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• W2084946725 abstract "Recent fMRI decoding studies have demonstrated that early retinotopic visual areas exhibit similar patterns of activity during the perception of a stimulus and during the maintenance of that stimulus in working memory. These findings provide support for the sensory recruitment hypothesis that the mechanisms underlying perception serve as a foundation for visual working memory. However, a recent study by Ester, Serences, and Awh (2009) found that the orientation of a peripheral grating maintained in working memory could be classified from both the contralateral and ipsilateral regions of the primary visual cortex (V1), implying that, unlike perception, feature-specific information was maintained in a nonretinotopic manner. Here, we evaluated the hypothesis that early visual areas can maintain information in a spatially specific manner and will do so if the task encourages the binding of feature information to a specific location. To encourage reliance on spatially specific memory, our experiment required observers to retain the orientations of two laterally presented gratings. Multivariate pattern analysis revealed that the orientation of each remembered grating was classified more accurately based on activity patterns in the contralateral than in the ipsilateral regions of V1 and V2. In contrast, higher extrastriate areas exhibited similar levels of performance across the two hemispheres. A time-resolved analysis further indicated that the retinotopic specificity of the working memory representation in V1 and V2 was maintained throughout the retention interval. Our results suggest that early visual areas provide a cortical basis for actively maintaining information about the features and locations of stimuli in visual working memory." @default.
• W2084946725 created "2016-06-24" @default.
• W2084946725 creator A5004974136 @default.
• W2084946725 creator A5072732747 @default.
• W2084946725 date "2014-03-19" @default.
• W2084946725 modified "2023-09-29" @default.
• W2084946725 title "Spatial specificity of working memory representations in the early visual cortex" @default.
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• W2084946725 doi "https://doi.org/10.1167/14.3.22" @default.
• W2084946725 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4527611" @default.
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• W2084946725 hasPublicationYear "2014" @default.
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