Fr[~tital-lobe activatioti diiririg scmaritic mentory perfortpiatice ivas exariiitied irsirig fiirictiotial riiagnetic resoriarice iriiagirig cfn f R I ) , a rioriirivasive techrtiqire fir localizirig rieirral activity associated witti cogriitive jirrictiori. Leji ir$irior prefrotito1 cortex IWIS triore activated f.r seriiaritic tlion for perceptiral ericodirig of words, arid for initial tliari for repecited seriiaritic ericoditig of words. Decreased activatioti fiir seriiiiritic ericodirig of repeated words reflects repetition pririiirig, tliat is, iriiplicit retrieval of nieniory gaitied iri the itlitid seriiiititic ericoding of a word. The left irlferior prefrorital regiorr rriay s i b serve semaritic 1L'orXiiig riieriioty processes that participate iri seriiaritic encodirig ntid that have decreased derriorids wheri sircli cncodirrg cciri be facilitciteti by recent seriiaritic experietice. These resitlts deriioristrnte that j M R 1 cati visiriilize clioriges in an iridividirol's bmiri jiinctiort associated with the ericoclitig arid retriever1 of riew memories.

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