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Module 5 & 6 - Lecture.docx

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PSYC 1000
Dan Meegan

September 24, 2012 Module 5: Tools of Discovery and Older Brain Structures - By looking at the structure and activity of the brain: CAT, ARI, fMRI, and PET scans o We can find what happens when parts of the brain is damaged or otherwise unable to work properly - Strategies for finding out what is different about the mind when part of the brain isn’t working: o Case studies of accidents – Phineas Gage; most famous psychological testing patient o Case studies of split-brain patients (corpus callosum cut out to stop seizures) o Lesioning brain parts in animals to find out what happens o Chemical numbing magnetically deactivating or electrically stimulating parts of the brain - Phineas Gage o Brain damage to the frontal lobe  Lost ability to make good decisions  Different personality  No change in vision  We know that the frontal lobe is in control of the personality and decision making - Parts of the brain, and even neurons can be stimulated electrically, chemically or magnetically o This can result in behaviors such as giggling, head turning, or simulated vivid recall - Modern Technology o EEFG: electroencephalogram  Recording of electrical waves sweeping across the brain’s surface  Useful in studying seizers and sleep o PET: position emission tomography  Allows us to see what part
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