Read the following question and then pick a category that describes the question.
Question: What is the name of the chronic neurological autoimmune disease which attacks the protein sheath that surrounds nerve cells causing a gradual loss of movement in the body ?
What category is the question in? Choose one from Abbreviation, Entity, Description and abstract concept, Human being, Location, Numeric value. Respond with only the category and no additional text.
Entity
Description and abstract concept.