PSYC 107 1nd Edition Lecture 9 Outline of Last Lecture I History of Consciousness II Dual Processing III Selective Attention IV Sleep and Dreams V Measuring Sleep Outline of Current Lecture I Sleep Stages II Why Do We Sleep III Sleep Disorders IV Dreams Current Lecture I Sleep Stages II Sleep Stage Rem or Nrem Features 1 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 talking 3 and 4 Non Rem Deep sleep delta waves sleep walking 5 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 necessary o When 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 o Eventually gets to the point where stage 3 and 4 sleep stages do not occur anymore Why do we sleep Sleep protects our ancestors needed to sleep at night to protect themselves These 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 III IV Sleep recuperates Sleep helps remembering Sleep and growth Sleep disorders Insomnia persistent inability to fall asleep o 30 of population complain about this problem o Self report not good way of assessing sleep Narcolepsy o Overpowering urge to fall asleep that may occur while talking or standing up Sleep apnea failure to breathe when asleep o 1 4 have this problem but many are unaware o More common with overweight men Night Terrors o Sudden arousal of sleep with intense fear accompanied by physiological reactions rapid heart rate perspiration o Usually happens at sleep stage 4 o Children usually do not remember sleep terrors Sleepwalking o Usually harmless and unrecalled the next day o More common in children o Most often occurs during stage 4 o Sleepwalking can be a crime defense Case of Kenneth Parks 1987 drove 12 miles to in laws house and killed his mother inlaw 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 Sleeptalking o Usually runs in families like sleepwalking o Occurs in stages 2 to 4 Dreaming Everyone dreams unless they have had frontal lobe damage When we dream o During REM story like o Stage 4 more daily task
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