020107_Consc2_post - States of Consciousness Sleep Sleep A...

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Unformatted text preview: States of Consciousness Sleep Sleep A typical nights sleep Why do we sleep? What causes sleep? Circadian Rhythms Sleep deprivation & restoration Individual differences Need for sleep Morningness Sleep disorders Stages of Sleep Awake: Beta Relaxed: Alpha Stage 1: Theta body jerks Stage 2: Sleep spindles Stage 3: 20% Delta Stage 4: All Delta REM: Alpha waves, eye movements, paradoxical sleep A Typical Nights Sleep Why do we sleep? Sleep is necessary Links to immune functioning Restorative process Adenosine? Evolutionary: Increases chance of survival Circadian Rhythm Circadian rhythm: daily cycle of behavior and physiology Physiology Body temperature Hormone release Urine production Mental activity General alertness Sensory processing Cognitive performance Circadian Rhythm Two peaks in sleepiness One at night bedtime One in the early afternoon Circadian Rhythm External stimuli affect rhythm Eating, activities Example: light and melatonin Eyes connected to SCN (suprachiasmatic nuclei in hypothalamus) SCN activity inhibits pineal gland Pineal gland releases melatonin Melatonin: hormone associated with sleepiness/relaxation Circadian Rhythm 25-hour clock...
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This note was uploaded on 04/07/2008 for the course PSYCH 101 taught by Professor Passer during the Spring '07 term at University of Washington.

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020107_Consc2_post - States of Consciousness Sleep Sleep A...

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