Psych - Unit 2 - 2/26/2008 Friday, February 22, 2008 10:40...

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2/26/2008 Friday, February 22, 2008 10:40 AM Skip reading pages 54-67 More in the margin (black more than blue)   Methods used in physiological psychology: 1. Clinical: study the effect of disease, injury or disability. Examples) Stroke survivors, people with brain damage Mostly quasi-experiments (can't impose the disease or injury) and clinical  case studies --> reliability problems Increased probability of error Not possible to do true experiments Mostly human Ss.   o Examples Paul Broca's speech center Man came in without the ability to speak, used to be able to When he died, Broca did an autopsy on the brain and there was a  tumor the size of a walnut on a small part of the brain Figured that maybe that was the part of the body that controlled  speech Wrote it in a journal, still commonly called Broca's speech center Not the only speech center but most important Phineas Gage (1848) and Egas Moniz. Phineas, a foreman, was hit with a metal bar in the head while  working on the road Recovered and went back to work Before the accident he was a leader and good guy, afterwards, he  became very short tempered and explosive, unreliable, complete opposite Somebody wrote it up and put it in a journal and it just sat there Around 1920, Egas Moniz saw the report on Phineas and said that  the severed nerve bundles on the front of the cortex must be to blame Thought that if they severed the bundles on people with  personality disorders then it may be therapeutic Prefrontal lobotomy No way to predict who will get better and those who do are a  minority
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After this, the whole notion of doing the lobotomy left Hippocampus This guy was going to die, H.M. Didn’t know what it does Everybody has 2 of them, he had both of them removed Not short term memory, that’s only about 20 seconds He remembers everything  from before the surgery but blank after  the surgery New Long Term Memory Can't retain anything after the surgery Lost the capacity Arguments for HM Declared and Procedural memory Declared memory Stored information, facts, knowledge Procedural memory Skills (riding a bike, swim) Helped show that the two are not in the same part of the brain Alzheimer's  Begins in the hippocampus, then moves through the brain Only involves the back of the brain in the final stages Because of HM they knew to look in the hippocampus 2. E xperimental: render a given area of the brain nonfunctional. Examples include surgery,  drugs, anesthetic, freezing techniques, etc. 
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This note was uploaded on 04/10/2008 for the course PSYCH 1000 taught by Professor Mcdonald during the Spring '08 term at Missouri (Mizzou).

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Psych - Unit 2 - 2/26/2008 Friday, February 22, 2008 10:40...

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