muscles on the plantar surface of the foot: fourth layer

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4 Terms

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fourth layer of foot muscles

deepest layer: dorsal interossei, plantar interossei

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dorsal interossei

O: adjacent sides of metatarsals
I: bases of the proximal phalanges of toes II-IV and extensor hood
A: ABduction of toes II-IV resist MTP extension and flexion of IP joints
N: lateral plantar nerve and deep fibular nerve

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plantar interossei

O: sides of metatarsals III-V
I: medial side of dorsal extensor expansion, base of proximal phalanges III-V
A: ADduction of toes III-V: resist MTP extension and flexion of IP joints
N: lateral plantar nerve

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