Multiple Sclerosis (MS) is a disorder of the brain and spinal cord. It can cause a variety of clinical symptoms. In most cases, the first episodes of symptoms can last for a long time.

Multiple sclerosis is a chronic disease that damages the nerves of the spinal cord and brain, as well as the optic nerves. Sclerosis means scarring, and people with multiple sclerosis develop areas of scar tissue in response to nerve damage.