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Multiple sclerosis (MS) is a disease of the central nervous system characterized by the destruction of the [[myelin]] sheath surrounding neurons, resulting in the formation of "plaques."  

[[Multiple sclerosis]] (MS) is a disease of the central nervous system characterized by the destruction of the [[myelin]] sheath surrounding neurons, resulting in the formation of "plaques."  

MS is a progressive and usually fluctuating disease with exacerbations (patients feeling worse) and remissions (patients feeling better) over many decades. Eventually, in most patients, remissions do not reach baseline levels and permanent disability and sometimes death occurs.  

MS is a progressive and usually fluctuating disease with exacerbations (patients feeling worse) and remissions (patients feeling better) over many decades. Eventually, in most patients, remissions do not reach baseline levels and permanent disability and sometimes death occurs.