| 1
.
| Ligament of digital sheath |
| 2
.
| Left pointer: Extensor expansion Right pointer: Location of metacarpophalangeal joint |
| 3
.
| Dorsal interosseous muscle II (left pointer, insertion into extensor expansion; right pointer, insertion into base of proximal phalanx) |
| 4
.
| Lumbrical muscle II |
| 5
.
| Deep transverse metacarpal ligament |
| 6
.
| Dorsal metacarpal artery II |
| 7
.
| Anterior interosseous muscle I |
| 8
.
| Metacarpal II (transected) |
| 9
.
| Common extensor digitorum muscle (tendon to index finger, transected) |
| 10
.
| Branch dorsal metacarpal artery I (dorsal digital artery) |
| 11
.
| Dorsal interosseous muscle I |
| 12
.
| Adductor pollicis muscle (transverse head) |
| 13
.
| Superficial palmar arch |
| 14
.
| Left pointer: Flexor digitorum superficialis (cut) Middle pointer: Flexor digitorum profundus muscle (cut) Right pointer: Lumbrical muscle I |
| 15
.
| Left pointer: Anterior common digital artery Right pointer: Common palmar digital nerve of median nerve |
| 16
.
| Fascial septa which extended from palmar aponeurosis (removed) to anterior interosseous fascia and, indirectly, to metacarpal bones |
| 17
.
| Anterior interosseous fascia |
| 18
.
| Fascial extension around lumbrical muscle II (incised and reflected to expose "lumbrical canal") |
