What is ADHD? ADHD (attention deficit-hyperactivity disorder) affects both adults and school-aged children. Symptoms include restlessness, difficulty paying attention, and hyperactivity. The causes of ADHD are unknown, however factors such as diet, environment and genetics may contribute to symptoms.
The knee muscles control how the knee joint and patella move. There are two main groups of muscles, the quadriceps and the hamstrings, as well as a small muscle behind the knee (popliteus).
Some other muscles that assist with the movements of the knee include the tensor fasciae latae, popliteus and the articularis genus muscles. The tensor fasciae latae contracts the iliotibial band of fibrous connective tissue that helps to stabilize the femur, tibia, and thigh muscles.