Iliotibial Tract

At the border of the gluteus maximus the "gluteal aponeurosis" splits to enclose the muscle. Here, the thin external layer of this tissue (called the "gluteal fascia") is closely bound to the superficial fascia and the muscle, and it sends divisions down between the large bundles of the muscle. The muscular fasciculi end in a broad tendon, which becomes fused with more tissue in what is known as the "iliotibial tract."