1
.
| Anterior interosseous muscle I |
2
.
| Dorsal interosseous muscle II |
3
.
| Lumbrical muscle II |
4
.
| Dorsal interosseous muscle III |
5
.
| Anterior interosseous muscle II |
6
.
| Ligament of digital sheath IV |
7
.
| Proper palmar digital nerve of ulnar nerve |
8
.
| Lumbrical muscle IV |
9
.
| Deep transverse metacarpal ligament |
10
.
| Dorsal interosseous muscle IV |
11
.
| Digital sesamoid bones |
12
.
| Abductor digiti minimi muscle |
13
.
| Anterior interosseous muscle III (near insertion into extensor expansion) |
14
.
| Extensor expansions |
15
.
| Common extensor digitorum muscle (tendons blending with capsules of metacarpophalangeal joints) |
16
.
| Subcutaneous dorsal metacarpophalangeal bursae |
17
.
| Flexor digitorum superficialis (tendon to index finger) |
18
.
| Flexor digitorum profundus muscle (tendon to index finger) |
19
.
| Lumbrical muscle I |
20
.
| Digital sesamoid bone |
21
.
| Dorsal interosseous muscle I (insertion) |
22
.
| Metacarpal I (head) |
23
.
| Collateral ligament of metacarpophalangeal joint III |