- A degenerative process that erodes away the myelin sheath that normally protects nerve fibers. Demyelination exposes these fibers and appears to cause problems in nerve impulse conduction that may affect many physical systems. Demyelinization is seen in a number of diseases, particularly multiple sclerosis. Diagnosis is by functional observation and by testing for myelin protein in the blood.
* * *de·my·eli·na·tion (.)dē-.mī-ə-lə-'nā-shən n the state resulting from the loss or destruction of myelin also the process of such loss or destruction
* * *n.damage to the myelin sheaths surrounding the nerve fibres in the central or peripheral nervous system. This in turn affects the function of the nerve fibres, which the myelin normally supports. Demyelination may be a primary disorder, as in multiple sclerosis. There may be associated nerve-fibre damage.
* * *de·my·elin·a·tion (de-mi″ə-lĭn-aґshən) destruction, removal, or loss of the myelin sheath of a nerve or nerves. Called also demyelinization and myelinolysis.
Medical dictionary. 2011.