Extensor hallucis longus muscle
The tendon passes through a distinct compartment in the inferior extensor retinaculum of foot.[1] Opposite the metatarsophalangeal articulation, the tendon gives off a thin prolongation on either side, to cover the surface of the joint.An expansion from the medial side of the tendon is usually inserted into the base of the proximal phalanx.[citation needed] The muscle inserts at the base of the distal phalanx of the great toe.[3] This article incorporates text in the public domain from page 481 of the 20th edition of Gray's Anatomy (1918)