Knee joint is the most important joint in human body. Once there is a problem with our knee joint, it will have a great impact on our life. Once there is a problem with the knee joint, it will have a great impact on our lives and will also cause pain to the body. For example, when going up and down stairs or squatting, the knee joint will be very painful. Only after a period of rest can some symptoms be alleviated, and even the knee joint is stiff and deformed.

Especially when there is obvious pain and swelling in the joints, rest should be given priority to, activities such as going up and down stairs and running should be avoided, and crutches should be used when walking to reduce the joint burden. When the joint pain and swelling are obviously improved, it is suitable to do the above exercise, and it is best to do it under the formal guidance of a rehabilitation doctor.

The synovial layer of the knee joint is the widest and most complicated in the whole body joint, which is attached to the periphery of the articular surface of each joint bone and covers all the structures in the joint except articular cartilage and meniscus.

The synovium is located above the upper edge of the patella and protrudes upward, forming a suprapatellar capsule about 5cm deep between the quadriceps tendon and the lower part of the femoral body. On both sides of the midline below the patella, part of the synovial layer protrudes into the joint cavity, forming a pair of wing folds, which contain adipose tissue and fill the joint cavity space. There are also synovial bursas that do not communicate with the joint cavity, such as the deep infrapatellar bursa between the patellar ligament and the upper end of the tibia.

the main ligament

The main ligament is the joint capsule of the knee joint, which is thin and loose, attached to the periphery of each joint surface and reinforced by ligament to increase the stability of the joint.

Patellar ligament

It is the central fibrous cord of quadriceps femoris tendon, which runs down from patella to tibial tuberosity. The patellar ligament is flat and strong, and its superficial fibers pass through the patella and are connected with the quadriceps femoris tendon.

Collateral ligament of fibula

It is a tough fiber rope, starting from the lateral epicondyle of femur and extending down to the fibular head. Most of the ligament surface is covered by biceps femoris tendon, which is not directly connected with the lateral meniscus.