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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 4.25

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 4.25

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Median nerve
2. Antebrachial fascia
3. Tendon m. flexor carpi radialis
4. Tendon m. flexor pollicis longus
5. Radial a.
6. Tendon m. abductor pollicis longus

7. Tendon m. extensor pollicis brevis
8. Radius, distal
9. Radial nerve, superficial br.
10. Tendon m. extensor carpi radialis longus
11. Tendon m. extensor carpi radialis brevis
12. Tendon m. extensor pollicis longus
13. Extensor retinaculum

14. Tendon m. extensor digitorum communis
15. Tendon m. extensor digiti minimi
16. Radioulnar articulation, distal
17. Tendon m. extensor carpi ulnaris
18. Ulnar collateral ligament, distal
19. Ulna, head
20. Radioulnar joint, articular cavity
21. Basilic v.

22. Radiocarpal ligament
23. Flexor carpi ulnaris m. and tendon
24. Tendons m. flexor digitorum profundus
25. Ulnar nerve
26. Ulnar a.
27. Tendon m. flexor digitorum superficialis
28. Antebrachial fascia and tendon m. palmaris longus

This is the last section of the forearm. Subsequent sections are of the wrist and hand.

The radioulnar articulation is well seen in this section. The head of the ulna (19) articulates with the radius (16). Note the joint, articular space, and cavity (20).

The radius and ulna are seen for the last time. The strong radiocarpal ligament (22) makes its first appearance. The ligament extends from the distal end of the radius posteriorly to join the proximal row of carpal bones.

Note how the dorsal surface of the radius is grooved to accommodate the tendons of the extensor muscles (10, 11, 12, 14).

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