A doctor named Alois Alzheimer...
Alzheimer's disease was named after German psychiatrist and neuropathologist Aloïs Alzheimer (1864-1915) who first studied the disease at the beginning of the 20th century.
In 1901, he faced the case of Auguste Deter, a 51 years old woman experiencing memory and speech troubles, among other problems. The case was familiar for Dr. Alzheimer who previsouly met patients with dementia, but no one as young as Ms Deter.
Dr. Alzheimer followed the case of this patients for 5 years until she passed away. He then performed a brain autopsy to discover two abnormalitie that will become the landmarks of this disease: amyloid plaques and neurofibrillary tangles.