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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 4.18

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 4.18

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Tendon m. palmaris longus
2. Median nerve
3. Brachioradialis m.
4. Radial a.
5. Cephalic v.
6. Flexor pollicis longus m.

7. Tendon m. extensor carpi radiolus longus
8. Extensor carpi radiolus brevis m.
9. Radius
10. Anterior interosseous nerve
11. Abductor pollicis longus m.
12. Anterior interosseous a. and v.
13. Extensor digitorum communis m.

14. Radial nerve, deep br.
15. Antebrachial interosseous membrane
16. Extensor digiti minimi m.
17. Extensor pollicis longus m.
18. Extensor carpi ulnaris m.
19. Ulna

20. Basilic v.
21. Flexor digitorum profundus m.
22. Flexor carpi ulnaris m.
23. Ulnar nerve
24. Ulnar a.
25. Flexor digitorum superficialis m.

This section is similar to the preceding one. Brachioradialis (3) is becoming thinner and more anteriorly placed. Between brachioradialis (3) and extensor carpi radialis longus (7) (now seen as a tendon) and brevis (8) is the radial artery (4). It lies opposite the cephalic vein (5) at this level.

The median nerve (2) lies between flexor digitorum superficialis (2 5) and flexor pollicis longus (6).

Flexor carpi ulnaris (22) forms the cover for the ulnar artery (24) and the ulnar nerve (23).

The radial nerve lies in the space between the superficial and deep layers of the radiodorsal (extensor) muscle grouping.

The composition of the deep and superficial muscle layers is discussed with the preceding section.

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