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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 4.28

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 4.28

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Median nerve
2. Tendon m. flexor pollicis longus
3. Flexor pollicis brevis m.
4. Abductor pollicis brevis m.
5. Opponens pollicis m.
6. Tendon m. flexor carpi radialis
7. Tendon m. abductor pollicis longus
8. Radial a.

9. Carpal bone, trapezium
10. Tendon m. extensor pollicis brevis
11. Radiate carpal ligament
12. Cephalic v.
13. Dorsal metacarpal a.
14. Tendon m. extensor pollicis longus
15. Third metacarpal, styloid process
16. Tendon m. extensor carpi radialis longus
17. Carpal bone, trapezoid
18. Tendon m. extensor carpi radialis brevis
19. Tendon m. extensor indicis proprius

20. Carpal bone, capitate
21. Tendon m. extensor digiti minimi proprius
22. Tendon m. extensor digitorum
23. Carpal bone, hamate
24. Tendon m. extensor carpi ulnaris
25. Tendons m. flexor digitorum profundus
26. Flexor digiti minimi m.

27. Abductor digiti minimi m.
28. Carpal bone, hook of hamate and ulnar nerve
29. Tendons m. flexor digitorum superficialis
30. Opponens digiti minimi m.
31. Palmaris brevis m.
32. Transverse carpal ligament
33. Median a.
34. Tendon m. palmaris longus

This section passes through part of the hamate (23, 28), capitate (20), trapezoid (17), and the trapezium (9). The styloid process of the third metacarpal (15) can also be distinguished.

The transverse carpal ligament (32) contains the tendons of flexor digitorum superficialis (29) and profundus (25) and flexor pollicis longus (2) in addition to the median nerve (1) within the carpal tunnel. The ulnar nerve (28) and flexor carpi radialis (6) have their own fibroosseous tunnels.

Three hypothenar muscles can be identified: opponens digiti minimi (30), abductor digiti minimi (27), and flexor digiti minimi (26).

The cephalic vein (12) is surrounded by a hematoma.

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