1
.
| Metacarpophalangeal joint capsule |
2
.
| Left pointer: Extensor indicis muscle (tendon of insertion) Right pointer: Common extensor digitorum muscle (tendon of insertion) |
3
.
| Head of metacarpal II (covered with articular cartilage) |
4
.
| Collateral ligament (cut) |
5
.
| Body of metacarpal II |
6
.
| Dorsal interosseous muscle I |
7
.
| Synovial fold |
8
.
| Lumbrical muscle I |
9
.
| Insertion of extensor tendons on base of proximal phalanx |
10
.
| Extensor expansion (reflected dorsally) |
11
.
| Phalanx I |
12
.
| Ligament of digital sheath |
13
.
| Base of phalanx (covered with articular cartilage) |
14
.
| Collateral ligament (inner aspect of lateral ligament) |
15
.
| Anterior accessory ligament (left pointer on cut edge, right pointer on articular surface of ligament) |
16
.
| Tendon of digital sheath |
17
.
| Flexor digitorum profundus muscle (tendon) |
18
.
| Flexor digitorum superficialis (tendon) |