# non-REM sleep

All of sleep except REM sleep, from the lightest stages down to deep sleep.

## Where it comes up

- [What happens while we sleep?](https://nitez.com/stages-of-sleep)
- [What is deep sleep, and am I getting enough?](https://nitez.com/deep-sleep)
- [Why do we dream?](https://nitez.com/why-we-dream)

https://nitez.com/words/non-rem-sleep