Extensor Hallucis Longus
Leg & Ankle
Testing this muscle (big toe extension) is a quick neurological screen for L5 nerve root function.
Function
Extends great toe, assists dorsiflexion and inversion
Origin
Middle anterior surface of fibula and interosseous membrane
Insertion
Base of distal phalanx of great toe
Innervation
Deep fibular nerve (L5-S1)