A lack of deep sleep could indicate Alzheimer's development

Researchers from the Washington University School of Medicine in St. Louis, MO, found that older people who experience less slow-wave sleep (in other words, deep sleep) have elevated levels of a brain protein called tau.

The findings, published in Translational Medicine, note that higher levels of tau are a sign of Alzheimer's disease.

Elevated levels have also previously been associated with both brain damage and cognitive decline.

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