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Based on their investigation involving 62 older, cognitively healthy adults, researchers from the University of California Berkeley, Stanford University, and UC Irvine in the US found individuals with brain changes associated with Alzheimer's performed better on memory function tests as they got more deep sleep.
Those with similar Alzheimer's-linked changes who failed to get as much deep sleep didn't fare quite as well on the same tests.Taken together, the results, which were published in May this year, imply having a generous amount of solid shut-eye could help support the decline in memory that sets in as dementia begins to take hold.
Even so, levels of amyloid-beta proteins are commonly used as a marker of Alzheimer's disease, as research suggests they – andPast research from Walker's group found significant levels of amyloid-beta aggregating in the brains of older adults can disrupt deep sleep – also known as non-rapid eye movement slow wave sleep – and
Among those whose brain scans revealed similarly high levels of beta-amyloid deposits, getting a good night's sleep seemed to make a critical difference in cognitive function. This effect was only seen when the researchers looked specifically at non-rapid eye movement slow wave sleep, and not at other sleep wave frequencies or sleep stages.
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