Presentation on theme: "To Sleep, No Doubt to Dream"— Presentation transcript:
1To Sleep, No Doubt to Dream By Sierra Hieronymus and Sierra Carrel
2Regularly occurring periods of eye mobility and concomitant phenomena, 1953 Psychologists: Eugene Aserinsky and Nathaniel KleitmanAserinsky noticed periods of eye movement in sleeping babiesTheorized that these periods of active eye movement were associated with periods of dreamingDecided to expand the research to see if adults’ eye movement was also associated with dreaming
3The Experiment & Results 20 adults participatedSubjects were awakenedAsked if they had been dreaming and what their dream wasTotal of 27 awakenings during the experiment: 20 vividly recalled dreams, 7 only recalled having dreamtAserinsky discovered the concept of rapid eye movement sleep- REM sleep
4The effect of dream deprivation, 1960 Psychologist: William DementDement realized that everyone dreams a substantial amountWould it be possible for human beings to function normally when deprived of dreams?
5The Experiment & Results 8 men ages 23-32Recorded baseline sleep cycle- 7 hours per night on average, 19.5% dreamingWoken up right before entering REM sleepNumber of times the subjects were woken up from REM sleep increased as the experiment progressedPost-experiment, total dream time increased to 26%
6Significance of each Experiment & Subsequent Research Aserinsky’s discovery of REM sleep led to researchers improving their understanding of sleepFour stages of sleep, after which the body moves back through the stages, reaches REM sleepDuring REM sleep, the body undergoes sleep paralysisAll humans dream, even if they don’t remember dreamsDement discovered REM rebound effect
7Ethical Issues & Recent Applications Both Aserinsky’s and Dement’s experiments involved waking subjects up frequently during the night, thereby depriving them of sleepDement wasn’t sure of the possible long-term effects of dream deprivationcontrolled this by only depriving subjects for a few nights and then allowing a recovery periodA recent study found REM sleep is necessary for better learningDaytime sleep produces different REM patterns than nighttime sleep