What is Quadratus femoris?

Quadratus femoris is the muscle of the rear hip. It is located immediately at the back and slightly below the hip joint, its fibers are laterally oriented between the lower pelvis and the upper thigh bone, the long bone of the thigh. This muscle is one of several responsible for turning the thigh outwards into the hip socket. It also helps the muscles of the inner thigh in aduting the foot or pulling the leg inwards towards the center line of the body. Quadratus femoris also plays a role in holding the femoral head on site in acetabul or hip drawer during these movements of the legs. This stems from the ischia pelvis, the lower outer pelvic bone, along the club protrusions known formally as ischial tuberosity and informally as bones of SIT or SITZ. From the outer edge of the ischial tuberosity, Quadratus runs femorisontally through the back of the hip towards the upper part of the back bone of the femur. It then inserts along the vertical line found on the base of the thigh bone called a quadrate tubercle.

bounded by the lower muscle of GEMELLUS above and muscle Aductor Magnus pod, Quadratus femoris is a shoe of external rotators in the hip and the highest group of Aduktor in the thigh. These are deep muscles, located immediately below the large gluteus maximus, a muscle that extends and carries or lifts the side, leg in the hip joint. Although it is technically calculated among the hip muscles together with Glutes, superior and lower gemelli, internus obturator and externus and muscles piriformis, horizontal fibers Quadratus femoris are virtually flushing with ADUCTOR Magnus. They are separated only by the presence of media femoral peripheral blood vessels. The fact that Quadratus directly passes through the hip joint and Aductor also distinguishes two.

The side orientation of this muscle means that when it is withdrawn, it shortens in the side direction and therefore must either pull the thigh in or turn it back. During aduction helps stronger adductor's muscles inner thigh in drawingLike the foot sideways, as when jumping together during the jump connector. To perform side or external rotation, the muscles on the back of the hip work to pull the back of the thigh bones, turn the head of the femur into the hip socket and point the tip out like the head of the ballet dancer.