MS is a chronic, inflammatory disease of the central nervous system [CNS], which is the brain and spinal cord. Many physicians believe that MS is an autoimmune disease. This term refers to a group of diseases in which the immune system goes awry and attacks certain tissues of the body. The cause of MS is unknown, but viral infection has been considered as a possible triggering factor. The end result, it seems, is that components of the immune system target the myelin sheath covering the nerve fibers of the CNS, leaving plaques or lesions on the myelin, which is an important fatty substance. Indeed, the name multiple sclerosis refers to the multiple patches of scar tissues appearing on the nerve fibers. Myelin shields certain nerve fibers, providing a form of electrical insulation. So when myelin breaks down, electrical impulses may be completely blocked, or they may short-circuit to adjacent nerves, producing an abnormal impulse. And because damage can occur anywhere in the CNS, no t...
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