The iliotibial band is a thickened and strong tendinous strap which runs down the side of the thigh.
It is attached throughout its length to the back of the femur along the ridge called the 'linea aspera'. Below the knee it attaches to the outer side of the tibia.
At its upper part the gluteal (buttock) muscles attach to it as well as the tensor fascia lata muscle, while at the lower end the adductor muscles of the knee attach to it.
The patella also has a fibrous connection with the iliotibial band, via the intermediate layer of the lateral retinaculum, the fibrous patellar support on the outer side of the kneecap.
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