This muscle is the largest of the quadriceps group (often called quads) which also includes the rectus femoris, the vastus intermedius, and the vastus medialis. Collectively, the quadriceps muscle ...

Like the other three muscles of the quadriceps group (vastus lateralis, vastus intermedius, and rectus femoris), the vastus medialis runs the length of the femur and functions to extend the knee.

According to the study, individual muscle volumes and cross-sectional measurements were obtained for the vastus medialis (VM), vastus lateralis, vastus intermedius and rectus femoris. Thus ...