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The greatest displacement of the meniscus is caused by external rotation, while internal rotation relaxes it. [1] During rotational movements of the tibia (with the knee flexed 90 degrees), the medial meniscus remains relatively fixed while the lateral part of the lateral meniscus is displaced across the tibial condyle below. [2]
This complex is the major stabilizer of the medial knee. Injuries to the medial side of the knee are most commonly isolated to these ligaments. [1] [3] A thorough understanding of the anatomy and function of the medial knee structures, along with a detailed history and physical exam, are imperative to diagnosing and treating these injuries.
This is a combined cleavage and compression fracture and involves vertical split of the lateral condyle combined with depression of the adjacent load bearing part of the condyle. Caused by a valgus force on the knee; it is a low energy injury, typically seen in individuals of the 4th decade or older with osteoporotic changes in bone.
There are two menisci in the knee. They sit between the thigh bone and the shin bone. While the ends of the thigh bone and the shin bone have a thin covering of soft hyaline cartilage, the menisci are made of tough fibrocartilage and conform to the surfaces of the bones they rest on. One meniscus rests on the medial tibial plateau; this is the ...
These injuries are associated with diving injuries, falls and car accidents. [18] Anterior compression vector results in mild height loss, whereas hyper-extension often occurs with the posterior displacement of the head in car crashes. [18] Severe hyper-extension injury leads to pinching of the spinal cord along the posterior margin of the body ...
Symptoms include pain, swelling, and bruising to the front of the knee. [1] A person may also be unable to walk. [1] Complications may include injury to the tibia, femur, or knee ligaments. [2] It typically results from a hard blow to the front of the knee or falling on the knee. [1] The patella can also be fractured indirectly.
The components of each of these compartments can experience repetitive strain, injury or disease. [1] Running long distance can cause pain to the knee joint, as it is a high-impact exercise. [2] The location and severity of knee pain may vary, depending on the cause of the problem. Signs and symptoms that sometimes accompany knee pain include: [1]
In chronic injuries, patients sometimes learn to walk with a partially flexed knee to alleviate the instability caused by their injury. Patients with medial compartment arthritis can also demonstrate a varus thrust gait, so it is important to differentiate between the two causes using plain radiographs. [ 22 ]