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psyc 325 - ch 10 definition - Memory Disorders

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PSYC 325
Mario Liotti

Memory disordersHippocampusAssociated with learning and memoryDamagecan cause anterograde amnesiaMedial Cortical areaassociated with learning and memory temporal lobeDamagecan cause anterograde amnesiaMammillary Subcoritial region associated with learningbodiesDamagecan cause anterograde amnesiaAmnesic Characteristic of amnesic syndrome patientspecific impairment of syndromeencoding new information into both episodic and semantic memory while most other cognitive functions remain intactMany suffer patients suffer common set of problems and spared abilities regardless of whether amnesia was induced by stroke accident head injury tumours infection etcPatientif given list of words to recallwill remember few if any of words if theres more than 30 second delay between time of learning and time of recallalso case if test is recognitionany test that need to be consciously remember new information from episodic memory will result in poor performancePatients can recount events from preinjury life normallyTend to be aware of deficitsaware how it changed their livesstruggle to overcome it Can compensate anterograde amnesia structure lives in ways that are helpful ex common objectsreturn to same place for easy findingpost its cell beep when have to remember somethinggood at doing repetitive tasks job stay close to home Programsclassical and operant conditioningAmnesia induced by permanent brain damagepermanent with recoverylimitedWord Task given some letters of a word but not all and must figure out wordfragment Task can be completed without any reference to pastepisodic pastjust completionmake it into acceptable wordRepetition Effect of presenting a stimulus on processing of that same stimulus at priminglater dateAmnesiacs show normal repetition priming even if dont consciously recall target target dont register in their episodic memorybut processed at same level and their behaviour in implicit test later affected by that experiencemore likely solve word fragment if saw word in another contextnot always aware of connection between earlier experience and present taskimplicit memoryMemory discussion we have with others about the past normalpeople frequently conversationshave theseMedved interviewed people with anterograde amnesia to understand what it was like to be amnesiainterested in coping strategies they use to discuss past events with others when cant retrieve those eventsMedved found 3 coping strategies 1Memory importationmany used amnesiacs described memory from before their injury as if it had happened after the injury2Memory appropriationamnesiac may be able to retrieve event based on someone elses repeated retelling of eventMany cases events can be remembered form semantic memory rather than episodic memory3Memory compensationrather than trying to answer question about the past amnesiacs talk instead about issues that they are having with their amnesic syndrome
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