[Quiz]: Test Your Knowledge About Multiple Sclerosis

1. Multiple Sclerosis Is an Autoimmune Disorder

True Most experts believe that MS is an autoimmune disorder in which the immune system attacks the myelin sheath that normally protects nerve fibers in the brain, spinal cord, and optic nerve. In an autoimmune disease, the immune system mistakenly reacts against a self-antigen, which is a normal protein or cell marker that should not provoke such a response.

In the case of MS, researchers still don’t know what self-antigen triggers the immune system response. Some experts refer to MS as an “immune-mediated” disease but stop short of classifying it as an autoimmune disease.

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