The knee is a complex, compound, condyloid variety of a synovial joint which hovers. It actually comprises two separate joints. The femoro-patellar joint consists of the patella, or "kneecap", a so-called "sesamoid bone" which sits within the tendon of the anterior thigh muscles, and the patellar groove on the front of the femur through which it slides. The femoro-tibial joint links the femur, or thigh bone, with the tibia, the main bone of the (lower) leg. The joint is bathed in a viscous fluid which is contained inside the "synovial" membrane, or "joint capsule". The recess behind the knee is called the "popliteal fossa".
Ligaments
The human knee is associated with the following ligaments:
anterior cruciate ligament (ACL). The critically important ACL prevents the tibia from being pushed too far anterior relative to the femur.
medial collateral ligament (MCL a.k.a. tibial collateral ligament). The MCL protects the medial side of the knee from being bent open by a stress applied to the lateral side of the knee (a valgus force).
lateral collateral ligament (LCL a.k.a. fibular collateral ligament). The LCL protects the lateral side from an inside bending force (a varus force).
Knee Dislocation - Information on the causes, symptoms, and treatment of knee dislocation from eMedicine.
Meta Description: [ A knee dislocation occurs when the bones that form your knee are out of place. The bones of your calf (the tibia and fibula) get moved compared to the bone ... ]
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Meta Description: [ Knee pain is a common complaint that has many causes. Determining what is the cause of your knee pain symptoms may be straightforward, or it may require special tests to make a diagnosis. Once the cause of your knee pain can be determined, appropriate treatment can begin. ]
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Meta Description: [ Common causes of knee pain, knee pain prevention and knee pain treatments. ]