Multiple sclerosis = demyelination?

Characteristic: Demyelination refers to damage to the coverings of the nerves in the brain and spinal cord, and is very characteristic of the inflammatory process that occurs in ms. This can also occur in children with hereditary leukodystrophies, and can be associated with acquired neurological disorders. The disease modifying drugs in MS are designed to control demyelination and many work well.

Yes: The nerve covering, myelin, in the central nervous system gets attacked.