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Volar aspect of right hand

Thenar muscles

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Image #104-4
Bassett Image
Diagram Image
Legend Image
Volar aspect of right hand
Thenar muscles
The second metacarpal bone has been transected and the index finger removed. The tendon of the flexor pollicis longus muscle (9) has been cut off. The abductor pollicis brevis (10) has been partially resected. The remaining thenar muscles have been separated. The palmar aponeurosis has been cut away and the flexor tendons have been removed from the carpal canal (16).
  1. Adductor pollicis muscle (oblique head)
  2. Anterior common digital artery
  3. Metacarpal II (cut)
  4. Anterior radial index artery
  5. Adductor pollicis muscle (transverse head)
  6. Dorsal interosseous muscle
  7. Lumbrical muscle II
  8. Ligament of digital sheath
  9. Flexor pollicis longus muscle (tendon of insertion)
  10. Abductor pollicis brevis muscle (divided and partially removed)
  11. Flexor pollicis brevis muscle (left pointer superficial head; right pointer deep head)
  12. Opponens pollicis muscle
  13. Groove for tendon of flexor pollicis longus muscle
  14. Abductor pollicis longus muscle (tendon of insertion)
  15. Flexor carpi radialis muscle (tendon of insertion)
  16. Carpal tunnel
  17. Anterior carpal ligament
  18. Ulnar artery and nerve
  19. Transverse carpal ligament
  20. Flexor digiti minimi muscle
  21. Left pointer: Deep branch of ulnar nerve Right pointer: Deep anterior branch ulnar artery
  22. Anterior interosseous fascia
  23. Anterior common digital artery
  24. Fascial septum between palmar aponeurosis and anterior interosseous fascia
  25. Transverse fascicle of palmar aponeurosis