the muscles that extends the lower leg are vastus lateralis, vastus medialis and vastus intermedius. These muscles collectively make up the quadriceps..
Quadriceps' units and sartorius
Flexing the thigh, extending the leg, adducts leg
extends leg; straightens knee joint
Tendu is a leg exercise that stretches the leg muscle at you extend it. And degage is the same but a little lift off the floor.
An inability to extend the leg could result from a loss of function in the quadriceps muscle group, which is primarily responsible for knee extension. This loss of function could be due to nerve damage, muscle injury, or conditions affecting the neuromuscular junction. Additionally, issues in the patellar tendon or surrounding ligaments could also impede the leg's ability to extend fully. Overall, the inability to extend the leg indicates a disruption in the normal motor function of the lower limb.
The quadriceps is the large muscle at the front of the thigh, which is divided into four distinct portions and acts to extend the leg.
The quadriceps muscle helps straighten and extend the leg and the hamstring helps bend the knee.
Much of the semimembranosus lies deep to the semitendinosus.
The dorsiflexors include the extensorum longus, the tibialis anterior, and the peroneus.
The knee helps your leg flex and extend.
The primary job of the quadriceps muscle is to extend the knee joint, which means straightening the lower leg. It also helps stabilize the knee during movement and contributes to activities like walking, running, and jumping.
The flexor would be the hamstring, and gastrocnemius, which bend/flex the knee. The quadriceps, are extensors, which straighten/extend the knee.