1 Multiple sclerosis (MS) is a disease that causes demyelination (disruption of the myelin that insulates and protects nerve cells) of spinal nerve and brain cells.  Although the exact case is unknown, multiple sclerosis is considered to be an autoimmune disease.
The skunk is not a rodent. They belong to the family Mephitidae and the order Carnivora which does not include rodentia. They are sometimes placed in the family Mustelidae (weasels) but have been discovered to be less related than was thought.
Full Definition of SKUNK. 1. a: any of various common omnivorous black-and-white New World mammals (especially genus Mephitis) of the weasel family that have a pair of perineal glands from which a secretion of pungent and offensive odor is ejected b: the fur of a skunk. 2. : an obnoxious or disliked person.