Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN: Inferomedial shafts of 3rd , 4th and 5th metatarsals (single heads)
INSERTION: Medial sides of bases of proximal phalanges with slips to dorsal extensor expansions of 3rd, 4th and 5th toes
ACTION: Adduct 3rd 4th and 5th toes to axis of 2nd toe, Assist lumbricals in extending interphalangeal joints while flexing metatarsal phalangeal joints
NERVE: Deep branch of lateral plantar nerve (S2,3)

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