Does m.s. only attack the central nervous system?

Yes: Multiple sclerosis (ms) is an autoimmune disease (body's defense system attacking itself) that involves the central nervous system. Central nervous is composed of the brain and spinal cord. Myelin sheaths protect and insulate nerve cells; in ms the myelin sheaths on the axons (longer parts of the nerve cells) are inflamed and damaged, leading to scar development seen in white matter of the brain.

Yes: MS involves brain, spinal cord, and visual system. Has no direct attack on other organ systems.