Volar aspect of right hand

Opponens pollicis muscle; nerve supply to abductor pollicis brevis muscle

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Image #102-3

Volar aspect of right hand

Opponens pollicis muscle; nerve supply to abductor pollicis brevis muscle

The abductor pollicis brevis (7) has been reflected from its origin. The muscle was readily divided into two distinct laminae, the smaller of which is more deeply placed.

1. Ligament of digital sheath
2. Proper palmar digital artery (to thumb)
3. Metacarpophalangeal pollicis joint capsule
4. Dorsal digital nerve of radial nerve
5. Extensor pollicis longus muscle
6. Extensor pollicis brevis muscle
7. Abductor pollicis brevis muscle (reflected in two parts)
8. Flexor pollicis brevis muscle
9. Muscular branch of median nerve (recurrent branch)
10. Opponens pollicis muscle
11. Abductor pollicis longus muscle (lower pointer on tendinous slip which inserted into abductor pollicis brevis muscle)
12. Superficial anterior branch radial artery
13. Flexor carpi radialis muscle (tendon of insertion)
14. Anterior carpal ligament
15. Transverse carpal ligament
16. Ulnar artery
17. Muscular branch ulnar artery
18. Muscular branch of ulnar nerve (to flexor and abductor digiti minimi muscles)
19. Opponens digiti minimi muscle
20. Flexor digiti minimi muscle
21. Proper palmar digital nerves of ulnar nerve (displaced medially)