Tibialis Anterior Flashcards
Which nerve innervates the tibialis anterior?
The tibialis anterior is innervated by the deep peroneal (fibular) nerve, which is a branch of the common peroneal nerve (L4, L5, S1).
Where does the tibialis anterior originate from and insert?
The tibialis anterior arises from the lateral condyle and upper half of the lateral body of the tibia, from the adjoining part of the interosseous membrane, from the deep surface of the fascia, and from the intermuscular septum between it and the extensor digitorum longus.
The muscle ends in a tendon on the anteromedial dorsal aspect of the foot close to the ankle; it passes through the most medial compartments of the transverse and cruciate crural ligaments and inserts into the medial and under surface of the medial cuneiform bone and the base of the first metatarsal bone.
What movements does the tibialis anterior contribute to?
The tibialis anterior contributes to dorsiflexing and inverting the foot, in addition to stabilizing the ankle during the contact phase of walking and isometric contractions like kicking a ball.
