Alzheimer’s disease is the most common type of dementia, affecting up to 70% of all dementia sufferers. Dr. Alois Alzheimer was the first to record it in 1907. Auguste Deter, a middle-aged woman with dementia and particular alterations in her brain, was profiled by Dr. Alzheimer. Alzheimer’s disease was regarded as a rare disease affecting people under the age of 65 for the following 60 years. Dr. Robert Katzman did not declare (very boldly at the time) that “senile dementia” and Alzheimer’s disease were the same disorder and that neither was a normal part of aging until the 1970s.
Alzheimer’s disease can run in families or be sporadic.
Alzheimer’s disease can strike humans at any age, but it is most frequent after the age of 65 and is the most common form of the disease.
A mutation in one of multiple genes causes familial Alzheimer’s disease, which is an extremely rare hereditary disorder. The existence of altered genes indicates that the person would get Alzheimer’s disease at some point in their lives, usually in their 40s or 50s.