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Chapter 4-6

PSY100 Chapter 4-6 Summary Study Guide

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University of Toronto St. George
Dan Dolderman

Chapter 4The mind and consciousness Consciousnessthe subjective experience of the world and of mental activitySplit braincondition in which the corpus callosum is surgically cut and the two hemispheres of the brain do not receive information directly from each otherused to treat brain injuries such as epilepsyif you split the brain do you split the mindpatients still function properly but not normallyThe corpus callosum connects the 2 hemispheres of the brain the only part of the brain that can be cut without damaging the gray matter segment of the spinal cord that is dominated by the cell bodies of neuronsThe right hemisphere controls the left hand better with spatial relationshipsThe left hemisphere controls the right hand better with language skillsPatients with a split brain cannot articulate responses but can pick up what they saw if their vision is distorted and confusedInterpretera left hemisphere process that attempts to make sense of eventsSubliminal perceptioninformation processed without conscious awarenessused in advertisements to make people buy productsFreudian slipwhere an unconscious thought is suddenly expressed at an inappropriate time andor in an inappropriate social context AWARENESS CCC 2012Blindsightcondition in which people who are blind have some spared visual capacities in the absence of any visual awarenesslose vision in the primary visual cortexes but if they are presented with a stimulus in their blind field they can unconsciously perceive important aspects of the stimuluseg if you present a blind person with a moving dot in their blindspot they cant see the dot but they will guess the direction of the movement correctlyAreas of awarenessPrefrontal cortex I understand plansFrontal motor cortex Im all about movementParietal lobe Im aware of spaceTemporal lobe I see and hear thingsOccipital lobe I see thingsSleep Sleep is an altered state of consciousnessThe brain continues to process information from the external world while sleepingThe conscious experience of the outside world turns off during sleep not the brainHowever brain activity slows down and becomes more synchronized4 stages of sleep nonREMabsence of rapid eye movementlittle dreamingvaried EEG activity o Stage 1 theta waves easily aroused o Stage 2 theta waves with bursts of sleep spindles and kcomplexes o Stage 3 delta waveso Stave 4 delta wavesSLOWWAVE SLEEPAfter 90 mins we enter REM sleepREM sleepstage of sleep marked by rapid eye movements dreaming and paralysis of motor systemsDuring REM the sleep cycle reversesreturns to stage 3 then stage 2Throughout the night REM periods get longer and nonREM periods get shorter eventually no stage 4 then no stage 3 etc CCC 2012
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