World Library  
Flag as Inappropriate
Email this Article

Extensor hallucis longus muscle

Article Id: WHEBN0000347059
Reproduction Date:

Title: Extensor hallucis longus muscle  
Author: World Heritage Encyclopedia
Language: English
Subject: Human leg, Flexor hallucis brevis muscle, Anterior compartment of leg, Flexor hallucis longus muscle, Foot
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Extensor hallucis longus muscle

Extensor hallucis longus muscle
The mucous sheaths of the tendons around the ankle. Lateral aspect. (Ext. hall. long. labeled at upper left.)
Cross-section through middle of leg. (Extensores longi digitorum et hallucis labeled at upper left.)
Details
Latin musculus extensor hallucis longus
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
anterior tibial artery
deep fibular nerve
deep peroneal nerve, L5 (L4-S1)
Actions Extends the big toe and assists in dorsiflexion of the foot at the ankle. Also is a weak evertor/ invertor
Antagonist Flexor hallucis longus, Flexor hallucis brevis
Dorlands
/Elsevier
m_22/12548925
Anatomical terms of muscle

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, dorsiflex the foot, and assists with foot eversion and 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 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.

Contents

  • Variations 1
  • Innervation 2
  • Additional Images 3
  • References 4
  • External links 5

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.

Innervation

Deep peroneal(fibular) nerve, branch of common peroneal(fibular) nerve (L4, L5, S1).

Additional Images

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

  • -1657470947 at GPnotebook
  • Anatomy photo:15:st-0402 at the SUNY Downstate Medical Center - "The Leg: Muscles"
  • University of Washington
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.