Vastus Medialis

Origin Inferior portion of intertrochanteric line, spiral line, medial lip of linea aspera, superior part of medial supracondylar ridge of femur, and medial intermuscular septum
Insertion Medial base and border of patella; also forms the medial patellar retinaculum and medial side of quadriceps femoris tendon
Action Extends the knee
Innervation Muscular branches of femoral nerve (L2, L3, L4)
Arterial Supply Femoral artery, profunda femoris artery, and superior medial genicular branch of popliteal artery

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Muscle Atlas of the Extremities