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Anatomy Atlases: Atlas of Human Anatomy in Cross Section: Section 4. Upper Limb

Atlas of Human Anatomy in Cross Section: Section 4. Upper Limb

Plate 4.2

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Jean J. Jew, M.D., and Paul C. Reimann, B.S.
Peer Review Status: Externally Peer Reviewed

Plate 4.2

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Cephalic v.
2. Humerus
3. Brachialis m.

4. Posterior antebrachial cutaneous nerve
5. Radial nerve
6. Radial collateral a.
7. Triceps brachii, lateral head m.
8. Triceps brachii, medial head m.

9. Triceps brachii, long head m.
10. Ulnar nerve

11. Basilic v.
12. Brachial a.
13. Median nerve
14. Brachial v.
15. Musculocutaneous nerve
16. Biceps brachii, short head m.
17. Coracobrachialis m; (last appearance)
18. Biceps brachii, long head m.

This section is two below the preceding one (2 cm).

Coracobrachialis (17) makes its last appearance in this section. The musculocutaneous nerve (15) is located between biceps brachii (long head) (18) and the coracobrachialis (17) muscle. This nerve supplies all the anterior compartment muscles and continues as the lateral (antebrachial) cutaneous nerve (of the forearm).

The ulnar nerve (10) has moved dorsally and will lie on the medial edge of the long head of the triceps brachii muscle (9).

The radial nerve (5) has completed its migration around the humerus (2) and now lies in the posterior compartment, adjacent to the humerus, on the lateral side of the arm.

The radial collateral artery (6) is the distal continuation of the deep (profunda) brachial artery.

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