tibialis anterior (muscle)

tib·i·a·lis an·te·ri·or (mus·cle)

[TA]
medial muscle of anterior (dorsiflexor) compartment of leg; origin, upper two thirds of lateral surface of tibia, interosseous membrane, and overlying crural fascia; insertion, medial cuneiform and base of first metatarsal; action, dorsiflexion and inversion of foot; provides dynamic support of longitudinal and transverse arches of foot; nerve supply, deep peroneal.