APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The quadriceps femoris muscle group (rectus femoris, vastus lateralis, vastus medius, and vastus intermedius) crosses the knee via the patella and acts to extend the leg. The hamstring group muscles (semitendinosus, semimembranosus, and biceps femoris) flex the knee and extend the hip.

Detailed explanation-2: -The quadriceps are a group of muscles present on the front of the thigh. They consist of four distinct muscles: the rectus femoris, the vastus lateralis, the vastus intermedius, and the vastus medialis. They are responsible for extending the leg and helping with movements such as walking and jumping.

Detailed explanation-3: -Quadriceps femoris is the most powerful extensor of the knee. All four of its components are capable to extend the knee, however, they do so in different directions. Rectus femoris muscle aligns with the mechanical axis of the lower limb and pulls the patella along this axis.