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PSYC 2410 (149)
Chapter 14

Chapter 14 - part1.doc

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University of Guelph
PSYC 2410
Boyer Winters

Chapter 14part 1 356369Sleep Dreaming and Circadian RhythmsThe Case of the Woman Who Wouldnt SleepMiss MoBecomes tired when she needs to sit down to rest her legsoDoes not ever report feeling sleepyoShe sleeps 200am to 300am and when she wakes feels wide awakeoShe does not sleep at all if she has interesting things to dooResearchers attached EEG electrodes to hero130am she showed the first signs of sleep lasted for 99 minutesoAfterwards she had no further interest in sleepingStages of SleepThree Standard Psychophysiological Measures of Sleep1Electroencephalogram EEG2Electrooculogram EOG3Electromyogram EMGFour Stages of Sleep EEGInitial Stage 1 EEG alpha waveswaxing and wandering bursts of 8 to 12Hz EEG wavesbegin to punctuate the lowvoltage highfrequency waves of alert wakefulness low voltage high frequency signal that is similar to but slower than that of alert wakefulnessStage 2 Punctuated by two characteristic wave forms K complexeslarge negative wave upward direction followed by a single large positive wave and sleep spindlesa 12 second waxing and waning burst of 12 to 14Hz waves higher amplitude and a lower frequency than the stage 1 EEGStage 3 occasional presence of delta wavesthe largest and slowest EEG waves frequency 12 HzStage 4 Predominance of delta waves sleepers are here for a long time then retreat backwards to stage 1
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