valgusmoment

Valgusmoment, also known as the valgus torque or valgus stress, refers to the external force or moment applied to a joint that causes it to move outward or laterally, typically resulting in the inward angulation of the distal segment relative to the proximal segment. The term is most commonly used in relation to the knee joint, where a valgus moment pushes the lower leg outward relative to the thigh, stressing the medial collateral ligament (MCL) and other medial structures.

In biomechanics and orthopedics, valgus moments play a significant role in the mechanics of joint stability and injury risk. Excessive or repetitive valgus loading can lead to ligamentous injuries, cartilage damage, or joint instability. For example, in sports medicine, valgus moments are often associated with anterior cruciate ligament (ACL) injuries, particularly when combined with rotational forces.

Valgus moments can be generated during activities that involve sudden changes in direction, landing from jumps, or improper movement patterns. They are of interest in the diagnosis, treatment, and prevention of joint injuries. Rehabilitation programs frequently focus on strengthening muscles that stabilize the joint against valgus stresses, such as the hip abductors and the quadriceps.

Assessment of valgus moments typically involves motion analysis and modeling, as well as torque measurements during dynamic activities. Understanding the mechanics of valgus movements is crucial for designing injury prevention strategies and optimizing performance in athletes, as well as for clinical management of joint pathologies.