
In Alzheimer's disease, deposits of proteins called amyloid and TAU distort communication between brain cells. Also, levels of a chemical called acetylcholine that helps transmit messages between brain cells begin to drop, causing more communication problems. Eventually, brain cells themselves are affected. They begin to shrivel and die, causing certain areas of the brain to shrink.
Alzheimer's disease is the most common cause of dementia, accounting for 50% to 67% of all cases in people aged 65 and older. Approximately 4 million people in the United States currently have the disease.
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