Human Anatomy: Muscle Groups |
| Muscle Function & Other Pertinent Medical Information | |
| - LUMBRICALS - | |
| ORIGIN: | Lateral 3: bipennate origin from cleft between the four tendons of flexor digitorum longus . medial 1: unipennate origin from medial aspect of 1st tendon |
| INSERTION: | Dorsal extensor expansion |
| ACTION: | Extend toes at interphalangeal joints and flex metatarsal phalangeal joints |
| NERVE: | First: medial plantar nerve (L4,5). 2-4: deep branch of lateral plantar nerve (S2,3) |