PCL, or Posterior Cruciate Ligament, is one of the key ligaments in the knee joint. It connects the femur (thigh bone) to the tibia (shin bone) and helps stabilize the knee by preventing the tibia from sliding backward. The PCL plays a crucial role in maintaining proper knee function during activities like walking, running, and jumping. Injuries to the PCL can occur due to sports activities, falls, or accidents. Symptoms of a PCL injury may include pain, swelling, and difficulty in moving the knee. Treatment options range from physical therapy to surgical intervention, depending on the severity of the injury.