Nerve deep fibular nerve | Artery dorsalis pedis artery Actions Extend hallux | |
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Insertion proximal phalanx of digit 1 (hallux, or the great toe) Antagonist Flexor hallucis brevis muscle | ||
The extensor hallucis brevis is a muscle on the top of the foot that helps to extend the big toe.
Contents
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.
References
Extensor hallucis brevis muscle Wikipedia(Text) CC BY-SA