PSYC 191 Lecture Notes - Lecture 3: Sleep Onset, Sleep Deprivation, Hazard Ratio
Document Summary
Purpose of desynchronization experiment- evidence in favor of hypothesis that circadian rhythms act independently on sleepiness. Homeostatic and circadian rhythms act independently of motivational factors. Large individual differences in sleep time per nychthemeron (3-10 hours: 8 hours is just average, actual sleep you need varies. Reports of people who never sleep are either false or due to rare genetics. Ones that sleep less tend to not live as long. Evidence for circadian differences: single drosophila gene mutation dramatically reduces sleep time and. But circadian still doing job; suggests a homeostatic sleep drive longevity difference. Patterns there, but reduced (less sleeping time) night. Circadian differences among humans: long sleepers have a longer biological: sleep patterns and circadian rhythms recorded for group of short and, sharp increase in melatonin when sleeping, and great reduction when. Found peak was higher for long sleepers, also offset differences long sleepers. you wake up. If was identical, then circadian would not be a driver.
