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Plaques located in the gray matter of the brain are key indicators of Alzheimer's disease. Cecil Fox/Science Source hide caption

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Cecil Fox/Science Source

Scientists Push Plan To Change How Researchers Define Alzheimer's

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Finding some change in the blood of an Alzheimer's patient that accurately reflects the damaging changes in the brain has been tough. utah778//iStockphoto/Getty Images hide caption

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utah778//iStockphoto/Getty Images

New research finds that African-Americans who grow up in harsh environments and endure stressful experiences are much more likely to develop Alzheimer's or some other form of dementia. Leland Bobbe/Getty Images hide caption

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Leland Bobbe/Getty Images

Stress And Poverty May Explain High Rates Of Dementia In African-Americans

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Tennessee Head Coach Pat Summitt of Tennessee celebrates with her son Tyler after the Lady Volunteers defeated Georgia in the championship game of the NCAA Women's Final Four in 1996. Matthew Stockman/Getty Images hide caption

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Matthew Stockman/Getty Images