Quadratus femoris muscle

Quadratus Femoris Muscle

Quadratus femoris muscle

The Quadratus Femoris is a flat, quadrilateral skeletal muscle. Located on the posterior side of the hip joint, it is a strong external rotator and adductor of the thigh, but also plays a vital role in stabilizing the hip joint.

Anatomy

The Quadratus Femoris is located inferior to the Gluteus Maximus and originates at the upper margin of the ischial tuberosity. It inserts into the Intertrochanteric crest on the posterior side of the femur. The muscle's fibers run perpendicular to the obturator internus, and the inferior gemellus and superior gemellus muscles.

File:Quadratus femoris muscle - animation.gif

Animation of the Quadratus Femoris muscle

Function

The Quadratus Femoris acts as a strong external rotator and adductor of the thigh. It also helps to stabilize the hip joint by pulling the femoral head into the acetabulum, or hip socket.

Clinical Significance

Injury or strain to the Quadratus Femoris can result in hip pain, particularly in athletes or those who engage in vigorous physical activity. This condition is often referred to as Ischiofemoral Impingement.

See Also

• List of muscles of the human body
• Hip Muscles
• Ischiofemoral Impingement