Quadratus Femoris Muscle, Posterior View

Description

Centered deep in the gluteal region, the quadratus femoris spans from the lateral border of the ischial tuberosity to the quadrate tubercle on the intertrochanteric crest of the proximal femur. It sits inferior to the tendon of obturator externus and posterior to the hip joint capsule, forming a broad, rectangular band that runs laterally toward the femur. Superiorly, the inferior gemellus and obturator internus tendon complex would lie just above it, while the proximal hamstring origin remains medial and inferior at the ischial tuberosity. Short, thick, and distinct. Posterior exposure of quadratus femoris matters because it is a consistent landmark when teaching the deep short external rotators and their relationships to the sciatic nerve and the medial circumflex femoral artery as these structures traverse the deep gluteal space. The muscle is implicated in ischiofemoral impingement, where narrowing between the ischial tuberosity and the lesser trochanter can produce edema or tearing at the quadratus femoris, a pattern often discussed alongside hip pain and snapping phenomena. This posterior anatomy also frames the internervous plane considerations during posterior hip approaches and helps clarify why lesions near the obturator externus tendon can be confused with adjacent rotator pathology. Use this asset for musculoskeletal anatomy courses covering the deep gluteal muscles, for orthopedic texts on posterior hip surgical approaches, and for radiology teaching files correlating quadratus femoris edema on MRI with ischiofemoral impingement. It also fits well in sports medicine and rehabilitation materials focused on hip external rotation strength and posterior hip pain differentials. Anatomical accuracy verified by SciePro's Medical Advisory Board.