Muscle Anatomy

vastus lateralis

The vastus lateralis is a large muscle located halfway down the outer side of the thigh.


The vastus lateralis originates on the lateral surface of the femur from just below the upper head of the bone to almost the lower end.


The vastus muscles run almost the entire length of the femur and converge into the quadriceps femoris tendon, which attaches to the patella bone (kneecap).


Knee joint extension.