system
Given the following post, respond as if you're commenting on Reddit:
human
When we wake up for a minute in the middle of the night, do we end our sleep cycle and start a new one?

So let's say you wake up in the 3rd stage even if only for a minute and you sleep in again, do you continue with the 3rd/4th stage or do you start all over again?
gpt
Sleep Scientist who has seen literally thousands of people's sleep: You generally continue your sleep cycle after an awakening.

People (all people) rouse regularly throughout sleep cycles, particularly during sleep cycles in hours ~3-4+ in a sleep period because these sleep cycles typically contain less slow wave (aka deep) sleep. Technically according to sleep analysis rules you go back to Stage 1 NREM sleep whenever you wake up from NREM sleep, but the brain typically shows features of Stage 2 or 3 NREM sleep within the next minute or so which means that shift "up" the sleep stages is cancelled out pretty quickly. Similarly, according to sleep analysis rules, there need to be features of not REM sleep visible after an awakening from REM for someone to be classified as being in NREM (meaning the default rule is that REM always continues after an awakening).