Some 2.3 million of U.S. adults older than 65 — more than 4% — have a diagnosis of dementia. But even without a diagnosis, a certain amount of cognitive decline is normal as age sets in.

Researchers have created a highly detailed cellular map of Alzheimer’s disease progression, revealing new insights into the ...

Dementia describes symptoms like memory loss in multiple diseases, and Alzheimer’s is the most common form. Here are the key ...