Pectoral region and axilla

Left axilla (continued); brachial plexus and axillary artery

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Image #91-4

Pectoral region and axilla

Left axilla (continued); brachial plexus and axillary artery

The axillary vein and its branches have been cut away. Component parts of the brachial plexus have been separated slightly.

1. Internal jugular vein
2. Anterior scalene muscle
3. Jugular trunk
4. Subclavian artery
5. Phrenic nerve
6. Subclavian vein (cut off)
7. Subscapularis muscle
8. Rib II
9. Long thoracic nerve
10. Serratus anterior muscle
11. Upper pointer: Cervical nerve V Lower pointer: Cervical nerve VI
12. Cervical nerve VII
13. Cervical nerve VIII
14. Suprascapular nerve
15. Transverse scapular artery
16. Lateral cord of brachial plexus
17. Branch axillary artery (to subscapularis muscle)
18. Coracoid process of scapula
19. Axillary nerve
20. Musculocutaneous nerve
21. Upper pointer: Coracobrachialis muscle Lower pointer: Anterior circumflex artery of humerus
22. Posterior circumflex artery of humerus
23. Axillary artery (note anomalous bifurcation a short distance distal to pointer. The lateral branch continues as the radial artery, the medial branch as the brachial artery)
24. Radial nerve
25. Thoracodorsal nerve
26. Median nerve
27. Biceps brachii muscle
28. Ulnar nerve
29. Middle antibrachial cutaneous nerve
30. Thoracodorsal artery
31. Teres major muscle
32. Latissimus dorsi muscle