How important is stage 3 sleep?

StillAnotherGuest · Post by **StillAnotherGuest** » Sun Oct 21, 2007 7:25 am

Catnapper wrote:Would you tell me the page where your quote is?

Page 304 in the McCarley article:

Sleep with delta waves is minimally present in the newborn but increases over the first years of life, reaching a maximum at about age 10 and declining thereafter. Feinberg and co-workers [5] have noted that the first three decades of this delta activity time course can be fit by a gamma probability distribution and that a gamma distribution also fits the time course of synaptic density and frontal cortex metabolic activity, as measured by positron emission tomography (PET). They speculate that the reduction in these three variables may reflect a pruning of redundant cortical synapses that is a key factor in cognitive maturation, allowing greater specialization and sustained problem solving.

SAG

Catnapper · Post by **Catnapper** » Sun Oct 21, 2007 8:34 am

Feinberg et al did their study on data going from birth to 30 years of age. Man, that doesn't seem OLD! to me. Wonder what they would have found if they studied beyond 30. Does this effect stabilize or increase?

Thanks for the page reference. I will take it to the doctor for his edification ASAP.

Any more?

StillAnotherGuest · Post by **StillAnotherGuest** » Sun Oct 21, 2007 11:48 am

Catnapper wrote:Feinberg et al did their study on data going from birth to 30 years of age. Man, that doesn't seem OLD! to me.

I guess "old" is relative to where you happen to be standing at the moment. I used to think 30 was the step before dead. OK, that was a while ago.

Catnapper wrote:Wonder what they would have found if they studied beyond 30. Does this effect stabilize or increase?

SWS% continues to decrease until you hit zero, then it stabilizes.

SAG

rested gal · Post by **rested gal** » Mon Oct 22, 2007 3:14 am

Looking at the top chart....hmmm. These reading glasses I found somewhere work really well!!!! Better than my own!

Back to the top chart. So, 20 minutes of SWS is about right back at 60 yrs of age.

Cool!

I hit 21 minutes of it one night, 13 minutes on another night, and none on another night. Got my "most" of it on a night without cpap. The night of none -- with my autopap. Should that tell me something? hehheh. (Did, too!!)

The night without cpap was after staying awake for over 48 hours so I'd be SURE to sleep that night.

Can I skew data every which way, or not? LOL!!!

I really, really do like these glasses.

StillAnotherGuest · Post by **StillAnotherGuest** » Mon Oct 22, 2007 5:28 am

rested gal wrote:I hit 21 minutes of it one night, 13 minutes on another night, and none on another night. Got my "most" of it on a night without cpap. The night of none -- with my autopap. Should that tell me something? hehheh. (Did, too!!)

And if you were using the SAG Rules of Sleep Staging (the 50 uV Rule), you would have had even more than that!

Hmmm, sleep deprivation. That's another approach.

SAG

PS - Not, not, not!

How important is stage 3 sleep?

It's on Page...

That is old?

But A Few Lucky Stiffs Continue To Have SWS

How Much SWS Would You Like?