It looks like you are using an older version of Internet Explorer which is not supported. We advise that you update your browser to the latest version of Microsoft Edge, or consider using other browsers such as Chrome, Firefox or Safari.

Your nerve fibers come equipped with a protective coating called myelin that helps transmit messages from your brain to the rest of your body. Demyelination is a degenerative process that erodes this protective coating, making nerve impulses slow or grind to a halt.