<Tr> <Td_colspan="2"> Anatomical terms of muscle (edit on Wikidata) </Td> </Tr> <P> The quadriceps femoris (/ ˈkwɒdrɪsɛps ˈfɛmərɪs /, also called the quadriceps extensor, quadriceps or quads), is a large muscle group that includes the four prevailing muscles on the front of the thigh . </P> <P> It is the great extensor muscle of the knee, forming a large fleshy mass which covers the front and sides of the femur . The name derives from Latin four - headed muscle of the femur . </P> <P> It is subdivided into four separate portions or' heads', which have received distinctive names: </P>

Which of the following muscles is not part of the quadriceps femoris