According to the involved area and illness course, MND can be divided into several types, but amyotrophic lateral sclerosis(ALS) and progressive muscular atrophy(PMA) are the main types.

• 根据病变累及部位及病程可分为许多类型，其中最主要的有肌萎缩侧索硬化（Amyotrophic lateralsclerosis，ALS）和进行性脊肌萎缩症（Progressive muscular atrophy，PMA）。