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...schedules (5 naps per day). Because of the total sleep of only more than 3 hours, it is considered the last Everyman schedule before one can transition to ' ...ts. The latest nap in the day, located around late afternoon/early evening hours (~6 PM) may also contain SWS because of the high sleep pressure formed by t

...one short 1.5-hour [[core]], and 4 [[naps]] to be scheduled each day. At 2 hours and 50 minutes of total sleep, it is an extremely difficult schedule and ve ...s]]. Since it is usually easier to stay awake in the afternoon and evening hours, the last wake gap before core is somewhat longer.

...il the advent of electric lighting . In short photoperiods (fewer daylight hours), it has been shown that human sleep is naturally segmented<ref name="wehr" ...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 r

...il the advent of electric lighting . In short photoperiods (fewer daylight hours), it has been shown that human sleep is naturally segmented<ref name="wehr" ...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 r

...il the advent of electric lighting . In short photoperiods (fewer daylight hours), it has been shown that human sleep is naturally segmented<ref name="wehr" ...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 r

...il the advent of electric lighting . In short photoperiods (fewer daylight hours), it has been shown that human sleep is naturally segmented<ref name="wehr" ...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 r

...il the advent of electric lighting . In short photoperiods (fewer daylight hours), it has been shown that human sleep is naturally segmented<ref name="wehr" ...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 r