Anterior and Lateral Regions of the leg Ling Shucai Regional anatomy of lower limb The superficial structures Cutaneous nerves saphenous nerve superficial peroneal nerves. Superficial veins great saphenous v. The deep structures Deep fascia The deep fascia of the leg is very strong. The deep fascia of the leg is very strong. Superior extensor retinaculum Inferior extensor retinaculum Inferior extensor retinaculum Muscles of leg Muscles of leg Anterior group Tibialis anterior Extensor hallucis longus Extensor digitorum longus Peroneus tertius Lateral group Peroneus longus Peroneus brevis Functions: Plantar flex and evert the foot Plantar flex and evert the foot Muscles of foot Tibialis anterior Origin: lateral surface of tibia Insertion: medial cuneiform and base of 1st metatarsal Action: dorsiflexes and inverts foot Nerve supply: deep peroneal n. deep peroneal n. Anterior tibial a. Descends on anterior surface of interosseous membrane In front of ankle joint becomes dorsal a. of foot Dorsal a. of foot Dorsal a. of foot Dorsalis pedis artery It begins on the anterior surface of the ankle joint and runs with the deep peroneal nerve it divides into the arcuate artery and the first dorsal metatarsal artery at the proximal end of the first intermetatarsal space. Common peroneal n. passes over posterior aspect of head of fibula and then winds around neck of fibula, deep to peroneus longus, where it divides into deep and superficial peroneal nerves Deep peroneal n. descends on interosseous membrane and enters dorsum of foot; supplies anterior muscles of leg, and skin of first interdigital cleft Superficial peroneal n. supplies peroneus longus and brevis and skin on anterior surface of leg and dorsum of foot Deep peroneal nerve