Anatomy
Origin:
Anterolateral part of the superior surface of calcaneus and inferior extensor retinaculum.
Insertion:
Dorsal surface of the base of the proximal phalanx of the hallux (big toe).
Key Relations:
Merely the medial part of extensor digitorum brevis.
Functions
Extends the hallux at the interphalangeal joint (assists extensor hallucis longus).
Supply
Nerve supply:
Deep fibular (peroneal) nerve (L5, S1).
Blood supply:
-Peroneal (fibular) artery
-Dorsalis pedis artery (continuation of anterior tibial artery).
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