Vastus medialis - Anatomy

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