Muscle Atlas


Origin: Medial head from posterior nonarticular surface of medial femoral condyle; Lateral head from lateral surface of femoral lateral condyle
Insertion: The two heads unite into a broad aponeurosis which eventually unites with the deep tendon of the soleus 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: Each head supplied by a sural branch of the popliteal artery

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