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).
Ligaments of the Knee: Lateral (Outside) View. This side view of the knee shows the lateral collateral ligament, one of the four ligaments of the knee. The four knee ligaments connect the upper leg bone (femur) with the large lower leg bone (tibia) and stabilize knee movement. The lateral collateral ligament helps stabilize side-to-side movement. Credits