Introduction – Your Circadian Rhythm:
My previous post explained what sleep scientists have measured during sleep using EEG, and scientists’
current state of interpretations. Included in that post was my definition of objective sleep quality: going through the proper sequence of sleep cycles during the night with sufficient amounts of both stage 3 sleep (slow-wave sleep) and REM sleep. This post will focus on what drives you to be awake during the day, and makes you sleep at night: your circadian rhythm. The term circadian rhythm comes from the latin words “circa” which means “around”, and “dia”, which means day. So, a circadian rhythm is any biological process that cycles around the Earth day, which is 24 hours.