Consciousness - Consciousness I. Consciousness A. Things...

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Consciousness I. Consciousness A. Things within our awareness B. We have consciousness: 1. to monitor the self and the environment C. Not one center of consciousness: 1. different parts of the brain are involved in different kinds of awareness 2. relies on brain areas involved in interpreting and integrating information a. primarily: right parietal and frontal lobes 1
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D. Things outside of our awareness may be: 1. nonconscious 2. preconscious 3. unconscious E. Aspects of Consciousness: 1. responsiveness 2. cognitive capacity 3. personality 2
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II. Normal Waking Consciousness A. 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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III. Sleep : major daily alteration in consciousness A. EEG studies show that sleep contains several stages 1. Four stages of N-REM (not-REM) sleep and 1 stage of REM sleep B. Stages of N-REM Sleep 1. Stage I: falling asleep a. deep regular breathing b. less regular & lower amplitude brain waves c. hypnogogic imagery d. hypnic jerk e. regulated partly by melatonin 2. Stage II : clearly asleep a. sleep spindles and K-complex b: hard to waken 3. Stage III: a. delta waves (slow-wave sleep): slow high amplitude waves b. heart rate and body temperature drop 4
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4. Stage IV: a. mostly delta wave b. body functions slow down to their lowest levels c. difficult to wake; disoriented d. sleep walking, talking, bed wetting, night terrors 5
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C. REM Sleep (Rapid Eye movement) 1. paradoxical sleep a. rapid eye movements b. waking brain waves c. muscle paralysis 6
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2. 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
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Consciousness - Consciousness I. Consciousness A. Things...

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