Since1906, whenGerman physician Alois Alzheimer described the degenerative brain disorder bearing his name, doctors have argued about what exactly causes the disease.

• 自德国医生阿洛斯·阿耳茨海默1906年描述那后来以他的名字命名的早老性痴呆症以来,医生们一直未能就该病的起因达成一致意见。