9 - sleep and biological rhythms

9 sleep and - A Physiological and Behavioral Description of Sleep 18:17 Stages of Sleep Electromyogram(EMG An electrical potential recorded from an

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A Physiological and Behavioral Description of Sleep 18:17 Stages of Sleep Electromyogram (EMG): An electrical potential recorded from an electrode  placed on or in a muscle o Electro-oculogram (EOG): An electrical potential from the eyes, recorded  by means of electrodes placed on the skin around them Detects eye movements Alpha activity: Smooth electrical activity of 8-12 Hz recorded from the brain o Generally associated with a state of relaxation  o Beta activity: Irregular electrical activity of 13-30 Hz recorded from the  brain Generally associated with a state of arousal Theta activity: EEG activity of 3.5-7.5 Hz that occurs intermittently during early  stages of slow-wave sleep and REM sleep Delta activity: Regular, synchronous electrical activity of less than 4 Hz  recorded from the brain o Occurs during the deepest stages of slow-wave sleep o Slow-wave sleep: Non-REM sleep, characterized by synchronized EEG  activity during its deeper stages  Down state: A period of inhibition during a slow oscillation during slow-wave  sleep o Neurons in the neocortex are silent and resting o Up state: A period of excitation during a slow oscillation during slow-wave  sleep Neurons in the neocortex briefly fire at a high rate REM sleep: A period of desynchronized EEG activity during sleep, at which  time dreaming, rapid eye movements, and muscular paralysis occur o Paradoxical sleep Non-REM sleep: All stages of sleep except REM sleep Mental Activity During Sleep
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Disorders of Sleep 18:17 Insomnia
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This note was uploaded on 11/16/2010 for the course PSYC 301 taught by Professor Yager during the Fall '10 term at Maryland.

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9 sleep and - A Physiological and Behavioral Description of Sleep 18:17 Stages of Sleep Electromyogram(EMG An electrical potential recorded from an

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