Lumbricals
| Headline | |
|---|---|
| Action | Flex MCPJs Extend interphalangeal joints |
| Origin | 1, 2: two lateral tendons of flexor digitorum profundus 3, 4: three medial tendons of flexor digitorum profundus |
| Insertion | lateral side of extensor expansions |
| Innervation | 1, 2: median nerve 3, 4: deep branch of ulnar nerve |