SomeNitpickingGuy 2020-07-06 12:51:18 ☒ ⚑ ⛔ 0 ♡ I gotta admit that the sleep cycle diagram threw me off. Right now, only 5 sleep stages are distinguished for humans (awake, REM, N1, N2, N3).
Admin 2020-07-06 23:10:38 ☒ ⚑ ⛔ 0 ♡ That seems to be an arbitrary change made within the past 10 years. The graph here comes from the sample hypnogram on the wikipedia rem sleep entry.
Your Quiet Neighbor 2022-11-28 16:23:13 ☒ ⚑ ⛔ 0 ♡ Correction to my earlier comment:"Datum" should read as "Dayum"