Question

What are the arthrokinematic motions during closed-chain knee extension?

A. Femoral surface rolls anteriorly, slides posteriorly, and rotates medially.
B. Tibial surface rolls anteriorly, slides posteriorly, and rotates medially.
C. Femoral surface rolls posteriorly, slides anteriorly, and rotates laterally.
D. Tibial surface rolls and slides anteriorly and rotates laterally.

Answer 1

During closed-chain knee extension, the C. femoral surface rolls posteriorly, slides anteriorly, and rotates laterally. The tibial surface rolls and slides anteriorly during knee extension. These motions allow for proper movement and stability of the knee joint.

Step-by-step explanation:

During closed-chain knee extension, the femoral surface rolls posteriorly, slides anteriorly, and rotates laterally.

This motion is necessary to unlock the knee and initiate flexion. On the other hand, the tibial surface rolls and slides anteriorly while the knee extends.

These arthrokinematic motions ensure proper movement and stability of the knee joint.