• Course: the posterior tibial artery arises as a terminal branch of the popliteal artery. It is accompanied by its venae comitantes and supplies the flexor compartment of the leg. Approximately midway down the calf the tibial nerve crosses behind the artery from medial to lateral. The artery ultimately passes behind the medial malleolus to divide into medial and lateral plantar arteries under the flexor retinaculum. The latter branches gain access to the sole deep to abductor hallucis. Posterior to the medial malleolus the structures which can be identified—from front to back—are: tibialis posterior, flexor digitorum longus, posterior tibial artery and venae comitantes, the tibial nerve and flexor hallucis longus.
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