Opis

Origin: Femur

Insertion: Patella and Tibial tuberosity via the Patellar ligament

Artery: Femoral artery

Nerve: Femoral nerve

Action: Extends knee

Antagonist: Hamstring

Description:
The Vastus medialis (Vastus internus) arises from the lower half of the intertrochanteric line, the medial lip of the linea aspera, the upper part of the medial supracondylar line, the tendons of the Adductor longus and the Adductor magnus and the medial intermuscular septum. Its fibers are directed downward and forward, and are chiefly attached to an aponeurosis which lies on the deep surface of the muscle and is inserted into the medial border of the patella and the Quadriceps femoris tendon, an expansion being sent to the capsule of the knee-joint.


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