Vastus Lateralis

Friday, September 30, 2011

The vastus lateralis is the largest of the four muscles which make up the quadriceps femoris. Located on the lateral side of the thigh, the vastus lateralis is a large muscle that arises from a flat broad tendon which is anchored to the intertrochanteric line of the femur, the greater trochanter, the lateral lip of the gluteal tuberosity, and the lateral lip of the linea aspera. The fibers of the muscle are gathered to form a strong aponeurosis that converges to become a flat tendon before inserting under the patella and onto the lateral condyle of the tibia. The vastus lateralis helps extend the leg as it is innervated by the femoral nerve.