PSYCH NOTES CH. 5.doc

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Department
Psychology
Course
PSY100H1
Professor
Dax Urbszat
Semester
Winter

Description
Chapter 5 Variations in Consciousnessrepresents the keyword of the subtitle ex circadian rhythmsSomniloquy when people talk in their sleepNarcolepsy a serious sleep disorder in which those who suffer from it often fall asleep uncontrollably during their everyday routineWithout sleep animals dieSleep plays important roles in information retention effectiveness of vaccines immune regulation metabolic controlSleep deprivation has been linked to increased brain sensitivity to negative emotional stimuli The Nature of ConsciousnessConsciousness the awareness of internal and external stimuliEven when asleep or under anesthesia we can maintain some degree of consciousnessStream of consciousness our continuously flowing and changing consciousness coined by William James 1902Variations in Awareness and ControlOne can have attention without consciousness and vice versaMind wandering peoples experience of taskunrelated thoughtsestimated that ppl spend 1550 of their time mind wandering less likely to happen if what youre doing requires significant cognitive resourcesThe difference bw what we control about our mental processes and what just seems to happen is referred to as the diff bw controlled and automatic processescontrolled judgements or thoughts that we exert some control over automatic happens wo our intentional effort or controlConsciousness and Brain ActivityCurrently research suggests that consciousness does not arise from any distinct structure in the brain but rather from activity in distributed networks of neural pathways Thus a great indicator of variationin consciousness is the EEG Electroencephalograph EEG device that monitors the electrical activity of the brain over time by means of recording electrodes attached to the surface of the scalpEEG summarizes the rhythm of cortical activity in the brain in terms of line tracings called brain waves These brain wave tracings vary in amplitude height and frequency cycles per second abbr cpsTypes of brain wave activity based on frequency beta 1324 cps alpha 812 theta 47 cps and delta4 cpsBeta waves increase when cognitive functions are engaged ex problemsolving normal waking thoughts alpha waves increase during relaxation delta waves for deep dreamless sleep theta waves for light sleep Featured Studysee pg 195Biological Rhythms and SleepInitially sleep was considered a lack of phenomena so no one really studied it this changed with the stdiscovery of rapid eye movements REM Fun fact 1 modern lab dedicated to sleep research was founded by Dement of Stanford Uni Biological rhythms periodic fluctuations in physiological functioning
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