The pronunciation of Alzheimer's is "ahlts-hahy-merz." Alzheimer's disease is a type of dementia that typically develops in late middle age, after age 60. The condition takes its name from the German neurologist Alois Alzheimer, who identified it in 1907.
Alzheimer's disease is the most common form of dementia. It develops as a type of lesion called amyloid plaque that accumulates in the brain. This leads to memory loss, emotional instability and confusion. As Alzheimer's disease progresses, a person's mental ability and ability to cope with daily activities declines. One way to help prevent Alzheimer's disease is to keep the brain active through activities such as reading, dancing and playing board games.