A muscle that originates in the upper two-thirds of the lateral surface of the tibia and inserts into the medial cuneiform and first metatarsal bones of the foot. Its acts to invert the foot. It is situated on the lateral side of the tibia; it is thick and fleshy above, tendinous below. This muscle overlaps the anterior tibial vessels and deep peroneal nerve in the upper part of the leg. [WP,unvetted]. The M. tibialis cranialis is a muscle that flexes the tarsometatarsus. It originates on the craniodistal aspect of the femur and proximal tibiotarsus and inserts on the cranial surface of the tarsometarsus[EvoWiki]. [ http://en.wikipedia.org/wiki/Tibialis_anterior_muscle http://evolutionwiki.org/wiki/M._tibialis_cranialis ]