Dual core: Difference between revisions
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== Mechanism == | == Mechanism == | ||
Generally, the first sleep is taken around dusk (i.e. starting ~19-23) to take advantage of increased likelihood of slow-wave sleep (SWS) due to melatonin secretion around this time, meanwhile the second sleep is generally taken around dawn (i.e. starting ~4-8) to take advantage of increased likelihood of rapid eye movement (REM) sleep<ref | Generally, the first sleep is taken around dusk (i.e. starting ~19-23) to take advantage of increased likelihood of slow-wave sleep (SWS) due to melatonin secretion around this time, meanwhile the second sleep is generally taken around dawn (i.e. starting ~4-8) to take advantage of increased likelihood of rapid eye movement (REM) sleep.<ref name="Feinberg" /><ref name="Franz" /><ref name="Wallace" /> | ||
Some individuals may be natural [[segmented]], [[siesta]], or [[DC1]] sleepers, given that an individual's sleep may become bifurcated when undisturbed<ref | Some individuals may be natural [[segmented]], [[siesta]], or [[DC1]] sleepers, given that an individual's sleep may become bifurcated when undisturbed<ref name="Wehr" />, particularly with a lack of artificial lighting during the evening, and that non-industrial societies<ref name="Gandhi" /><ref name="Ekirch" /> or non-electric societies<ref name="Samson" /> tend to have a biphasic sleeping pattern with an elective nap in the afternoon. | ||
The core length on the standard dual core schedules often isn't a multiple of 1.5h. It was suggested that sleep cycles are compressed/lengthened in this case.<ref | The core length on the standard dual core schedules often isn't a multiple of 1.5h. It was suggested that sleep cycles are compressed/lengthened in this case.<ref name="polynet" /> | ||
== | == Alternative mechanism == | ||
Segmented and siesta, along with [[E1|Everyman 1]] (a single core sleep schedule), tend to have high success rates within the polyphasic community.<ref | {{Alternative Hypothesis}} | ||
It was noticed by some polyphasic community members that a longer core length, which is not a multiple of 1.5h, did not lead to the cycle lengthening on dual core schedules in some cases. This is mostly applicable to the standard Segmented and DC1 schedules. | |||
=== Core 1 === | |||
The first core on the standard Segmented is 3.5 hours, and 3.3 hours on DC1. The additional 20-30 minutes often are added to [[cores]] for getting more [[wikipedia:Non-rapid_eye_movement_sleep|NREM2]] or [[wikipedia:Rapid_eye_movement_sleep|REM]] sleep. In this case, sometimes the core has a normal structure with the standard sleep cycles length. Some additional light sleep is inserted after the second core, which makes waking up and staying awake easier. | |||
=== Core 2 === | |||
According to the [[EEG]] readings of some community members, the second core on dual core schedules often starts with [[SOREM]], following by a regular non-lengthened sleep cycle. This is also a possible reason why Segmented sleep is a viable schedule despite having fewer cycles. In fact, it might have a regular number of the REM episodes, considering SOREM in the second core is the fifth one. | |||
=== Examples === | |||
<gallery> | |||
File:20201217072015!phpEhCzvJ.png|Segmented-shortened, Zeo EEG. The first core has additional light sleep in the end; the second core starts with SOREM. | |||
File:MostlySmart DC4 cut.png|MostlySmart, DC4, Zeo EEG. SOREM in the second core. | |||
File:segmented eeg.png|Segmented-recovery, Zeo EEG. Additional light sleep in the end of core 1; SOREM in core 2. | |||
</gallery> | |||
== Schedules == | |||
Segmented and siesta, along with [[E1|Everyman 1]] (a single core sleep schedule), tend to have high success rates within the polyphasic community.<ref name="polysurvey" /> | |||
=== Segmented === | === Segmented === | ||
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[[DC4|Dual core 4]], usually denoted as DC4, has two short cores at night and four naps. The total sleep time of DC4 is generally 4h20m. This schedule is often used as a means for gradual adaptation to Uberman, but so far no successful attempts has been known with this approach. | [[DC4|Dual core 4]], usually denoted as DC4, has two short cores at night and four naps. The total sleep time of DC4 is generally 4h20m. This schedule is often used as a means for gradual adaptation to Uberman, but so far no successful attempts has been known with this approach. | ||
=== | === Ducamayl === | ||
[[File: | [[File:Ducamayl from DC2-Mod.png|thumb|A possible Ducamayl variant]] | ||
[[ | [[Ducamayl]], an acronym for "dual core as much as you like", is a variant of [[Spamayl]] that includes two core sleeps, generally at dusk and dawn. The idea is to adapt to a general dual core sleep schedule, one in which the individual learns the flexibility to move around start & end times of their cores & nap(s). The total sleep varies broadly, though is generally 5h30m to 7h. | ||
=== Bimaxion === | === Bimaxion === | ||
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[[Bimaxion]] is a strict schedule that combines elements of DC2 and [[Dymaxion]] (an experimental nap-only schedule), designed as a transitional schedule with Dymaxion in mind. The total sleep time is 4h. | [[Bimaxion]] is a strict schedule that combines elements of DC2 and [[Dymaxion]] (an experimental nap-only schedule), designed as a transitional schedule with Dymaxion in mind. The total sleep time is 4h. | ||
== | == References == | ||
{{ | {{reflist|refs= | ||
<ref name="Feinberg">{{cite journal |vauthors=Feinberg I, Floyd TC |date=1979 |title=Systematic trends across the night in human sleep cycles |journal=Psychophysiology |volume=16 |issue=3 |pages=283-291}}</ref> | |||
<ref name="Franz">{{cite journal |vauthors=Franz W |date=2017 |title=Modeling the mammalian sleep cycle |journal=Current opinion in neurobiology |volume=46 |pages=68-75}}</ref> | |||
=== | <ref name="Wallace">{{cite journal |vauthors=Wallace CD |date=2009 |title=A biphasic daily pattern of slow wave activity during a two-day 90 minute sleep wake schedule |journal=Archives italiennes de biologie |volume=147 |issue=4 |pages=117-130}}</ref> | ||
<ref name="Wehr">{{cite journal |vauthors=Wehr TA |date=1992 |title=In short photoperiods, human sleep is biphasic |journal=Journal of Sleep Research |volume=1 |issue=2 |pages=103-107}}</ref> | |||
<ref name="Gandhi">{{cite journal |vauthors=Gandhi Y |date=2015 |title=Natural sleep and its seasonal variations in three pre-industrial societies |journal=Current Biology |volume=25 |issue=21 |pages=2862-2868}}</ref> | |||
<ref name="Ekirch">{{cite journal |vauthors=Ekirch AR |date=2016 |title=Segmented sleep in preindustrial societies |pages=715-716}}</ref> | |||
<ref name="Samson">{{cite journal |vauthors=Samson DR |date=2017 |title=Segmented sleep in a nonelectric, small‐scale agricultural society in Madagascar |journal=American Journal of Human Biology |volume=29 |issue=4}}</ref> | |||
<ref name="polynet">{{cite web |url=https://web.archive.org/web/20201125214204/https://www.polyphasic.net/sleep-mechanics/polyphasic-sleep-adaptation/ |title=Polyphasic Sleep & Adaptation |website=polyphasic.net |access-date=2020-12-17}}</ref> | |||
<ref name="polysurvey">{{cite web |url=https://youtu.be/BA24s8KwBi0 |title=Polyphasic Survey Results and Analysis |date=2018 |website=YouTube}}</ref> | |||
}} | |||
{{TNT|Polyphasic Sleep Schedules}} | |||
[[Category:Schedules]] | [[Category:Schedules]] | ||
