Each of these stages will be used in the waves that your brain gives off during the night time.
Ironically, some of the most interesting places to eat, see and stay are also at the cheaper end. Deep sleep regenerates your body, and REM sleep appears to be regenerate the brain. https://www.Digitaljournal.com/pr/news/press-advantage/phoenix-arizona-probate-lawyer-libby-1716933457.html