2,197
edits
Changes
From Polyphasic Sleep Wiki
added a new section (alt mechanism)
Some individuals may be natural [[segmented]], [[siesta]], or [[DC1]] sleepers, given that an individual's sleep may become bifurcated when undisturbed<ref>Wehr, Thomas A. "In short photoperiods, human sleep is biphasic." ''Journal of Sleep Research'' 1.2 (1992): 103-107. Available [https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1992.tb00019.x here] as of 25 Nov 2020.</ref>, particularly with a lack of artificial lighting during the evening, and that non-industrial societies<ref>Yetish, Gandhi, et al. "Natural sleep and its seasonal variations in three pre-industrial societies." ''Current Biology'' 25.21 (2015): 2862-2868.</ref><ref>Ekirch, A. Roger. "Segmented sleep in preindustrial societies." (2016): 715-716. Available [https://academic.oup.com/sleep/article-pdf/39/3/715/13679929/aasm.39.3.715.pdf here] as of 25 Nov 2020.</ref> or non-electric societies<ref>Samson, David R., et al. "Segmented sleep in a nonelectric, small‐scale agricultural society in Madagascar." ''American Journal of Human Biology'' 29.4 (2017): e22979. Available [https://www.researchgate.net/profile/Efe_Fakir/publication/313547295_Segmented_sleep_in_a_nonelectric_small-scale_agricultural_society_in_Madagascar_SAMSON_et_al/links/59f033420f7e9baeb26add03/Segmented-sleep-in-a-nonelectric-small-scale-agricultural-society-in-Madagascar-SAMSON-et-al.pdf here] as of 25 Nov 2020.</ref> tend to have a biphasic sleeping pattern with an elective nap in the afternoon.
Some individuals may be natural [[segmented]], [[siesta]], or [[DC1]] sleepers, given that an individual's sleep may become bifurcated when undisturbed<ref>Wehr, Thomas A. "In short photoperiods, human sleep is biphasic." ''Journal of Sleep Research'' 1.2 (1992): 103-107. Available [https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1992.tb00019.x here] as of 25 Nov 2020.</ref>, particularly with a lack of artificial lighting during the evening, and that non-industrial societies<ref>Yetish, Gandhi, et al. "Natural sleep and its seasonal variations in three pre-industrial societies." ''Current Biology'' 25.21 (2015): 2862-2868.</ref><ref>Ekirch, A. Roger. "Segmented sleep in preindustrial societies." (2016): 715-716. Available [https://academic.oup.com/sleep/article-pdf/39/3/715/13679929/aasm.39.3.715.pdf here] as of 25 Nov 2020.</ref> or non-electric societies<ref>Samson, David R., et al. "Segmented sleep in a nonelectric, small‐scale agricultural society in Madagascar." ''American Journal of Human Biology'' 29.4 (2017): e22979. Available [https://www.researchgate.net/profile/Efe_Fakir/publication/313547295_Segmented_sleep_in_a_nonelectric_small-scale_agricultural_society_in_Madagascar_SAMSON_et_al/links/59f033420f7e9baeb26add03/Segmented-sleep-in-a-nonelectric-small-scale-agricultural-society-in-Madagascar-SAMSON-et-al.pdf here] as of 25 Nov 2020.</ref> 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>[https://polyphasic.net polyphasic.net]. Retrieved 17-12-2020.</ref>
== Dual core schedules ==
== Dual core schedules ==
[[File:Bimaxion.png|thumb|A standard Bimaxion variant]]
[[File:Bimaxion.png|thumb|A standard Bimaxion variant]]
[[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.
== Alternative mechanism ==
{{Alternative Theory}}
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:Sekvanto segshort.png|[[User:Sekvanto|Sekvanto]], Segmented-shortened, Zeo EEG. The first core has additional light sleep in the end; the second core starts with SOREM.
</gallery>
== References ==
== References ==
<references />{{TNT|Polyphasic Sleep Schedules}}
<references />{{TNT|Polyphasic Sleep Schedules}}
[[Category:Schedules]]
[[Category:Schedules]]
