How Do You Spell QUADRATUS FEMORIS MUSCLE?

The quadratus femoris muscle is a deep, posterior muscle located in the pelvic region of the human body. It is part of the hip musculature and is situated in the gluteal region, specifically between the ischial tuberosity (the sitting bone) and the upper part of the femur (thighbone). The term "quadratus femoris" is derived from Latin, where "quadratus" means square or rectangular, and "femoris" refers to the femur.

This muscle is quadrilateral in shape, hence its name. It arises from the lateral border of the ischial tuberosity, which is the bony prominence at the base of the pelvis when sitting. The quadratus femoris then runs obliquely downwards and laterally to insert onto the intertrochanteric crest of the femur, which is a prominent ridge on the inner side of the upper leg bone.

The primary function of the quadratus femoris muscle is to laterally rotate the hip joint, or in other words, to turn the thigh outward. It plays a crucial role in the movements of the leg during activities such as walking, running, and squatting. Additionally, it provides stability to the hip joint by supporting the head of the femur and preventing its excessive movement.

In summary, the quadratus femoris muscle is a deep, four-sided muscle in the hip region that helps to rotate the thigh laterally and contributes to the stability of the hip joint.