Exam 4 - Consciousness Sleep Sleep Disorders and Dreams...

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Consciousness Sleep, Sleep Disorders, and Dreams - Wanted: College students for study of sleep o Asked to sleep in sleep labs for $75 a night - Breakthroughs in Sleep Research o Development of the EEG in 1929 by Hans Burger Five stages of sleep o Aserinsky and Kleitman (University of Chicago, 1955) Association of specific sleep stage with dreaming Study of eye movements during sleep (REM= rapid, eye, movement) 74% of people with REM will report a dream 7% of non REM will report a dream - A Night in a Sleep Laboratory o Arrival time and preparation Bring pajamas and toothbrush o Measurements: EEG- measures brain activity EOG- measure eye movement EMG- measures muscle movement 3-6 times of paralysis Penile erections 3-6 times a night EKG- measure heart rate Blood Pressure Hormones Core Body Temperature Breathing Sleep apnea Blood flow (especially in brain) o What have we learned: EEG brain waves: Beta, Alpha, Theta, Delta There are five stages of sleep: Stages 1,2,3,4, and REM NREM stages Stage 1: 2-5% of sleep time Stage 2: 50% of sleep time Stage 3: 3-8% of sleep time (SWS (slow wave sleep) or delta) Stage 4: 10-15% of sleep time (SWS or delta) Commitments
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REM Sleep EEG looks like person is awake High rate of blood flow in brain (highly active) Rapid eye movements (back and forth) Sexual arousal Muscle paralysis (Paradoxical Sleep) Dreams Why do we have REM sleep? o Adults sleep 20-25% in REM o Newborns sleep about 50% of time in REM o Premature babies sleep about 75% in REM o Endogenous stimulation in babies The brain needs stimulation in order to develop - The Infrastructure of Sleep o Sleep Cycle (3-6 throughout night) Descending stages 1 to 4 15 minutes to fall asleep 45 minutes to get to stage 4 Stage 4 Sleeping walking and night terrors Ascending though stage 3, 2, and possibly 1 REM Length of REM across the Night 90 minutes to get to REM REM and SWS have negative correlation REM goes up during night SWS goes down during night o Sleep Parameters Length- 7 hours and less on average (adults) Generally sleep deprived The extremes in sleep Hyposomnia o Less that average amount of sleep (4 hours) o Not complaining about tiredness Hypersomnia o Needs more sleep than the average Sleep in newborn babies 10 to 22 hours per 24 hours Peter Tripp Record for Sleep deprivation Raise money for March of Dimes
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DJ during entire time 200 hours without sleep Under constant super vision by psychiatrists and physicians Core body temperature went down, hallucinations, change in domineer REM sleep while awake accounted for hallucinations Changed individual after 200 hours Randy Gardner Wanted to break world record in 1964 High school science project 206 hours without sleep Sleep researcher from Stanford found out and came to
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Exam 4 - Consciousness Sleep Sleep Disorders and Dreams...

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