The quadratus femoris muscle is a thick rectangular muscle which lies deep in the upper and medial thigh and gluteal region. Posteriorly, it is covered by the gluteus maximus muscle, and anteriorly by the obturator externus, the pectineus, the rectus femoris, and adductor brevis muscle.
The quadratus femoris originates from the lateral surface of the tuberosity of the ischium (inferior dorsal portion of the hip bone) and it is inserted into the trochanteric crest of neck of femur bone.
Blood Supply
The quadratus femoris muscle is supplied by the inferior gluteal, medial circumflex femoral, and the obturator artery.
Action/function
The quadratus femoris rotates the thigh laterally.
Innervation
It is innervated by a branch of the sciatic nerve.
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| Above, the quadratus femoris muscle in red. The rectus femoris has been cut off to make it visible. |
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