Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Knee ligaments

Ligaments are tough, ropy fibers that connect one bone to another. The four ligaments of the knee connect the upper leg bone (femur) to the lower leg bone (tibia) and stabilize knee movement.

  • The anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL) cross inside the center of the knee joint and stabilize front-to-back knee movements.
  • The medial collateral ligament (MCL) and the lateral collateral ligament (LCL) connect the leg bones at the sides of the knee and stabilize side-to-side movements.

Current as of: May 1, 2025

Author: Ignite Healthwise, LLC Staff

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All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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