The quadratus femoris is a muscle of the gluteal region in the lower limb. It is the most inferior of the deep gluteal muscles, located below the gemelli and obturator internus.
- Attachments: Originates from the lateral aspect of the ischial tuberosity and attaches to the quadrate tuberosity on the intertrochanteric crest.
- Actions: Lateral rotation of the lower limb.
- Innervation: Nerve to quadratus femoris.
- Blood Supply: Inferior gluteal artery and medial circumflex femoral artery