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• W3127905846 abstract "Abstract Previous studies demonstrated that long-term memory related to object-position in natural scenes guides visuo-spatial attention during subsequent search. Memory-guided attention has been associated with the activation of memory regions (the medial-temporal cortex) and with the fronto-parietal attention network. Notably, these circuits represent external locations with different frames of reference: egocentric (i.e., eyes/head-centered) in the dorsal attention network vs. allocentric (i.e., world/scene-centered) in the medial temporal cortex. Here we used behavioral measures and fMRI to assess the contribution of egocentric and allocentric spatial information during memory-guided attention. At encoding, participants were presented with real-world scenes and asked to search for and memorize the location of a high-contrast target superimposed in half of the scenes. At retrieval, participants viewed again the same scenes, now all including a low-contrast target. In scenes that included the target at encoding, the target was presented at the same scene-location. Critically, scenes were now shown either from the same or different viewpoint compared with encoding. This resulted in a memory-by-view design (target seen/unseen x same/different view), which allowed us teasing apart the role of allocentric vs. egocentric signals during memory-guided attention. Retrieval-related results showed greater search-accuracy for seen than unseen targets, both in the same and different views, indicating that memory contributes to visual search notwithstanding perspective changes. This view-change independent effect was associated with the activation of the left lateral intra-parietal sulcus. Our results demonstrate that this parietal region mediates memory-guided attention by taking into account allocentric/scene-centered information about the objects' position in the external world." @default.
• W3127905846 created "2021-02-15" @default.
• W3127905846 creator A5020553938 @default.
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• W3127905846 creator A5079975504 @default.
• W3127905846 date "2021-02-03" @default.
• W3127905846 modified "2023-09-30" @default.
• W3127905846 title "The lateral intraparietal sulcus takes viewpoint changes into account during memory-guided attention in natural scenes" @default.
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• W3127905846 doi "https://doi.org/10.1007/s00429-021-02221-y" @default.
• W3127905846 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8036207" @default.
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