Knee Biomechanics Quiz

Content Overview

• The language at the beginning of the page is Arabic.
• The title of the content is not specified but related to meniscal injuries and knee anatomy.
• The author of the content is not provided.

Meniscus Injury Details

• The number 76 may signify a specific point of reference or a classification relating to meniscal injuries, likely relevant in medical texts or studies.
• Twisting injuries are commonly attributed to axial forces acting on the knee, particularly during sports.
• The meniscal injury primarily occurs in the knee region, specifically in the medial or lateral meniscus.
• The injured cartilage structure is identified as the meniscus.

Knee Position and Movement

• Twisting injuries typically happen when the knee is in a flexed position, often during rotation of the body while the foot remains planted.
• The ligament resists excessive movement during knee function, providing stability during dynamic activities.
• During knee flexion, the Lateral Collateral Ligament (LCL) experiences tension but is not torn.
• In the absence of the Anterior Cruciate Ligament (ACL), the LCL provides support against lateral movement.

Ligament Functions and Reactions

• The ligament primarily resists varus stresses, which are inward forces causing the knee to buckle.
• Falling on a flexed knee can lead to damage in the patellar region and potential meniscal tears.
• The Medial Collateral Ligament (MCL) functions to stabilize the knee against valgus stresses.
• During knee flexion, the MCL remains taut, protecting the joint from excessive lateral forces.

Causes and Mechanics of Injury

• A violent extension meniscal injury may occur due to abrupt stopping, changes in direction, or hyperextension of the knee.
• The two collateral ligaments of the knee joint are the Medial Collateral Ligament (MCL) and the Lateral Collateral Ligament (LCL).
• Valgus stress is likely caused by external forces applied on the lateral side of the knee.
• During knee flexion, the ACL is typically more relaxed compared to its taut position during extension.

Ligament Locations and Consequences

• The MCL is located on the inner side of the knee, while the LCL is found on the outer side.
• A direct hit to the lateral side of the knee can result in injury to the MCL and potentially lead to instability in the joint.