An event-related fMRI investigation of phonological versus semantic short-term memory

Randi C. Martin, Denise Wu, Monica Freedman, Edward F. Jackson, Mary Lesch

研究成果: 雜誌貢獻期刊論文同行評審

55 引文 斯高帕斯(Scopus)

摘要

Studies with normal and brain damaged subjects have indicated that there are semantic as well as phonological contributions to verbal short-term memory. An event-related functional MRI study was carried out to determine if different brain regions would be activated during the delay period in a phonological vs. a semantic retention task. A recognition probe procedure was used in which memory load and task (i.e. rhyme judgment vs. synonym judgment) were manipulated. A left inferior parietal region overlapping the supramarginal gyrus was more activated in the phonological than the semantic task. A large left inferior and mid-frontal region and another left parietal region showed a load effect that was common to the phonological and semantic tasks. No region showed significantly greater activation in the semantic than the phonological task, though there was a trend towards a more anterior localization of the frontal load effect in the semantic task compared to the phonological task.

原文???core.languages.en_GB???
頁(從 - 到)341-360
頁數20
期刊Journal of Neurolinguistics
16
發行號4-5
DOIs
出版狀態已出版 - 2003

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