Quadratus femoris muscle
| Quadratus femoris muscle |
|---|
|
| Scheme of the deep hip muscles |
| origin |
| Sciatic tuberosity |
| approach |
| Crista intertrochanterica of the femur |
| function |
| Turns thighs outwards |
| Innervation |
| Quadrati femoris nerve , rarely also sciatic nerve |
| Spinal segments |
| L4-S1 |
The quadratus femoris muscle ( Latin for "quadrangular thigh muscle ") is one of the short dorsal skeletal muscles of the hip . It connects distally to the musculus gemellus inferior .
function
The quadratus femoris muscle is the second strongest external rotator of the femur after the gluteus maximus muscle when the thigh is extended . In addition, when his muscle flesh contracts, the sciatic nerve , which runs across it, lifts , preventing it from becoming trapped between the greater femoral trochanter and the sciatic tuberosity . When the hip is flexed, the muscle is also an abductor of the free leg and when the hip is extended it is an adductor .