Sleep
-is a state of consciousness
-we are less aware of our surrounding
Biological rhythm
-annual cycle (seasonal variations )
-28 day cycle ( menstrual cycle )
-24 hour cycle ( circadian Rhythm)
-90 minute cycle ( sleep cycle)
Circadian rhythm
- 24 hours biological clock
- our body temperature and awareness changes throughout the day
- it is best to take a test or study during your circadian peak
Sleep stages
- there are 5 identified stages of sleep
- it takes about 90-100 minutes to pass through the 5 stages
- the brain waves will change according to the sleep stage you are in
-the first 4 stages are known as NREM sleep
- the fifth stage is called REM sleep
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