P Lec Notes 092810 - Psych Lecture Notes 09/28/10...

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Psych Lecture Notes 09/28/10 Consciousness Part One Consciousness: The awareness of internal and external stimuli Circadian Cycles -Individuals have different internal clocks -Most run on a 24 hour cycle -Almost all are set for sleep at night -Night time sleepiness: 2am-6am peak -Siesta Zone: 1-4pm -Programmed for naps Sleeping and Dreaming -Functions of Sleep -Memory Consolidation -Energy Conservation -Helps restore bodily functions Sleep Deprivation -decrease immune functions -leads to hallucinations and perceptual disorders -less alert and attentive -more irritable -ability to perform simple tasks declines Stages of Sleep -Non REM (Rapid Eye Movement) Sleep -Stage 1: Light sleep, small irregular brain waves, muscles relax -Stage 2: high peaking waves, sleep spindles, burst of electrical activity -Stage 3: Deep sleep, Delta waves, slow with high peaks -Stage 4: Progressively more Delta Waves (Deep sleep) -Cycle: 1, 2, 3, 4, 3, 2, REM REM Sleep -Rapid Eye Movement Sleep: active brainwaves, increased heart rate and blood pressure, limp muscle state -80% of REM is dream sleep -Alternates on 90 minute cycles Developmental Issues with Sleep -Newborns and Infants: 50% of sleep is REM -By age 3-5 it is more like 20% of overall sleep which is more similar to the adult level
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P Lec Notes 092810 - Psych Lecture Notes 09/28/10...

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