The vastus medialis is one of the quadriceps muscles of the anterior compartment of the thigh.
The quadriceps muscles are made up of the rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius. The other muscles in the anterior compartment is the sartorius, and within the upper part of the anterior compartment are the distal ends of the ilacus and psoas major muscles.
Origin
- Superior half of anterior and medial surfaces of femur
Insertion
- Medial border and base of patella (then joins patella ligament to insert on the tibial tuberosity)
Action
- Extends the knee
Innervation
- Muscular branches of femoral nerve: L2,L3, L4
Blood Supply
- Femoral artery
- Superior medial genicular branch of popliteal artery