Also found in: Dictionary, Thesaurus, Acronyms, Wikipedia.
tibialis anteriorlower-leg anterior-compartment muscle
origin upper segment of lateral surface of tibia and local interosseous membrane
insertion medial side of medial cuneiform and adjacent plantar aspect of first metatarsal base (with insertion peroneus longus tendon)
nerve supply deep peroneal nerve
action ankle dorsiflexion and subtalar joint inversion (supination) in non-weight-bearing foot; aids balance of lower leg and talus on other tarsal bones (so that leg remains vertical even when walking on uneven ground) in weight-bearing foot