Changes

{{TNT|Segmented}}

{{TNT|Segmented}}

A [[biphasic]] [[Template:Polyphasic Sleep Schedules|schedule]], which contains two [[cores]] at night, usually with a high total sleep time, close to a personal [[monophasic]] baseline.

A [[biphasic]] [[Template:Polyphasic Sleep Schedules|schedule]], which contains two [[cores]] at night, usually with a high total sleep time, close to a personal [[monophasic]] baseline.<ref>[https://www.polyphasic.net/schedules/biphasic/ polyphasic.net]. Retrieved 23-11-2020.</ref>

== Mechanism ==

== Mechanism ==

Segmented sleep, sometimes referred to as Bifurcated sleep, is one of the earliest polyphasic schedules. It is also one of the 4 Biphasic schedules available. Aside from its role as the progenitor of Dual Core sleep, its creation ('''non-reducing''') was natural and dated back to the [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763365/ preindustrial era] (1750-1850), making it roughly 250 years old as of today. In short photoperiods (less daytime hours and more night time hours), it was researched that human sleep is also [https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2869.1992.tb00019.x naturally segmented]. What is commonly observed in this Segmented behavior is that people would often go to bed after sunset, wake up after some hours at night, stay awake for a couple hours, and then go back to bed until sunrise hours. Segmented sleep is still common nowadays, being involuntarily or voluntarily practiced by many in the world. Nowadays, '''naturally Segmented sleepers''' have a short wake gap between 2 cores (~1.5-3h) as a result of interrupted monophasic sleep, in the middle of the night. It only makes sense then, that sleepers would wake up feeling refreshed from the first core, do something at night, before they go back to sleep when sleepiness level rises enough.

Segmented sleep, sometimes referred to as Bifurcated sleep, is one of the earliest polyphasic schedules. It is also one of the 4 Biphasic schedules available. Aside from its role as the progenitor of Dual Core sleep, its creation ('''non-reducing''') was natural and dated back to the [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4763365/ preindustrial era] (1750-1850), making it roughly 250 years old as of today. In short photoperiods (less daytime hours and more night time hours), it was researched that human sleep is also [https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2869.1992.tb00019.x naturally segmented]. What is commonly observed in this Segmented behavior is that people would often go to bed after sunset, wake up after some hours at night, stay awake for a couple hours, and then go back to bed until sunrise hours. Segmented sleep is still common nowadays, being involuntarily or voluntarily practiced by many in the world. Nowadays, '''naturally Segmented sleepers''' have a short wake gap between 2 cores (~1.5-3h) as a result of interrupted monophasic sleep, in the middle of the night. It only makes sense then, that sleepers would wake up feeling refreshed from the first core, do something at night, before they go back to sleep when sleepiness level rises enough.