A thick band of connective tissue that runs along the outer thigh and plays a key role in stabilizing the knee.
The iliotibial band (IT band) is a long, fibrous tissue that extends from the hip to the outer part of the knee. It is primarily composed of collagen and provides structural support to the hip and knee joints. The band is crucial for the normal functioning of the leg during activities such as walking, running, and jumping.
Terminologia Anatomica
tractus iliotibialis
System
Musculoskeletal system
Function
The iliotibial band acts as a stabilizer for the hip and knee joints. It helps control the movement of the thigh bone (femur) during physical activities, particularly in activities involving running and lateral movements. As the leg flexes and extends, the IT band minimizes friction between the thigh muscle and the knee joint. It helps maintain proper alignment of the knee while providing support and strength to the lateral aspect of the thigh, which is crucial in preventing injuries often associated with repetitive activities like running.
Location
The iliotibial band is located on the lateral side of the thigh, starting from the ilium bone of the pelvis and extending down to the tibia, specifically to a bony prominence known as Gerdy's tubercle. This band runs alongside the thigh, lying just beneath the skin and over muscles such as the tensor fasciae latae and gluteus maximus. Its proximity to these muscles allows it to synchronize movement effectively during various physical activities while maintaining tension and stability.
Did You Know?
The iliotibial band is particularly important for runners and athletes, as tightness in this band can lead to conditions like iliotibial band syndrome, which causes pain on the outer side of the knee.
The IT band helps with the absorption of shock during running, contributing to energy efficiency and performance.
The band is often treated with physical therapy exercises, stretching, and sometimes foam rolling to alleviate tension and promote flexibility.