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Ch 17 Learning and memory.doc

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Simon Fraser University
PSYC 280
John Reynolds

Ch 17 Learning and memoryKinds of memory and learning Check fig 1717 pg 541 for simple flow chart of the types of memoriesLearning process of acquiring new info Memory ability to store and retrieve that infoPatient HM damaged medial temporal lobesunable to encode new memoriessuffered amnesiaMemory deficit caused from loss of hippocampus After doing a mirrortracing task his memory improved over 10 trialsEven though he doesnt remember doing the tasks his body does in the form of motor skillsHad difficulty reproducingrecognizing pictures that arent recalled in verbal termshe has difficulty with specific content of verbal material but can learn some info about verbal material eg pple with amnesia can learn the skill of reading mirrorrevered text but not learning the specific wordsSO the distinction is not between motor and verbal performance but 2 kinds of memoryDeclarative memory facts and info acquired through learning memory is assesseddeclaringtellingNondeclarativeprocedural memory memory on perceptualmotor procedures shown by performancedoing rather than by conscious recollection eg mirror tracing mirror reading biking jugglingRetrograde amnesia loss of memories formed before an event like surgerytraumaAnterograde amnesia inability to form new memories after an eventDeclarative larger memory involved in temporal lobe and diencephalon thalamus and hypothalamusPatient NA anterograde amnesia verbal material declarative longterm memoryKorsakoffs syndrome anterograde amnesia for declarative memories deny that they have something wrong and confabulate fill in a gap in memory with false info they seem to accept as trueCaused from lack of vitamin thiamine and from alcoholics feeding thiamine wont guaranteefixing previous damage of memory but can stop further deterioration in memoryTemporal lobe hippocampusnormalDamages shrunken diseased mammilarian bodies processing system connecting temporal regions to thalamus w mammillothalamic tract and damaged dorsomedial thalamus damage to medial diencephalicDamage to basal frontal cortex causes the denial and confabulationBrain damage can destroy autobiolographical memories while sparing general memories2 subtypes of declarative memoryEpisodic memory detailed autobiographical declarative memory show episodic memory where you recall a specific episode in your life or relate an event to a certain time and placeSemantic memory generalized declarative memory eg know meaning of a word but dunno wherewhen you learned itPatient KC cant retrieve personal memory of his past but general memory is goodhas semantic memoryDamage to cerebral cortex and shrinkage in hippocampus and parahippocampl cortexHippocampus damage accounts for anterograde declarative amnesia not for selective loss of his autobiographical memory retrograde episodic amnesiaPple w good longterm episodic memory remember what they ate on 1998have larger temporal lobes larger parahippocampal gyrusDifferent forms of nondeclarative memory has many functionsSkill learning perform challenging tasks on repeated trials in one or more sessions eg mirrortracing
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