Consciousness [PSY 301]

Consciousness [PSY 301] - Consciousness 1. Things within...

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Consciousness 1. Things within our awareness 2. We have consciousness: a. to monitor the self and the environment 3. Not one center of consciousness: a. different parts of the brain are involved in different kinds of awareness b. relies on brain areas involved in interpreting and integrating information i. primarily: right parietal and frontal l lobes 1
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4. Things outside of our awareness may be: a. nonconscious b. preconscious c. unconscious 5. Aspects of Consciousness: a. responsiveness b. cognitive capacity c. personality 2
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Normal Waking Consciousness 1. Attention : the process of separating the conscious from the preconscious. 1. selective attention: paying attention to one thing 2. divided attention: splitting attention between two things 3. limited processing capacity: allocating attention among several things. 4. automatic vs. controlled processing a. automatic: does not require attention b: controlled: requires attention 3
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Sleep : major daily alteration in consciousness 1. EEG studies show that sleep contains several stages 2. Stages of N-REM Sleep a. Stage I: falling asleep i. deep regular breathing iii. hypnologic imagery iv. hypnic jerk v. regulated partly by melatonin b. Stage II : clearly asleep i. sleep spindles and K-complex ii: hard to waken c. Stage III: i. delta waves (slow-wave sleep): slow high amplitude waves ii. heart rate and body temperature drop 4
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d. Stage 4: i. mostly delta wave ii. body functions slow down to their lowest levels iii. difficult to wake; disoriented iv. sleep walking, talking, bed wetting, night terrors 5
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3. REM Sleep (Rapid Eye movement) a. paradoxical sleep i. rapid eye movements ii. waking brain waves iii. muscle paralysis b. REM-dreams i. have NREM dreams, but fewer and qualitatively different ii. nightmares iii. Everyone dreams(4-5 a night) iv. REM is associated with right hemisphere activity v. no dreams if the frontal cortex is disconnected from the brain stem and limbic system vi. REM sleep is essential to learning vii. more REM during times of stress, high emotion, or many new experiences viii. REM rebound: more REM after REM-deprivation 6
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4. Sleep Cycle: a. Stages 1- IV Stage IV-Stage 2 REM Stages 2-4 b. Over course of the night, REM intervals get longer and NREM gets shorter c. Stage IV falls out after about 4 hours of sleep d. biochemistry i. release of the hormone melatonin promotes sleep a. released from dusk to dawn ii. release of acetylcholine suppressed in NREM but activated in REM iii. release of serotonin and norepinephrine suppressed in NREM but activated in REM 7
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Why do we dream? 1.
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This note was uploaded on 03/19/2008 for the course PSY 301 taught by Professor Pennebaker during the Spring '07 term at University of Texas at Austin.

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Consciousness [PSY 301] - Consciousness 1. Things within...

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