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The quadriceps femoris muscle
Last reviewed: 07.07.2025
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The quadratus femoris is a flat, quadrangular muscle located between the inferior gemellus muscle at the top and the upper edge of the adductor magnus at the bottom. It begins at the upper part of the outer edge of the ischial tuberosity and is attached to the upper part of the intertrochanteric crest. There is often a synovial bursa between the anterior surface of the muscle and the greater trochanter.
Function of the quadratus femoris: rotates the thigh outward.
Innervation of the quadratus femoris muscle: sciatic nerve (LIV-SI).
Blood supply of the quadratus femoris muscle: inferior gluteal and obturator arteries, medial circumflex femoral artery.
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