NCIt definition : A progressive autoimmune disorder affecting the central nervous system resulting in
demyelination. Patients develop physical and cognitive impairments that correspond
with the affected nerve fibers.;
Alternative definition : NICHD: An autoimmune demyelinating disease characterized by a relapsing-remitting
or progressive pattern of central nervous system impairment.; NCI-GLOSS: A disorder of the central nervous system marked by weakness, numbness,
a loss of muscle coordination, and problems with vision, speech, and bladder control.
Multiple sclerosis is thought to be an autoimmune disease in which the body's immune
system destroys myelin. Myelin is a substance that contains both protein and fat (lipid),
serving as a nerve insulator and helping in the transmission of nerve signals.;