Physiological+processes+and+mental+states

Physiological+processes+and+mental+states - 11/7/10...

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11/7/10 1 Physiological Processes and Mental States Sleep Dreaming Consciousness-al t ring drugs ( s T mulants, depressants, opia t s, psychedelics ) Hypnosis Biological rhy ± ms and ± eir psychologica l e f ects Sleep and Dreaming • Rest and recover from daily activities • Repair cells / eliminate wastes • Strengthen immune system • Release of growth hormone in children and young adults • Important in learning and consolidating memory WHY DO WE SLEEP?
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11/7/10 2 “Falling asleep” – a gradual decrease in responsiveness to outside stimuli Brain waves become smaller, more irregular Typically lasts 1-7 minutes (2-5% of sleeping time) Stage 1 sleep Stage 2 sleep The period of actual sleep (45-55% of sleeping time) Brain produces occasional short bursts of rapid, high-peak waves called sleep spindles Unlikely to be disturbed by minor noises
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11/7/10 3 Stage 3 sleep Beginning of deep sleep Combined with Stage 4, accounts for 10-25% of sleeping time Brain begins to produce
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Physiological+processes+and+mental+states - 11/7/10...

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