The quadratus femoris is one of the muscles of the deep group of muscles within the gluteal region. It is a flat quadrangular shaped muscle, and is the most inferiorly located deep gluteal muscle.
The gluteal region consists of two groups of muscles:
- Deep group: small muscles which mainly laterally rotate the femur at the hip joint. These include the piriformis, obturator internus, gemellus superior, gemellus inferior, and quadratus femoris.
- Superficial group: larger muscles which cause abduction and extension of the femur at the hip joint. These include the gluteus maximus, gluteus medius, gluteus minimis and the tensor fascia latae.
- Lateral margin of obturator ring (above Ischial tuberosity)
- Quadrate tubercle
- Intertrochanteric crest of proximal posterior femur
- Lateral rotation of hip
- Assists adduction of hip
- Quadratus femoris branch of nerve to the Quadratus femoris and inferior gemellus: L5, S1
- Inferior gluteal artery
- Medial circumflex femoral artery