What is the knee meniscus

The meniscus is a 2-crescent-shaped fibrocartilage located on the articular surfaces medial and lateral to the tibial plateau. Its cross-section is triangular, thick on the outside and thin on the inside, slightly concave above so as to coincide with the femoral condyle, and flat below, which meets the tibial plateau. Such a structure happens to cause the femoral condyle to form a deep depression on the tibial plateau, thus increasing the stability of the spherical femoral condyle and tibial plateau.

The anterior and posterior ends of the meniscus are attached to the non-articular surface of the middle of the tibial plateau, anterior to and posterior to the intercondylar spines, respectively. This area is also called the anterior and posterior horns of the meniscus.

It is caused by a torn meniscus.

Extended information] There are medial and lateral half-moon shaped bones on the tibial articular surface, called meniscus, whose margins are thicker, closely connected with the joint capsule, and the center is thin and free. Except for partial marginal damage, which can be repaired on its own, the meniscus cannot be repaired after a rupture, and after meniscus resection, a thin, narrow fibrocartilaginous meniscus can be regenerated from the synovium. The normal meniscus has the effect of increasing the tibial condyle depression and padding the medial and external femoral condyles to increase the stability of the joint and act as a cushion**.

Western medicine name: meniscus, Chinese medicine name, bone paralysis, foreign name: meniscus [m'N SK S] alias knee cartilage belongs to the Department of Surgery - OrthopedicsCommon Incidence SitesCommon Symptoms of Knee JointsPain, Inability to Flex and Extend, etc., Swelling Common**Excessive Exercise, Strong Physical Labor or Exercise-Frequent Groups, Leg Exercise Groups.

The meniscus is made up of fibrocartilage, one inside and one on the outside, located in the joint space of the knee joint. The anterior portions of the medial and lateral meniscus are connected to the transverse knee ligament. The structure of the meniscus is semi-annular, thicker on the periphery, thin and sharp on the inner margin, concave above, adapted to the femoral condyle, and flat below, adapted to the tibial plateau.

Because of the presence of the meniscus, the knee joint is divided into two groups: femoral-meniscus and meniscus-tibia. The meniscus is mainly attached to the tibia, but it can move with the femur to a certain extent, and its morphological characteristics can compensate for the discomfort between the tibial condyle and the femoral condyle, increase the stability of the joint, and avoid the surrounding soft tissues being squeezed into the joint. The color of the meniscus is grayish-white, smooth and shiny, tough and has a certain elasticity, which can cushion the impact of the two bone surfaces, absorb **, disperse synovial fluid, increase lubrication, reduce friction, and protect joints.

Meniscus Blood**:

Blood from the meniscus** comes from branches of the internal and external knee arteries, which form a network of blood vessels within the joint capsule. These arterial nets from the joint capsule and synovium provide blood vessels to only 10% to 30% of the fibers around the meniscus periphery, which is called the red zone arthroscopically and can be repaired after the injury. **There is no blood vessel, so it is called the white zone, which is nourished by the penetration of synovial fluid, so it lacks the ability to repair and regenerate after injury.

When the knee is straightened, the meniscus is pushed forward by the femoral condyle and posteriorly when the knee is flexed. When the knee rotates, the meniscus is one forward and one backward. In knee flexion and extension, the medial and medial femoral condyles move above the meniscus, and when the knee rotates, the meniscus is fixed below the medial and medial malleolus, and its rotation occurs between the meniscus and the tibial plateau.

Therefore, the rupture of the meniscus mostly occurs under the plate, and rotational activity is the main cause of the meniscus rupture.