Anatomy Atlases(tm) : A digital library of anatomy information
Home | About | FAQ | Reviews | Search
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 4.22

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 4.22

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Tendon m. flexor carpi radialis
2. Median nerve
3. Radial a.
4. Radial nerve, superficial br.
5. Flexor pollicis longus m.

6. Cephalic v.
7. Tendon m. brachioradialis
8. Tendon m. abductor pollicis longus
9. Radius
10. Tendons mm. extensores carpi radialis brevis and longus
11. Extensor pollicis brevis m
12. Antebrachial interosseous membrane
13. Extensor pollicis longus m. and tendon

14. Posterior interosseous a. and v.
15. Tendons m. extensor digitorum communis
16. Extensor indicis proprius m.
17. Tendon m. extensor digiti minimi
18. Pronator quadratus m.
19. Tendon m. extensor carpi ulnaris
20. Ulna
21. Ulnar nerve, dorsal br. of hand
22. Pronator quadratus m.

23. Basilic v.
24. Flexor carpi ulnaris m.
25. Flexor digitorum profundus m.
26. Ulnar nerve
27. Ulnar a.
28. Flexor digitorum superficialis m.
29. Tendon m. palmaris longus

As noted with the previous section, pronator quadratus (18, 22) thickens distally. It is now twice as thick as it was in the preceding section.

The bellies of both the extensor and flexor muscles are increasingly tendinous as they approach the wrist.

The muscle tendons that enter the carpal tunnel or canal usually include four from flexor digitorum superficialis (28), four from flexor digitorum profundus (25), and one from flexor pollicis longus (5). The median nerve (2) will also traverse the carpal canal to supply the thenar muscles and, usually, the first two lumbricals.

Next Page | Previous Page | Section Top | Title Page

Home | About Us | FAQ | Reviews | Contact Us | Search
Anatomy Atlases is curated by Michael P. D'Alessandro, M.D. and Ronald A. Bergman, Ph.D.

Please send us comments by filling out our Comment Form.

All contents copyright © 1995-2024 the Author(s) and Michael P. D'Alessandro, M.D. All rights reserved.

"Anatomy Atlases", the Anatomy Atlases logo, and "A digital library of anatomy information" are all Trademarks of Michael P. D'Alessandro, M.D.

Anatomy Atlases is funded in whole by Michael P. D'Alessandro, M.D. Advertising is not accepted.

Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.

The information contained in Anatomy Atlases is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.

URL: http://www.anatomyatlases.org/