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Segmented sleep, also known as divided sleep, bimodal sleep pattern, bifurcated sleep, or interrupted sleep, is a polyphasic sleep or biphasic sleep pattern where two or more periods of sleep are punctuated by periods of wakefulness. Along with a nap (siesta) in the day, it has been argued that this is the natural pattern of human sleep.[1][2] A case has been made that maintaining such a sleep pattern may be important in regulating stress.[2]
Historian A. Roger Ekirch[3][4] has argued that before the Industrial Revolution, segmented sleep was the dominant form of human slumber in Western civilization. He draws evidence from documents from the ancient, medieval, and modern world.[2] Other historians, such as Craig Koslofsky,[5] have endorsed Ekirch's analysis.
originally posted by: pl3bscheese
a reply to: Vasa Croe
Your link says simians are monophasic. Personally I think it's not the same for our whole species. I think local/group adaptations would give way to different sleep cycles. There seems to be evidence for this as people vary in their ability to sleep in degrees of sunlight. This correlates to difference in melatonin destruction from light penetrating a closed eyelid.
Outside of what is natural, abnormal sleep states happen when certain conditions arise, such as is my case.
originally posted by: AugustusMasonicus
a reply to: Vasa Croe
See, once again, you learned everything you needed to know in kindergarten.
That is why I try to haul out my little piece of carpet every afternoon and take a nap.
originally posted by: johndeere2020
My biological clock has been thrown out of balance in recent weeks.
I often wake up around 2:30 am thinking it's already 6:30 am and get back to sleep again.
I often dream. Nothing strange about the content of the random dreams, except that the real time around me seems to crawl every time.
In those dreams, I experience six or sometimes 12 hours passing of time and when I wake up, only 1 or 2 hrs had passed. It can be annoying because I sometimes lose the mood to sleep again and I get very groggy the next day.
My room has absolutely no window and it's very well sealed. No light from outside comes in. So I have no idea if it's day or night without checking the time. May have to do with it??
originally posted by: johndeere2020
My biological clock has been thrown out of balance in recent weeks.
I often wake up around 2:30 am thinking it's already 6:30 am and get back to sleep again.
I often dream. Nothing strange about the content of the random dreams, except that the real time around me seems to crawl every time.
In those dreams, I experience six or sometimes 12 hours passing of time and when I wake up, only 1 or 2 hrs had passed. It can be annoying because I sometimes lose the mood to sleep again and I get very groggy the next day.
My room has absolutely no window and it's very well sealed. No light from outside comes in. So I have no idea if it's day or night without checking the time. May have to do with it??
originally posted by: DAVID64
a reply to: johndeere2020
#1 How old are you? As some of us get older, we sleep less. In my teens and early 20s, I slept 8 hours a day. By the time I was 30 that had went to 5 or 6 and now at 51, I sleep about 4 hours a night. Go to bed later than usual and see if that helps you sleep through the night. Don't force it. Your body will sleep when it needs to.
#2 Have you had any stress added to your life lately? Job, marriage, new kid on the way...........? Stress can throw your body out of whack. Try to relax and when the stress goes, your sleep pattern will follow.
"Dream time" always seems longer than real time. A dream that encompasses a whole day may only take a few seconds in real time, so you think you've been asleep longer.
originally posted by: Vasa Croe
The natural sleep cycle for humans is not the traditional 8 hours a night cycle. It is really in multiple shifts throughout the day..