Medical Author: Benjamin Wedro, MD, FACEP, FAAEM
Medical Editor: Melissa Conrad Stöppler, MD, Chief Medical Editor
Iliotibial Band Syndrome Overview
The iliotibial band (IT band) is a thick band of fibers that begins at the iliac crest (the border of the most prominent bone of the pelvis) in the pelvis and runs on the lateral or outside part of the thigh until it attaches into the tibia (shinbone). The gluteal or buttock muscle fibers and the tensor fascia latae (muscles of the hip joint) attach to it, and the band acts to coordinate muscle function and stabilize the knee during running.
Iliotibial band syndrome describes the pain caused by inflammation of the band as it crosses the lateral condyle of the femur. When the leg is in a straight (known as extended) position, the band fibers are anterior to, or in front of, the condyle (a bony projection on the femur, or thigh bone). As the knee flexes, the fibers move across the condyle and are positioned behind or posterior to it. A bursa or sac in this area allows the iliotibial band to glide over the end of the femur.
FULL article with much more info here:http://bit.ly/18H218q