![]() ![]() Near to the insertion of quadratus femoris the cruciate anastomosis (the anastomosis between medial and lateral circumflex arteries, the gluteal artery and the first perforating artery) is found. A bursa may be found between quadratus femoris muscle and lesser trochanter. ![]() On occasion, these two muscles are fused together, in which case the gap disappears. A gap exists between these two muscles through which the medial circumflex artery passes. Here, the inferior part of quadratus femoris lies parallel with the superior border of adductor magnus. Moving inferior still, the adductor magnus muscle can be found. Quadratus femoris is the most inferiorly placed of all external rotators of the hip, sitting immediately below the gemellus inferior muscle. Anteriorly, the quadratus femoris muscle is in close relation to the tendon of obturator externus muscle, which separates it from the capsule of the hip joint. Like all the small deep gluteal muscles, the posterior surface of quadratus femoris is covered by the gluteus maximus muscle.
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