Arm

Nerve supply to left coracobrachialis, biceps and brachialis muscles, medial view

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Image #95-5

Arm

Nerve supply to left coracobrachialis, biceps and brachialis muscles, medial view

The muscles have been retracted to show the course of the musculocutaneous nerve.

1. Radial nerve
2. Vertebral margin of scapula
3. Teres major muscle
4. Thoracodorsal artery
5. Latissimus dorsi muscle (tendon of insertion)
6. Triceps brachii muscle
7. Superior ulnar collateral artery
8. Ulnar nerve
9. Medial intermuscular septum
10. Median nerve
11. Brachial artery
12. Joint of humerus
13. Middle cord of brachial plexus
14. Upper pointer: Musculocutaneous nerve Lower pointer: Branches of musculocutaneous nerve (to coracobrachialis muscle)
15. Lateral head of median nerve
16. Posterior circumflex artery of humerus
17. Coracobrachialis muscle
18. Medial head of median nerve
19. Lymph node along course of deep brachial artery
20. Biceps brachii muscle (short head)
21. Biceps brachii muscle (long head)
22. Branches of musculocutaneous nerve (to biceps brachii muscle)
23. Muscular branch radial artery
24. Radial artery (note anomalous, but not infrequent, high origin from brachial artery)
25. Brachialis muscle
26. Lateral antebrachial cutaneous nerve
27. Branches of musculocutaneous nerve (to brachialis muscle)