Drudge Retort: The Other Side of the News
Monday, June 10, 2024

The risk of getting dementia may go up as you get older if you don't get enough slow-wave sleep. Over-60s are 27 percent more likely to get dementia if they lose just 1 percent of this deep sleep each year, a 2023 study found.



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More from the article...

... Slow-wave sleep is the third stage of a human 90-minute sleep cycle, lasting about 20"40 minutes. It's the most restful stage, where brain waves and heart rate slow and blood pressure drops.

Deep sleep strengthens our muscles, bones, and immune system, and prepares our brains to absorb more information. In 2023, research discovered that individuals with Alzheimer's-related changes in their brain did better on memory tests when they got more slow-wave sleep.

"Slow-wave sleep, or deep sleep, supports the aging brain in many ways, and we know that sleep augments the clearance of metabolic waste from the brain, including facilitating the clearance of proteins that aggregate in Alzheimer's disease," said neuroscientist Matthew Pase from Monash University in Australia.

"However, to date we have been unsure of the role of slow-wave sleep in the development of dementia. Our findings suggest that slow-wave sleep loss may be a modifiable dementia risk factor." ...

#1 | Posted by LampLighter at 2024-06-10 01:43 AM | Reply

Good that you posted the extra info, that headline and summary are REALLY clickbaity.

#2 | Posted by DarkVader at 2024-06-11 01:07 AM | Reply

Ahp! I'm screwed then...

Maybe in retirement I will get
better sleep.

#3 | Posted by earthmuse at 2024-06-11 11:03 AM | Reply

You'll be waking up every hour to go pee. You're doomed.

#4 | Posted by LegallyYourDead at 2024-06-11 12:57 PM | Reply | Funny: 1

I've been following the presentation of this information for several months.
I have found it to be utterly unhelpful.
The link that is known is that less deep sleep AND a 1% drop correlate, but the loss of deep sleep is NOT proven to be causal.
Correlation does not imply causation.

This article actually states as much after all the drama, but at least it states such (unlike almost every other article out there).

Although these are clear associations, the authors note this type of study doesn't prove that slow-wave sleep loss causes dementia, and it's possible dementia-related brain processes cause sleep loss. For these factors to be fully understood, more research is required.
So it is entirely conceivable that dementia causes the loss of deep sleep.

To make things worse, most of the studies and articles out there conflate deep sleep with REM sleep. Even this article says "20-40 minutes in deep sleep" but then says "each 1%" - what? So how much "deep sleep" is needed? 1% less from what? An "average" of everyone else?

So the answer is that people that have dementia or Alzheimer's have a baseline that was taken years before, and then they have a new baseline, and that baseline is 1% less (or more) which was then extrapolated to infer a correlation.

In the end this information offers nothing actionable.

#5 | Posted by YAV at 2024-06-11 01:16 PM | Reply

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