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Gastrocnemius: Origin, Insertion, Action & Nerve Supply

Gastrocnemius: The gastrocnemius is a very potent superficial bipennate muscle that is in the back part of the lower leg muscles. It moves from its two heads just over the knee to the heel, a two joint muscle.

gastrocnemius muscle

Origin: Lower posterior surface of the femur above the medial condyle. Lateral head from the lateral surface of the femoral lateral condyle.

Insertion: The two heads unite into a broad aponeurosis which eventually unites posterior surface of the calcaneus via the Achilles tendon, inserting in the middle 1/3 of the posterior calcaneal surface.

Function: Powerful plantar flexor of the ankle joint.

Nerve Supply: Tibial nerve (S1, S2).

Muscles of the Lower Limb

Leg Muscles
Thigh Muscles
Foot Muscles

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