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x3 Have researchers found 'ground zero' for Alzheimer's?

from CBS

From Feb. 23: A small region deep in the brain might be "ground zero" for Alzheimer's disease, suggest the authors of a new review of scientific literature. It's still early to know for sure, though. University of Southern California researchers said that the locus coeruleus — a little blue area of the brain stem — releases a chemical called norepinephrine that helps regulate heart rate, attention, memory, and cognition. It may also help prevent Alzheimer's symptoms by protecting brain cells, called neurons, from factors such as inflammation that may hasten the onset of dementia. more

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