Extensor hallucis longus muscle 347059 224000529 2008-07-06T21:59:25Z Vedran12 7322109 interwiki hr {{Infobox Muscle | Name = {{PAGENAME}} | Latin = musculus extensor hallucis longus | GraySubject = 129 | GrayPage = 481 | Image = Gray441.png | Caption = The mucous sheaths of the tendons around the ankle. Lateral aspect. (Ext. hall. long. labeled at upper left.) | Image2 = Gray440_color.png | Caption2 = Cross-section through middle of leg. (Extensores longi digitorum et hallucis labeled at upper left.) | Origin = Arises from the middle portion of the [[fibula]] on the anterior surface and the [[interosseous membrane]] | Insertion = Inserts on the dorsal side of the base of the [[distal phalanx]] of the [[big toe]] | Blood = [[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 muscle|Flexor hallucis longus]], [[Flexor hallucis brevis muscle|Flexor hallucis brevis]] | MeshName = | MeshNumber = | DorlandsPre = m_22 | DorlandsSuf = 12548925 | }} The '''Extensor hallucis longus''' is a thin muscle, situated between the [[Tibialis anterior]] and the [[Extensor digitorum longus]] that functions to extend the big toe, [[Dorsiflexion|dorsiflex]] the foot, and assists with foot [[Inversion (kinesiology)|inversion]]. 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 bones|phalanx]] of the great toe. Opposite the [[Metatarsophalangeal articulations|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 muscle|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. ==Additional images== <gallery> Image:Gray442.png|The mucous sheaths of the tendons around the ankle. Medial aspect. Image:Gray835.png|Deep nerves of the front of the leg. Image:Gray836.png|Nerves of the dorsum of the foot. Image:Extensor hallucis longus.png </gallery> == External links == * {{GPnotebook|-1657470947}} * {{SUNYAnatomyLabs|15|st|04|02}} - "The Leg: Muscles" * {{MuscleLoyola|exhl}} * {{eMedicineDictionary|Extensor+hallucis+longus}} * [http://www.rad.washington.edu/atlas2/exthallong.html University of Washington] {{Gray's}} {{Muscles of lower limb}} [[Category:Calf muscles]] {{muscle-stub}} [[de:Musculus extensor hallucis longus]] [[fr:Muscle long extenseur de l'hallux]] [[hr:Dugački ispružač palca]] [[ja:長母趾伸筋]]