Answer:
Multiple sclerosis is caused by damage to the myelin sheath, the protective covering that surrounds nerve cells. When this nerve covering is damaged, nerve impulses are slowed down or stopped. Multiple Sclerosis is caused by damage to the myelin sheath, the protective covering that surrounds nerve cells. When this nerve covering is damaged, nerve impulses are slowed down or stopped.
Researchers are not sure what triggers the inflammation. The most common theories point to a virus or genetic defect, or a combination of both.
Multiple Sclerosis is more likely to occur in northern Europe, the northern United States, southern Australia, and New Zealand than in other areas. Geographic studies indicate there may be an environmental factor involved.