Lumbricals of the hand
The lumbricals are intrinsic muscles of the hand that flex the metacarpophalangeal joints, and extend the interphalangeal joints.
| Lumbricals of the hand | |
|---|---|
The muscles of the left hand. Palmar surface. (first lumbricalis labeled at bottom right of muscular group) | |
| Details | |
| Origin | flexor digitorum profundus |
| Insertion | extensor expansion |
| Artery | superficial palmar arch, common palmar digital arteries, deep palmar arch, dorsal digital artery |
| Nerve | Third and fourth deep branch of ulnar nerve, first and second median nerve |
| Actions | flex metacarpophalangeal joints, extend interphalangeal joints |
| Identifiers | |
| Latin | musculi lumbricales manus |
| TA98 | A04.6.02.065 |
| TA2 | 2532 |
| FMA | 37385 |
| Anatomical terms of muscle | |
The lumbrical muscles of the foot also have a similar action, though they are of less clinical concern.
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