The extensor hallucis brevis is a muscle on the top of the foot that helps to extend the big toe.
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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).
Nerve supply
Nerve supplied by 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
This article uses anatomical terminology.
Additional images
External links
Wikimedia Commons has media related to Extensor hallucis brevis muscles.- 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."