Andrew Huberman· PhD
one of the Hallmarks of stage two non-rem sleep or something called sleep spindles
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one of the Hallmarks of stage two non-rem sleep or something called sleep spindles
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you get some of them in the first quarter more of them in the second quarter of sleep certainly more in the third quarter but you get a lot more of those sleep spindles in the last quarter of the night
now and again during stage two the way that I know that you're in this lighter stage of non REM sleep stage two is that you'll get these synchronous bursts of electrical activity that we call sleep spindles that's the case bender and that sort of yeah where you get this actually you get a nice big slow wave or like almost like a single slow wave and then you get this burst of a sleep spindle and we actually did this great project here at the Sleep Center where we did the sonification of sleep and we we extracted brain waves from human beings and then we sort of you know smooth them a little bit with some sort of audio software and then you can play them back and it's beautiful because when you hear these sleep spindles they are these short synchronous bursts of electrical activity that lasts for about a second and a half and they go up to about ten or fifteen cycles per second
you'll get these synchronous bursts of electrical activity that we call sleep spindles that's the case spindle and that's sort of yeah where you get this actually you get a nice big slow wave like almost like a single slow wave and then you get this burst of a sleep spindle and we actually did this great project here at the sleep center where we did the sonification of sleep and we we extracted brain waves from human beings and then we sort of you know smooth them a little bit with some sort of audio software and then you can play them back and it's beautiful because when you hear these sleep spindles they are these short synchronous bursts of electrical activity that last for about a second and a half and they go up to about 10 or 15 cycles per second
Well, you see sleep spindles throughout almost all of non-REM. So once you get past the lightest sort of Stage 1 on REM, then you get spindles throughout all of non-REM, but they are a prototypical feature of Stage 2 non-REM as well. Then Stage 3 and 4, which is sort of like the deep sleep stuff, you also get spindles there, too.
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