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Segmented is a [[Special:MyLanguage/biphasic|biphasic]] [[Special:MyLanguage/Template:Polyphasic Sleep Schedules|schedule]]<ref>[https://www.polyphasic.net/schedules/biphasic/ polyphasic.net]. Retrieved 23-11-2020.</ref> with two [[Special:MyLanguage/cores|cores]] at night, usually with a total sleep time close to one's personal [[Special:MyLanguage/monophasic|monophasic]] baseline.
Segmented is a [[Special:MyLanguage/biphasic|biphasic]] [[Special:MyLanguage/Template:Polyphasic Sleep Schedules|schedule]]<ref>[https://www.polyphasic.net/schedules/biphasic/ polyphasic.net]. Retrieved 23-11-2020.</ref> with two [[Special:MyLanguage/cores|cores]] at night, usually with a total sleep time close to one's personal [[Special:MyLanguage/monophasic|monophasic]] baseline.
==Origin== <!--T:2-->
==Origin== <!--T:2-->
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People would often go to bed some time after sunset, wake up after a few hours, stay awake for a couple hours, and then go back to bed until sunrise. Some naturally Segmented sleepers report interrupted monophasic sleep, where they wake up in the middle of the night. They are often suggested to adopt a Segmented sleep schedule.
People would often go to bed some time after sunset, wake up after a few hours, stay awake for a couple hours, and then go back to bed until sunrise. Some naturally Segmented sleepers report interrupted monophasic sleep, where they wake up in the middle of the night. They are often suggested to adopt a Segmented sleep schedule.
==Mechanism== <!--T:5-->
==Mechanism== <!--T:5-->
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Both core sleeps are scheduled to be 3.5 hours by default because the sleep cycles are known to lengthen to about 105 minutes from the approximately 90-minute cycles on monophasic sleep. This would also explain the viability of the schedule despite having fewer cycles.
Both core sleeps are scheduled to be 3.5 hours by default. The sleep cycles likely lengthen to about 105 minutes from the approximately 90-minute cycles on monophasic sleep. This would also explain the viability of the schedule despite having fewer cycles. However, recently EEG readings of some members have shown the opposite.
{{further|Dual core|Alternative mechanism}}
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