According to Merriam-Webster, Alzheimer’s is defined as “a degenerative brain disease of unknown cause that is the most common form of dementia, that usually starts in late middle age or in old age, that results in progressive memory loss, impaired thinking, disorientation, and changes in personality and mood, and that is marked histologically by the degeneration of brain neurons especially in the cerebral cortex and by the presence of neurofibrillary tangles and plaques containing beta-amyloid.”
Please watch this three minute depiction of the process of Alzheimer’s disease: Alzheimer’s Disease Process
Auguste Deter was the first person to be diagnosed with Alzheimer’s. Other celebrities who have suffered from this disease include: Glenn Campbell, Pat Summit, Perry Como, Charles Bronson, Charlton Heston, Norman Rockwell, Rita Hayworth, Sugar Ray Robinson, Aaron Copeland, Burgess Meredith, Estelle Getty, Peter Falk, and Ronald Reagan.