extensor hallucis longus muscle
- origin: anterior surface of the middle half of the fibula and the adjacent interosseous membrane
- insertion: the dorsal side of the base of the distal phalanx of the 1st toe
- action: extends the 1st toe and assists in dorsiflexion
- arterial supply: anterior tibial artery
- innervation: deep peroneal nerve (L5, S1)
- key relationships: between tibialis anterior and extensor digitorum longus.