Circadian Rhythm: The Circadian Rhythm is a 24 hour cycle that the human body goes through. The day and night sleep cycle: 6 to 10 hour period in which we sleep. This sleep period includes both deep sleep, and REM sleep. Ultradian Rhythm. Source: Luciddreamexplorers https://ygraph.com/chart/2077
Circadian Rhythm: The Circadian Rhythm i
