Quadratus Femoris
Musculus quadratus femoris
The quadratus femoris is the most inferior of the six deep lateral rotators, a flat quadrilateral muscle that strongly externally rotates and stabilizes the hip. It also assists adduction and helps center the femoral head in the acetabulum during loaded movement. Like the other deep rotators it is trained indirectly through rotational hip control and single-leg stability work.
- Actions
- Hip external rotation, Hip adduction (assist), Hip joint stabilization
- Origin
- Lateral border of the ischial tuberosity
- Insertion
- Quadrate tubercle on the intertrochanteric crest of the femur
- Innervation
- Nerve to quadratus femoris (L4-S1)
- Blood supply
- Medial circumflex femoral and inferior gluteal arteries
Synergists PiriformisObturator InternusObturator ExternusSuperior GemellusInferior GemellusGluteus Maximus
Antagonists Tensor Fasciae Latae