Origin

Lower two-thirds of posterior surface of shaft of fibula, posterior intermuscular septum, interosseous membrane

Insertion

Base of distal phalanx of great toe

Actions

Flexes distal phalanx of great toe, assists in plantar flexing foot, inverts foot

Nerve

Tibial nerve (L5, S1, S2)

Note

This muscle is important in pushing off the surface in walking, running, jumping.