Ligament - Joint Stability is Aided by These Structures

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A ligament is a structure that connects two bones. The junction of two bones is called a joint. Surrounding your joints are ligaments that hold the bones together, but provide enough flexibility to allow the joint to move.

Every joint has a number of ligaments that surround the joint, some of which provide most of the stability to the joint.  For example, the knee joint has four primary ligaments that provide most of the support to the joint.

  These ligaments are:

  1. Anterior cruciate ligament (ACL)
  2. Posterior cruciate ligament (PCL)
  3. Medial collateral ligament (MCL)
  4. Lateral collateral ligament (LCL)

There are also numerous other ligaments, but these are considered the primary stabilizing ligaments of the knee joint, and the ligaments most commonly investigated as possible causes of knee joint instability.

Ligament Injuries

When a joint is injured, ligaments can be torn. Common ligament injuries include ankle sprains, ACL tears, and shoulder dislocations. People with generally loose ligaments are often called 'double jointed,' and some conditions can cause people to have severely loose ligaments.

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