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Dorsal Interossei of the Foot
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| Dorsal Interossei of the Foot | |
|---|---|
| Muscle Type | |
| Origin | Bipennate from inner aspects of shafts of all metatarsals |
| Insertion | Bases of proximal phalanges and dorsal extensor expansions of medial side of 2nd toe and lateral sides of 2nd , 3rd and 4th toes |
| Action | Abduct 2nd , 3rd and 4th toes from axis of 2nd toe. Assist lumbricals in extending interphalangeal joints while flexing metatarsal phalangeal joints |
| Synergists | |
| Antagonists | |
| Spinal innervation | |
| Peripheral Innervation | lateral plantar nerve (1-3: deep branch; 4: superficial branch) (S2, 3) |
| Vasculature | |
