Textbook Notes (368,150)
Canada (161,680)
Psychology (9,695)
PSYB57H3 (366)
George Cree (102)
Chapter 2

Chapter 2 - The Neural Basis for Cognition

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George Cree

PSYB57Chapter 2 The Neural Basis for Cognition Each part of the brain has its own specialized function so that our behaviors thoughts and feelings almost invariably depend on the coordinated action of many brain regions Capgras Syndrome An Initial ExampleDamage to any part of the brain will produce specific and highly disruptive symptomsCapgras syndromeo Rare on its own but seems to be accompanied by Alzheimerso Someone which Capgras syndrome is fully able to recognize the people in his or her world but is utterly convinced that these people are not who they appear to beFacial recognition involves two separate systems in the brain which lead to cognitive and emotional appraisals o Concordance of these two appraisals then leads to the certainty of recognition o In Capgras syndrome the emotional processing is disturbed leading to the intellectual identification without the familiarity responseThe Neural Basis for Capgras Syndrome o Neuroimaging techniquesallow researchers to take three dimensional pictures of the brain without disturbing the brains ownersPET scans tell a great deal about the structure of the brain including the abnormalitiesfMRI allows us to track moment by moment activity levels in different sites of a living brain o Damage to the temporal lobe which disrupts circuits involving the amygdalaAmygdalaemotional evaluator that helps an organism detect stimuli associated with safety or danger y Positive stimuli vs negative stimuliReason as to why Capgras patients experience no sense of familiarity when they look at faces they know o Abnormalities in the frontal lobe specifically in the right prefrontal cortexPatients may be less able to keep track of what is real and what is not what is plausible and what is notReason as to why Capgras patients offer crazy hypotheses about their skewed perception when they experience the lack of familiarityWhat Do We Learn From Capgras Syndrome o Evidence tells us 2 thingsWhere the brain damage is located in Capgras patientsLikely functions of these brain sites when theyre not damaged o Cases like Capgras syndrome are valuable in helping us understand how the brain functions in normal people The Principal Structures of the BrainHindbrain Midbrain Forebrain o The human brain is divided into three main structures the hindbrain the midbrain and the forebrain
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