(CNN)Here is a look at Alzheimer's disease, a progressive brain disorder that leads to loss of memory and other intellectual abilities.
Alzheimer's disease is the most common form of dementia, which is a general term for the loss of memory and intellectual abilities.
Age - The likelihood of developing Alzheimer's doubles every five years after the age of 65. For most people, symptoms first appear after the age of 60.
Repeating questions and statements
Mood and personality changes
Delusions and paranoia
According to the CDC, an estimated 5.7 million Americans have Alzheimer's disease. About two-thirds of that number are women