Task: Translation
Input (Japanese): 多発性硬化症は、身体が神経が電気信号を運ぶのを助ける脂肪ミエリンを攻撃する中枢神経系の自己免疫性疾患であり、障害に至り得る筋力低下と痙攣の原因となる。
Output (English): MS is an autoimmune disease of the central nervous system where the body attacks the fatty myelin which helps nerves carry electrical signals, causing muscle weakness and spasming which may lead to disability.