Researchers have uncovered part of the explanation for why poor sleep is linked to Alzheimer's disease. They found that older people who have less slow-wave sleep -- the deep sleep you need to consolidate memories and wake up feeling refreshed -- have higher levels of the brain protein tau. Elevated tau is a sign of Alzheimer's disease and has been linked to brain damage and cognitive decline.
from Healthy Aging News -- ScienceDaily http://bit.ly/2SHbyrX
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