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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 4.5

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 4.5

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Cephalic v., surrounded by hematoma
2. Brachialis m.

3. Radial nerve
4. Deep (profunda) brachial a.
5. Brachioradialis m.
6. Radial collateral a. and posterior antebrachial cutaneous nerve
7. Lateral epicondylar ridge of humerus
8. Triceps brachii, lateral head m.

9. Medial epicondyle of humerus
10. Tendon m. triceps brachii
11. Triceps brachii, long head m.

12. Ulnar nerve
13. Basilic v.
14. Median nerve
15. Brachial a. and v.
16. Biceps brachii m.

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

This section cuts the two remaining muscles of the anterior compartment, biceps brachii (16) and brachialis (2) muscles, and the single muscle of the posterior compartment of the arm, triceps brachii (8, 10, 11).

Brachioradialis (5) is increasing in size. Note how it and brachialis (2) surround the radial nerve (3), which supplies the two muscles, brachialis only partially.

The median nerve (14) retains its immediate proximity to the brachial artery (15).

The humerus is becoming less rounded and more triangular in appearance due to the development of the lateral epicondylar ridge (7) and medial epicondyle (9).

Note the hematoma associated with the cephalic vein (1) and spreading into the surrounding superficial (fatty) fascia.

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