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Extensor hallucis brevis muscle

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Title: Extensor hallucis brevis muscle  
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Subject: Foot, Human leg, Calf muscles, Calcaneus, Sacral plexus
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Extensor hallucis brevis muscle

Extensor hallucis brevis
The mucous sheaths of the tendons around the ankle. Medial aspect. (Ext. hall. long. labeled at top center.)
Muscles of the front of the leg. (Ext. halluc. long. labeled vertically at center.)
Details
Latin musculus extensor hallucis brevis
Origin calcaneus
Insertion proximal phalanx of digit 1 (hallux, or the great toe)
dorsalis pedis artery
deep fibular nerve
Actions Extend hallux
Antagonist Flexor hallucis brevis muscle
Dorlands
/Elsevier
m_22/12548920
Anatomical terms of muscle

The extensor hallucis brevis is a muscle on the top of the foot that helps to extend the big toe.

Contents

  • Structure 1
    • Innervation 1.1
  • Function 2
  • See also 3
  • Additional Images 4
  • External links 5

Structure

The extensor hallucis brevis is essentially the medial part of the extensor digitorum brevis muscle. Some anatomists have debated whether these two muscles are distinct entities.

The extensor hallucis brevis arises from the calcaneus and inserts on the proximal phalanx of the digit 1 (the big toe).

Innervation

Nerve supply: lateral terminal branch of Deep Peroneal Nerve (deep fibular nerve) (proximal sciatic branches S1,S2). Same innervation of Extensor Digitorum Brevis

Function

The extensor hallucis brevis helps to extend the big toe.

See also

Additional Images

External links

  • -577109939 at GPnotebook
  • Anatomy figure: 16:03-05 at Human Anatomy Online, SUNY Downstate Medical Center - "Dorsum of the foot showing the tendons that cross the ankle joint."
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