Your knee relies on four major ligaments to keep it stable.
- The ACL and the posterior cruciate ligament (PCL) are in the center of your knee. The ACL stabilizes the knee from sliding forward while the PCL stabilizes the knee from backward movement.
- The medial collateral ligament (MCL) controls stability of the inner (medial) knee while the lateral collateral ligament (LCL) controls stability of the outer (lateral) knee.
When to Make an Appointment
A popping sensation and sound with knee swelling during physical activity should prompt early medical attention; there's a good chance you’ve torn your ACL or had another knee injury.
Visit Duke Orthopaedics Urgent Care
Our convenient orthopaedic urgent care clinic is open seven days a week. Get fast service with no long waits and no unnecessary exposure to illness. No appointment is needed; walk-ins are welcome.