 it actually starts attacking these myelin sheaths, the covering of the nerves, and damaging of the covering of the nerves. Think about what would happen to wires. The wires would start crossing and short each other, and that's exactly what happens in the nervous system. You lose the insulation around nerves, the nerves start touching each other, they short out each other, and things just don't work properly in the brain or the spinal cord.