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The abductor hallucis (Latin: musculus abductor hallucis) is a fusiform-shaped small muscle located in the plantar side of the foot. It forms the superficial layer of the medial plantar foot muscle group (muscles of the big toe). The abductor hallucis stretches between the calcaneus and proximal phalanx of the hallux. As the name suggests, the abductor hallucis aids in abducting the big toe.
|Medial process of calcaneal tuberosity, flexor retinaculum
|Base of proximal phalanx of hallux
|Abduction and flexion of hallux, supports medial longitudinal arch of the foot
|Medial plantar nerve (S1 - S2)
|Medial plantar and first plantar metatarsal arteries
The abductor hallucis muscle originates from the medial process of the calcaneal tuberosity and flexor retinaculum.
The abductor hallucis inserts on the base of the proximal phalanx of the hallux (first toe of the foot or big toe).
The abductor hallucis muscle provides the abduction and flexion of the big toe at the first metatarsophalangeal joint. Also, it supports the medial longitudinal arch of the foot.
The abductor hallucis receives arterial blood supply from the medial plantar and first plantar metatarsal arteries.