Multiple sclerosis causes
Multiple sclerosis remains a mysterious and unknown disease. Scientists refer this to a group of autoimmune diseases. This means that the human immune system has shown no aggression to the alien factors (bacteria, viruses, etc.) but to its own tissues (nerves myelinic shells), causing them to be damaged.
During the exacerbation of the disease in the brain white matter appear centers of demyelization (i.e, deprived of myelin) and inflammation. The important point is that remission occurs even against the backdrop of powerful anti-treatment, or ever self restoration of myelin. This attenuation process is kept until the next exacerbation.
In addition to white matter, affect other tissues: gray matter (nerve cell bodies) and nerve fibers (inside myelin). Their defeat is happening on another mechanism: tissue gradually fade and quickly became old. This process is constant, not only during the exacerbation.