About Memory and Dementia
The definition of Alzheimer's is changing in response to growing research on normal aging. By studying the brain tissue of normal adults, researchers have determined that Alzheimer's disease likely starts decades before the symptoms of the disease are recognized.
In fact, it is hypothesized that the disease actually begins in the third, fourth or fifth decade of life. What used to be considered a disease of advanced age is now viewed as a disease that develops across the lifespan. Read more about its diagnosis and treatment.