Quadratus femoris muscle

It originates on the lateral border of the ischial tuberosity of the ischium of the pelvis. At its origin, the upper margin of the adductor magnus is separated from it by the terminal branches of the medial femoral circumflex vessels. A bursa is often found between the front of this muscle and the lesser trochanter. == Clinical significance ==

Groin pain can be a disabling ailment with many potential root causes: one such cause, often overlooked, is quadratus femoris tendinitis. Magnetic resonance imaging can show abnormal signal intensity at the insertion of the right quadratus femoris tendon, which suggests inflammation of the area. Since the muscle works to laterally rotate and adduct the femur, actions involving the lower body can strain the muscle. In addition, patients present with hip pain and an increased signal intensity of the MRI of the quadratus femoris have been shown to also have a significantly narrower ischiofemoral space compared to the general populace. The ischiofemoral impingement may be a cause of the hip pain associated with quadratus femoris tendinitis. ==Additional images==

File:Gray245.png|Right femur. Posterior surface. File:Gray344.png|Structures surrounding right hip-joint. File:Gray832.png|Nerves of the right lower extremity Posterior view. File:Slide6hh.JPG|Quadratus femoris muscle File:Slide1BIBI.JPG|Muscles of Thigh. Anterior views. == Notes ==