Arm

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

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Image #95-5
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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The muscles have been retracted to show the course of the musculocutaneous nerve.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)