Illustration showing three of the heads of quadriceps. The fourth head - vastus intermedius - is not seen here as it lies underneath the rectus femoris.
Quads contraction, showing how the rectus femoris takes much of the load as the knee extends.
The 'quads' is a short name for the 'Quadriceps muscle'.
Illustration showing three of the heads of quadriceps. The fourth head - vastus intermedius - is not seen here as it lies underneath the rectus femoris.
Quads contraction, showing how the rectus femoris takes much of the load as the knee extends.