So... can we trigger it manually? I'd love to be able to lay down and press the 'flush brain' button.

If you're very tired you should be able to fall asleep, or at least doze off, whenever you let yourself go.

It seems likely that you'll get those flushes right after falling asleep, so a nap of a few minutes could help a lot.

In my experience, after a night without sleep even a 30 seconds nap reinvigorates you significantly.

Research on NDSR, I have been using this for days I had to wake up without proper rest.

If you have 15m, search this on YT for a guided practice and test it yourself.

NSDR, rather—Non-Sleep Deep Rest.

I believe you were referring to NSDR (Non-Sleep Deep Rest)?

Mixing up acronyms is on brand with sleep deprivation.

Yes, thanks for the correction. I need to get some real sleep.

Kind of related, but there is a concept of polyphasic sleep - where you sleep for small increments throughout the day (like 30 minutes every 3 hours). I did it for a bit at a startup thinking we were "hacking sleep" and "getting more productive hours out of every day!" - It takes awhile to transition to it, but once there, your scheduled "sleeps" are insane, 15 minutes, feel like straight to REM. The main problem was if you missed on schedule sleep you were a zombie.

Yeah, when I was looking into the plausibility and function of polyphasic sleep, I stumbled across studies from the US Airforce. Their conclusion was similar: In a controlled enviroment, it can be spectacular and work really, really well.

However, it is very, very fragile to any kind of interruption, so they stopped looking into it.

When I worked an overnight shift and lived alone, I got into a pattern of 2 to 3 hours a go three times a day. These were after work, halfway or so through my personal time, and before work. I used these separate times in between sleeps for work, almost exclusively for chores, and a dedicated slot for hobbies. I started each one refreshed, which was great. It doesn’t necessarily work so well when aligning your life with a partner.

Searching back, as I recall a video that was supposed to cause [increased] CSF flow, I did find this - https://news.ycombinator.com/item?id=34764730 about suggestions some learning difficulties might be due to interrupted CSF fluid flow.

The video (?) was related to clearing of plaques from the brain with a view to mitigating Alzheimer's effects.

It was not the NSDR (Non-Sleep Deep Rest) videos a sibling commenter posted.

https://news.ycombinator.com/item?id=41942775

Thanks for that, I found a 40hz video ... it wrecked my Dell monitor (might be temporary?).

I'm not convinced that the screen nor the headphones are actually providing the required rates.

In the experiments they appear to use a large (c.1m^2) light box so the patient can watch a video from a tablet placed in the middle.

Reading your link made my brain 'resonate' in an unpleasant way; perhaps an auditory memory of watching the video.

All very interesting.