Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
- DORSAL INTEROSSEI (FOOT) -
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
NERVE:	lateral plantar nerve (1-3: deep branch; 4: superficial branch) (S2, 3)

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