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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 4.14

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 4.14

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Flexor carpi radialis m.
2. Lateral antebrachial cutaneous nerve
3. Radial a.
4. Cephalic v.
5. Pronator teres m.
6. Radial nerve, superficial br., and radial recurrent a.
7. Brachioradialis m.
8. Antebrachial fascia
9. Pronator teres m.
10. Extensor carpi radialis brevis m.

11. Extensor carpi radialis longus m.
12. Radius
13. Supinator m.
14. Flexor pollicis longus m.
15. Extensor digitorum communis m.
16. Radial nerve, deep br.
17. Extensor digiti minimi m.
18. Antebrachial interosseous membrane
19. Abductor pollicis longus m.

20. Extensor carpi ulnaris m.
21. Ulna
22. Flexor digitorum profundus m.
23. Flexor carpi ulnaris m.

24. Ulnar nerve
25. Flexor digitorum superficialis m.
26. Palmaris longus m.
27. Median nerve

Abductor pollicis longus muscle (19) makes its first appearance in this section. Abductor pollicis longus arises from the upper and middle third of the ulna (21), the interosseous membrane (18), and the radius (12) and inserts onto the first metacarpal. It is innervated by the deep branch of the radial nerve (16).

Flexor pollicis longus muscle (14) is also seen for the first time. It arises from the anterior surface of the middle third of the radius and inserts onto the distal phalanx of the thumb. It is innervated by the median nerve, anterior interosseous branch.

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