Which ligament resists anterior movement of the tibia in the knee?

Which ligament resists anterior movement of the tibia in the knee?

• A. PCL
• B. ACL
• C. MCL
• D. LCL

Answer: (B)

The anterior cruciate ligament (ACL) is responsible for resisting anterior movement of the tibia relative to the femur during knee motion. When the knee is subjected to forces that attempt to move the tibia forward, the ACL contracts and stabilizes the joint by limiting this movement. This is crucial in activities that involve sudden changes in direction, pivoting, or stopping, as these actions can place significant stress on the knee. The other ligaments mentioned serve different functions. The posterior cruciate ligament (PCL) primarily prevents backward movement of the tibia. The medial collateral ligament (MCL) provides stability against forces that would push the knee inward, and the lateral collateral ligament (LCL) does the opposite by stabilizing against outward forces. Therefore, while all these ligaments contribute to the overall stability of the knee, the ACL's specific role in limiting anterior tibial translation is what makes it the correct answer for this question.

The anterior cruciate ligament (ACL) is responsible for resisting anterior movement of the tibia relative to the femur during knee motion. When the knee is subjected to forces that attempt to move the tibia forward, the ACL contracts and stabilizes the joint by limiting this movement. This is crucial in activities that involve sudden changes in direction, pivoting, or stopping, as these actions can place significant stress on the knee.

The other ligaments mentioned serve different functions. The posterior cruciate ligament (PCL) primarily prevents backward movement of the tibia. The medial collateral ligament (MCL) provides stability against forces that would push the knee inward, and the lateral collateral ligament (LCL) does the opposite by stabilizing against outward forces. Therefore, while all these ligaments contribute to the overall stability of the knee, the ACL's specific role in limiting anterior tibial translation is what makes it the correct answer for this question.