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Volar aspect of right hand

Origins of lumbrical muscles

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Image #103-5
Bassett Image
Diagram Image
Legend Image
Volar aspect of right hand
Origins of lumbrical muscles
The tendons of the flexor digitorum sublimis (3) have been divided and the proximal parts removed. The common synovial sheath has been removed to expose the origins of the lumbrical muscles from the deep flexor tendons. The digital tendon sheaths have been removed except for that of the fifth finger.
  1. Sheath ligament (cut to release enclosed flexor tendons)
  2. Deep transverse metacarpal ligament
  3. Flexor digitorum superficialis (tendons cut off)
  4. Dorsal interosseous muscle I
  5. Adductor pollicis muscle
  6. Ligament of digital sheath
  7. Abductor pollicis brevis muscle
  8. Flexor pollicis brevis muscle (deep head)
  9. Flexor pollicis longus muscle (tendon of insertion)
  10. Muscular slip originating with flexor pollicis brevis muscle and inserting with opponens pollicis muscle
  11. Opponens pollicis muscle
  12. Abductor pollicis longus muscle (tendons of insertion)
  13. Flexor carpi radialis muscle (tendon of insertion)
  14. Superficial anterior branch radial artery
  15. Flexor carpi ulnaris muscle (tendon of insertion)
  16. Ulnar artery
  17. Deep surface of carpal tunnel
  18. Flexor digitorum profundus muscle
  19. Deep branch of ulnar nerve (terminal branch)
  20. Opponens digiti minimi muscle
  21. Flexor digiti minimi muscle
  22. Lumbrical muscles
  23. Tendons of flexor digitorum profundus muscle
  24. Aberrant slips of lumbrical muscles III-IV