Volar aspect of right hand

Thenar muscles

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Image #104-4
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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