DANCE 3 Lecture Notes - Lecture 3: Caffeine, Non-Rapid Eye Movement Sleep, Homeostasis
Document Summary
Sleep regulation: sleep variables, duration, sleep intensity, regulated by, circadian system (biological clock, not something you can change overnight, homeostatic mechanism, getting to a level of generality. Sleep cycles: biological clock when, cycle: a little long than 24 hr period, circadian clock, circa = about, diem = day, clock regulates, seasonal reproductive cycles, sleep/wake cycles, external and internal rhythms, external (environmental) rhythm. Light: sun comes up -> wake, moon comes up -> sleep: clock location: suprachiasmatic (scn) nucleus of the hypothalamus in the brain, at scn signals interact with genes (active/inactive) to serve as (cid:862)pacemakers(cid:863, smells: breakfast foods ->wake. Increased heart-rate: sleep homeostasis need, sleep homeostasis, molecule adenosine, keep tracks of sleep loss, may induce sleep, caffeine binds and blocks receptors, hormone melatonin: Levels decline at dawn: controlled by the clock, taken more as people age or when people travel a lot. Everyone has a biological clock true: the timing of sleep in humans is regulated by our biological clock.
