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Flexor digiti minimi brevis of the foot is one of the deep third layer of muscles on the plantar surface of the foot. Its action is to flex the metatarsophalangeal joint of the small toe.
It originates from the base of the fifth metatarsal and the adjacent tendon sheath of peroneus longus. It inserts into the base of the proximal phalanx of the little toe on its lateral side.
It is innervated by the superficial branch of the lateral plantar nerve (S2, S3).
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