateral Antebrachial Cutaneous Nerves |