Knee flexor

Knee Flexor

Diagram of the human knee

The Knee flexor is a group of muscles in the human body that are primarily responsible for flexing the knee joint. These muscles include the Hamstring muscles, which are located at the back of the thigh, and the Gastrocnemius muscle, which is part of the calf.

Anatomy

The knee flexors are composed of three main muscles: the Biceps Femoris, the Semitendinosus, and the Semimembranosus. These muscles originate from the Ischial tuberosity and insert into different parts of the Tibia and Fibula.

File:Hamstring Muscles.png

The hamstring muscles, major components of the knee flexors

Function

The primary function of the knee flexors is to bend the knee, bringing the heel towards the buttock. This action is crucial for many daily activities, such as walking, running, and jumping. The knee flexors also play a role in stabilizing the knee joint and controlling the speed and force of its extension.

Clinical Significance

Injuries to the knee flexors, such as a hamstring strain, are common in athletes and can result in significant pain and disability. Treatment typically involves rest, ice, compression, and elevation (RICE), along with physical therapy to restore strength and flexibility.

See Also

• Knee extensor muscles
• Knee joint
• Muscles of the lower limb