PSYC 107 1nd Edition Lecture 9 Outline of Last LectureI. History of ConsciousnessII. Dual ProcessingIII. Selective AttentionIV. Sleep and DreamsV. Measuring SleepOutline of Current LectureI. Sleep StagesII. Why Do We Sleep?III. Sleep DisordersIV. DreamsCurrent LectureI. Sleep StagesSleep StageRem or NremFeatures1 Non-Rem Light sleep, hypnic mayoclonia (jerking right before falling asleep), hypanagogic imagery (vivid imagery before you fall asleep)2 Non-Rem Sleep spindles, K-complexes, sleep talking3 and 4 Non-Rem Deep sleep, delta waves, sleep walking5 REM Muscle paralysis, penile, erection/vaginal secretions-REM behavior disorder: a rare condition when the messages from the brain are not blocked from going to the rest of the body.-REM: is biologically necessaryoWhen deprived of REM, people will stay in REM for longer periods of time when they are allowed to sleep; scientist think that the brain wants to make up REM sleep.-Which each 90-minute cycle, stage 4 sleep decreases and the duration of REM sleep increases.oEventually gets to the point where stage 3 and 4 sleep stages do not occur anymore.II. Why do we sleep?-Sleep protects: our ancestors needed to sleep at night to protect themselvesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-Sleep recuperates-Sleep helps remembering-Sleep and growthIII. Sleep disorders:-Insomnia: persistent inability to fall asleepo30% of population complain about this problemoSelf-report not good way of assessing sleep-Narcolepsy: oOverpowering urge to fall asleep that may occur while talking or standing up-Sleep apnea: failure to breathe when asleepo1-4% have this problem but many are unawareoMore common with overweight men-Night Terrors:oSudden arousal of sleep with intense fear accompanied by physiological reactions (rapid heart rate, perspiration)oUsually happens at sleep stage 4oChildren usually do not remember sleep terrors-Sleepwalking:oUsually harmless and unrecalled the next dayoMore common in childrenoMost often occurs during stage 4oSleepwalking can be a crime defenseCase of Kenneth Parks-1987, drove 12 miles to in-laws house and killed his mother-in-law and put his father-in-law in critical condition-Turned himself into police-Claimed he was sleep walking-Was acquitted due to history of sleepwalking-SleeptalkingoUsually runs in families like sleepwalkingoOccurs in stages 2 to 4IV. Dreaming-Everyone dreams unless they have had frontal lobe damage-When we dream:oDuring REM story-likeoStage 4: more daily
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