Muscle Atlas


Origin: Posterior aspect of fibular head, upper 1/4 - 1/3 of posterior surface of fibula, middle 1/3 of medial border of tibial shaft, and from posterior surface of a tendinous arch spanning the two sites of bone origin
Insertion: Eventually unites with the gastrocnemius aponeurosis to form the Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface
Action: Powerful plantar flexor of ankle
Innervation: Tibial nerve (S1, S2)
Arterial Supply: Posterior tibial, peroneal, and sural arteries

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