Anatomical hierarchy

General Anatomy > Muscles; Muscular system > Muscles of lower limb > Muscles > Extensor hallucis longus

Translations

Description

Origin: Middle portion of the fibula on the anterior surface and theinterosseous membrane

Insertion: Dorsal side of the base of the distal phalanx of the Hallux

Artery: Anterior tibial artery

Nerve: Peroneal nerve

Action: Extends the big toe and assists in dorsiflexion of the foot at the ankle. Also is a weak invertor

Antagonist: Flexor hallucis longus, Flexor hallucis brevis

Description:
The Extensor hallucis longus (Extensor proprius hallucis) is a thin muscle, situated between the Tibialis anterior and the Extensor digitorum longus. It arises from the anterior surface of the fibula for about the middle two-fourths of its extent, medial to the origin of the Extensor digitorum longus; it also arises from the interosseous membrane to a similar extent. The anterior tibial vessels and deep peroneal nerve lie between it and the Tibialis anterior. The fibers pass downward, and end in a tendon, which occupies the anterior border of the muscle, passes through a distinct compartment in the cruciate crural ligament, crosses from the lateral to the medial side of the anterior tibial vessels near the bend of the ankle, and is inserted into the base of the distal phalanx of the great toe. 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.
Variations.—Occasionally united at its origin with the Extensor digitorum longus.Extensor ossis metatarsi hallucis, a small muscle, sometimes found as a slip from the Extensor hallucis longus, or from the Tibialis anterior, or from the Extensor digitorum longus, or as a distinct muscle; it traverses the same compartment of the transverse ligament with the Extensor hallucis longus.


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/).

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