Changes

== Mechanism ==

== Mechanism ==

As a typical Dual Core schedule, DC4 inherits all the characteristics from [[Segmented]] sleep, with the [[repartitioning]] of [[SWS]] and [[REM]] into respective core sleeps. The last nap, being placed around 6 PM, is intended to provide more alertness. While looking very similar to DC3, the purpose of DC4 is to '''transition to [[Uberman]] sleep''', with 2 core sleeps to eventually be reduced to 2 20m naps. To prepare for the transition, all sleep blocks on DC4 look equidistant in scheduling to resemble the wake gap between each nap on Uberman, which is approximately ~3h40m to 4h.  

As a typical Dual Core schedule, DC4 inherits all the characteristics from [[Segmented]] sleep, with the [[repartitioning]] of [[wikipedia:Slow-wave_sleep|SWS]] and [[wikipedia:Rapid_eye_movement_sleep|REM]] into respective core sleeps. The last nap, being placed around 6 PM, is intended to provide more alertness. While looking very similar to DC3, the purpose of DC4 is to '''transition to [[Uberman]] sleep''', with 2 core sleeps to eventually be reduced to 2 20m naps. To prepare for the transition, all sleep blocks on DC4 look equidistant in scheduling to resemble the wake gap between each nap on Uberman, which is approximately ~3h40m to 4h.  

Because of the 2 core sleeps, which facilitate ideally all SWS, the remaining naps provide REM sleep to keep a healthy balance of homeostatic pressure. The first nap is expected to be teemed with REM sleep, thanks to its position in REM peak. Other naps provide potentially less amount of REM sleep, as well as some NREM2.  

Because of the 2 core sleeps, which facilitate ideally all SWS, the remaining naps provide REM sleep to keep a healthy balance of homeostatic pressure. The first nap is expected to be teemed with REM sleep, thanks to its position in REM peak. Other naps provide potentially less amount of REM sleep, as well as some NREM2.  

With all the downsides, DC4's use is mostly to '''learn to nap''' with the high number of naps per day. It can be used as a less extreme form of Naptation thanks to 2 core sleeps. Sleepers can choose to start this schedule temporarily as a way to learn how to learn the short naps, [[Recovery|recover]] on monophasic afterwards, and start a polyphasic attempt anew, including Uberman if desired. DC4 may also act as a fallback schedule if Uberman or [[E5]] happens to fail, but no one has pulled this off so far. With everything being '''mostly hypothetical''', there is little to no use in attempting this schedule. DC3 would be the more preferable choice.

With all the downsides, DC4's use is mostly to '''learn to nap''' with the high number of naps per day. It can be used as a less extreme form of Naptation thanks to 2 core sleeps. Sleepers can choose to start this schedule temporarily as a way to learn how to learn the short naps, [[Recovery|recover]] on monophasic afterwards, and start a polyphasic attempt anew, including Uberman if desired. DC4 may also act as a fallback schedule if Uberman or [[E5]] happens to fail, but no one has pulled this off so far. With everything being '''mostly hypothetical''', there is little to no use in attempting this schedule. DC3 would be the more preferable choice.

[[Category:Schedules]]

[[Category:Schedules]]

{{TNT|Polyphasic Sleep Schedules}}

{{TNT|Polyphasic Sleep Schedules}}