[TA] muscle of third layer of plantar muscles; origin, base of metatarsal bone of the little toe and sheath of fibularis longus muscle; insertion, lateral surface of base of proximal phalanx of little toe; action, flexes the little toe at the metacarpophalangeal joint; nerve supply, lateral plantar. SYN: musculus flexor digiti minimi brevis pedis [TA], short flexor (muscle) of little toe.
