| 1
.
| Deep transverse metacarpal ligament |
| 2
.
| Lumbrical muscle I |
| 3
.
| Anterior interosseous muscle I |
| 4
.
| Anterior interosseous fascia |
| 5
.
| Dorsal interosseous muscle I |
| 6
.
| Adductor pollicis muscle (oblique head, divided) |
| 7
.
| Muscle fascicle with origin from shaft of first metacarpal and insertion on base of first phalanx (independent of deep head of flexor pollicis brevis and comparable to anterior interosseous muscles; frequently referred to as first anterior interosseous muscle) |
| 8
.
| Princeps pollicis artery |
| 9
.
| Flexor pollicis brevis muscle (deep head, dissected) |
| 10
.
| Muscular branch of ulnar nerve (to dorsal interosseous muscle I) |
| 11
.
| Muscular branch of ulnar nerve (to oblique head of adductor pollicis muscle and deep part of flexor pollicis brevis muscle) |
| 12
.
| Metacarpotrapezial joint capsule |
| 13
.
| Transverse carpal ligament |
| 14
.
| Anterior carpal rete |
| 15
.
| Flexor carpi ulnaris muscle (tendon of insertion) |
| 16
.
| Pisiform bone (covered by ligament) |
| 17
.
| Muscular branch ulnar artery |
| 18
.
| Pisometacarpal ligament |
| 19
.
| Branch perforans (from recurrent carpal branch of deep anterior arch) |
| 20
.
| Deep branch of ulnar nerve |
| 21
.
| Deep palmar arch |
| 22
.
| Adductor pollicis muscle (transverse head, near origin) |
| 23
.
| Upper pointer: Dorsal interosseous muscle III Lower pointer: Anterior interosseous muscle II |
| 24
.
| Metacarpal V |
| 25
.
| Anterior accessory ligament |
| 26
.
| Digital fibrous sheath (transected, flexor tendons removed) |
