PSYC 362 Lecture Notes - Lecture 8: Slow-Wave Sleep, Sleep Paralysis, Fatal Familial Insomnia
14 Aug 2016
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Document Summary
Sleep is a behavior and an altered state of consciousness: sleep is associated with an urge to lie down for several hours in a quiet environments. Few movements occur during sleep (eye movements: the nature of consciousness is changed during sleep. We may recall very little of the mental activity that occurred during sleep. We spend about a third of our lives in sleep: a basic issue is to understand the function of sleep. Electrophysiological instruments can be used in the sleep laboratory to assess the physiological changes that occur during an episode of sleep: muscle tone (emg, summated brain wave activity (eeg) Wakefulness: beta activity (13-20 hz) is present in the eeg record (desynchrony: low amplitude, high frequency waveforms) Eyes closed: alpha activity (8-12 hz) appears in the eeg record (synchrony: high amplitude, low frequency waveforms: eye movements (eog, blood flow to genitals. Theta activity 3. 5-7. 5 hz waves (stage 1 sleep) Sleep spindles 12-14 hz bursts (stage 2 sleep)
