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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 4.37

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 4.37

Upper Left Quadrant

Lower Left Quadrant

Lower Right Quadrant

Upper Right Quadrant

1. Distal palmar fat pad
2. Distal phalanx, pollex
3. Nail bed
4. Thumbnail

5. First metacarpal a. and palmar digital nerve
6. Fibrous digital sheath
7. Tendon m. flexor digitorum profundus
8. Second phalanx base
9. Second metacarpal
10. Tendon m. extensor indicis proprius
11. Dorsal digital a.
12. Third metacarpal
13. Tendon m. extensor digitorum communis

14. Tendon m. flexor digitorum profundus
15. Fibrous digital sheath
16. Dorsal digital a.
17. Tendon m. extensor digitorum communis
18. Phalanx, proximal fourth digit
19. Tendon m. flexor digitorum profundus
20. Fibrous digital sheath
21. Tendon m. extensor digiti minimi
22. Phalanx, proximal fifth digit

23. Digit 5, middle segment
24. Digit 5, distal segment
25. Tendon m. flexor digitorum superficialis, bifurcation
26. Fibrous digital sheath

This section passes through the distal phalanx of the thumb (2). The thumbnail (4) and nail bed (3) can be identified. The middle three digits are still attached but the fifth digit is now separated, with the section passing through the proximal phalanx (22). The fibrous digital sheaths are well seen (6, 20, 26).

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