Abductor hallucis - Musculus abductor hallucis
Origin: Tuberosity of the calcaneus
Insertion: Medial aspect of base of proximal phalanx of hallux
Nerve: Medial plantar nerve
Action: Abducts hallux
Antagonist: Adductor hallucis muscle
The Abductor hallucis lies along the medial border of the foot and covers the origins of the plantar vessels and nerves. It arises from the medial process of the tuberosity of the calcaneus, from the laciniate ligament, from the plantar aponeurosis, and from the intermuscular septum between it and the Flexor digitorum brevis. The fibers end in a tendon, which is inserted, together with the medial tendon of the Flexor hallucis brevis, into the tibial side of the base of the first phalanx of the great toe.
Variations.—Slip to the base of the first phalanx of the second toe.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).