Final answer:
The statement regarding the two co-lateral ligaments in the knee preventing side to side movement is true. These ligaments provide critical stability to the knee by preventing excessive lateral or rotational movements, especially when the knee is fully extended.
Step-by-step explanation:
The statement that the two co-lateral ligaments in the knee prevent side to side movement is true. The knee joint is supported by multiple ligaments that contribute to its stability and prevent excessive movements. The tibial collateral ligament (medial collateral ligament) and the fibular collateral ligament (lateral collateral ligament) are extrinsic ligaments located outside of the articular capsule. They are critical in stabilizing the knee against undue side-to-side or rotational motions between the femur and tibia. The tibial collateral ligament runs from the medial epicondyle of the femur to the medial tibia, while the fibular collateral ligament spans from the lateral epicondyle of the femur to the head of the fibula. In the fully extended position, these ligaments are taut, providing support and preventing rotational movements as well as side-to-side instability. This understanding is essential when considering knee injuries and their treatments.