polyneuropathy AE demyelinating polyneuropathy AE JX, YH 10061811 a polyneuropathy AE that arises when the myelin sheaths around nerve cells are damaged. Myelin, the insulating layer of tissue that surrounds nerve cells, helps ensure that signals from the brain are rapidly transmitted to the proper places in the body. When myelin is damaged or destroyed, it can lead to problems with communication between the brain and the body. WEB: http://www.healthgrades.com/conditions/chronic-inflammatory-demyelinating-polyneuropathy