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Lecture 9

PSYC37- Lecture 9.docx

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Anthony Ruocco

PSYC37- March 20, 2012 Neuropsychological Assessment and Screening (late to class)  Atrophy of the corpus callosum- easily visible on an MRI; agenesis of the corpus callosum means to not have any corpus callosum; corpus callosum is often studying using split brain patients;  The case of EA; in May, 2003, she and her husband (also ill) departed Arizona to move in with their son in Chicago after their daughter left the state and was no longer able to provide care; cognitive and emotional problems; memory difficulties; labile affect- refers to unstable emotion (uncontrollable episodes of laughter and crying);  Patient from video- dysarthria (speech impediment, almost sounds mentally retarded); laughs uncontrollably which seems to really bother her; psychiatric history includes: alcohol abuse in the 1980s, quit smoking in her mid-40s, possible sexual abuse as a child; had to hold railings when she walked because her gait was a wide based gait (indicative of cerebellar problems); could not focus attention for very long;  Family history included a sister with schizophrenia diagnosed 40 years ago and institutionalized; mother and father were unlikely to have any dementia; developmental/social/educational history: born prematurely, held back in the second grade, performed poorly throughout school, graduated from high school, initially employed as a receptionist, then went to back to college for one year, worked as a nanny until retirement, has three children who are in good health  Doesn’t have the strongest cognitive reserve;  Behavioural Observations & Mental Status (9/2007)- wide-based and unsteady gait, ataxic dysarthria  Corpus callosum is a large bundle of nerve fibres (~4 inches long) that integrates the functions of the two cerebral hemispheres; connects the homologous sites in the left and right hemispheres  Cerebral cortex (aka “neocortex”)- frontal lobe, parietal lobe, occipital lobe, temporal lobe; different parts of the brain interact with each other to process information; motor control, reasoning, and judgment, are functions of the frontal lobe; parietal lobe- somatosensory information processing (taking in and integrating information from the senses and perception); occipital lobe- visual perception; temporal lobe- auditory information processing, as well as some structures involved in memory (epilepsy);  Conceptual model of brain-behaviour relationships- attention and concentration (how well you learn, concentrate on a task); memory and learning (able to acquire and retain information); hemispheres- different cognitive abilities; executive functions- considered the highest level of cognitive function; motor output- provide information to figure out if answer is right/wrong or slow/fast  Neuropsychological test results- intellectual function (WAIS-III Index Scores- Full Scale IQ: 77, Verbal IQ: 81, Performance IQ: 75); Subtest Scores- Similarities: 6, Arithmetic: 7, Digit Span: 11, Information: 4, Picture Completion: 6, Digit Symbol: 5, Block Design: 7  Intelligence is lower than one standard deviation from the mean; subtest scores have a mean of ten and a standard deviation of three; since information is the lowest score, it could tell us that she didn’t learn very much in school perhaps due to a learning disability; digit span is her highest score which tells us that her ability to maintain attention is present;  Achievement function- WRAT-4: Reading- Raw:56, SS:91, %ile:27, Grade:11.4; she may have a low to low average range of co
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