The |extensor hallucis longus| for the most part lies deep in the lower leg. It is a thin, elongated, and flattened muscle that originates from the middle of the |fibula| (lower leg bone) and tapers into a long, narrow ~tendon~ that emerges from between the |extensor digitorum| longus and the |tibialis anterior|, extends downward across the ankle and inserts in the top base of the |distal phalanx| of the big toe. It extends the big toe and assists in flexing the foot.
