![]() The scientists looked at roughly 350 participants enrolled in the Framingham Heart Study - a long-term, multigenerational American research project - who completed two overnight sleep studies as part of the research.ĭuration 11:49 Back in 2005, Canadians averaged about eight hours of sleep a night. "But whether or not they could sustain that over many years, I think the answer to that question would be no."Ī growing body of research points to clear links between deep sleep and memory formation and, on the flip side, the possibility of dire consequences when someone's sleep quality erodes over time.Ī new paper published in JAMA Neurology found even a one per cent reduction in deep sleep each year in individuals aged 60 and up was associated with a significantly higher risk of developing dementia. "It can be a couple of years of pretty serious sleep loss, and they still push through," said John Peever. Take new parents for instance, says a sleep scientist affiliated with the Canadian Institutes of Health Research. In the short-term, those cognitive hiccups are usually manageable. And anyone who's endured back-to-back nights of sub-par slumber likely knows the result: Feelings of brain fog, grogginess or even memory issues. There are a host of reasons why people have periods of poor sleep. ![]() Menopausal women tossing and turning in bed from hot flashes. If you haven't subscribed yet, you can do that by clicking here. This story is part of CBC Health's Second Opinion, a weekly analysis of health and medical science news emailed to subscribers on Saturday mornings.
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