Alpers Disease

Canavan Disease

Demyelinating Diseases

Multiple Sclerosis - A disease of the brain and spinal cord caused by an unknown agent that gradually destroys the myelin covering, or sheath, of nerve fibres, resulting in a temporary interruption or disordered transmission of nerve impulses, particularly in pathways concerned with vision, sensation, and the use of limbs. The patches of demyelinated nerve tissue produced by the disease eventually may disrupt impulse transmission to the point of permanent paralysis.