Psychology / Unit 3 Psych 0293 short lesson, about 20 seconds
Circadian Rhythm
Captions available
The idea
A circadian rhythm is a biological cycle of roughly twenty-four hours that regulates sleep, temperature, and alertness.
In practice
Core body temperature falls in the hours before habitual sleep and rises again before habitual waking.
Where people slip
The rhythm continues without light cues. It runs slightly off twenty-four hours and is corrected daily.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Something wrong in this lesson? Flag it · Sources for Psychology