Which of the following best describes the ligament(s)that provide(s)the most resistance to tensile forces in 30° of closed kinetic chain flexion of the tibiofemoral joint?
A) Anterior cruciate ligament (ACL)
B) ACL and posterior cruciate ligament (PCL)
C) Medial collateral ligament (MCL)and lateral collateral ligament (LCL)
D) PCL,MCL,and LCL

Question

Quizplus · Accepted Answer

At 30° of closed kinetic chain flexion of the tibiofemoral joint, both the ACL and PCL provide significant resistance to tensile forces. The MCL and LCL provide more stability to the knee in the coronal plane and are not as significant in resisting tensile forces in flexion. The PCL, MCL, and LCL all play important roles in knee stability but the ACL is the primary restraint to anterior displacement of the tibia on the femur. Therefore, B is the best choice as it includes the ACL which is the main ligament responsible for resisting tensile forces in the given position.

Which of the Following Best Describes the Ligament(s)that Provide(s)the Most