Cruciate ligaments described as 'cross' are associated with which joint?

• A. Knee
• B. Shoulder
• C. Elbow
• D. Hip

Answer: (A)

Cruciate ligaments get their name from crossing each other inside the joint. In the knee, the two main cruciate ligaments—the anterior cruciate and the posterior cruciate—run in opposite directions and cross within the knee, forming an X. This crossing arrangement is what gives they’re “cross” ligaments their distinctive role: they stabilize the knee by controlling the forward and backward movement of the shin relative to the thigh. The ACL prevents the tibia from sliding too far forward, while the PCL prevents it from sliding too far backward. Because this crossing pattern is a defining feature of the knee joint, cruciate ligaments described as cross are associated with the knee. Other joints like the shoulder, elbow, and hip have important ligaments too, but they don’t feature this crossing arrangement inside the joint.