![]() ![]() Master the leg muscle anatomy by exploring our videos, quizzes, labelled diagrams and articles.įibularis tertius muscle (Musculus fibularis tertius) It also assists in the dynamic support of the medial arch of the foot. The functions of the tibialis anterior are dorsiflexion of the foot at the talocrural joint and inversion of the foot at the subtalar joint. Its blood supply is derived from branches of the anterior tibial artery, and to a smaller extent, the posterior tibial artery. The tibialis anterior is innervated by the deep fibular (peroneal) branch of the common fibular nerve. The tendon continues across the ankle and dorsum of the foot to insert into the medial cuneiform bone and the base of the first metatarsal bone of the foot. It courses inferiorly down the leg until it reaches the distal third of the tibia, where it extends into a cord-like tendon. The tibialis anterior is a fusiform muscle that originates from the lateral surface of the tibial condyle and the superior two-thirds of the proximal shaft of tibia. Posterior compartment: posterior tibial artery Lateral compartment: superficial fibular nerveĪnterior compartment: anterior tibial artery Tibialis anterior, extensor digitorum longus, fibularis tertius, extensor hallucis longus Muscles of the lower extremity below the knee joint that mainly produce movements of the foot at the ankle joint Key facts about the leg muscles Definition This article will introduce you to the anatomy and function of the leg muscles. This action plays an important role in maintaining balance while standing on one leg or walking on rough surfaces.
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