Movement System Impairment Syndrome
Movement system impairment (MSI) syndromes are proposed to result from the repetitive use of alignments and movements that over time become impaired and eventually induce pathoanatomical changes in tissues and joint structures.
The key concept is that the body, at the joint level, follows the laws of physics and takes the path of least resistance for movement. The result of a joint moving more readily in a specific direction is the development over time of hypermobility of accessory motion or micro-instability. The micro-instability causes tissue microtrauma that with repetition can become macrotrauma.