![]() ![]() It has medial and lateral heads and forms the characteristic "calf" shape of the leg. The gastrocnemius is the most superficial of all the muscles in the posterior leg. Deep bursa of the calcaneal tendon - lies between the tendon and the calcaneus.Subcutaneous calcaneal bursa - lies between the skin and the calcaneal tendon.In this article, we shall look at the anatomy of the muscles in the posterior compartment of the leg - their attachments, actions and clinical correlations. They are innervated by the tibial nerve (a branch of the sciatic nerve). ![]() The muscles in this compartment act to plantarflex and invert the foot. The posterior compartment of the leg contains seven muscles and can be subdivided into superficial and deep compartments. It also contributes to the medial arch of the foot.
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