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      Object selection by automatic spreading of top-down attentional signals in V1

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      Creators
      Ekman, M.
      Lange, F.P. de
      Date of Archiving
      2020
      Archive
      Radboud Data Repository
      DOI
      https://doi.org/10.34973/7rk1-ya87
      Publication type
      Dataset
      Access level
      Restricted access
      Please use this identifier to cite or link to this item: https://hdl.handle.net/2066/225529   https://hdl.handle.net/2066/225529
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      Organization
      PI Group Predictive Brain
      SW OZ DCC CO
      Audience(s)
      Life sciences
      Languages used
      English
      Key words
      fMRI; V1; attention
      Abstract
      What is selected when attention is directed to a specific location of the visual field? Theories of object-based attention have suggested that when spatial attention is directed to part of an object, attention does not simply enhance the attended location but automatically spreads to enhance all locations that comprise the object. Here, we tested this hypothesis by reconstructing the distribution of attention from V1 population neuronal activity patterns in twenty-four human adults (17 female) using functional magnetic resonance imaging (fMRI) and population-based receptive field mapping. We find that attention spreads from a spatially cued location to the underlying object – and enhances all spatial locations that comprise the object. Importantly, this spreading was also evident when the object was not task-relevant. These data suggest that attentional selection automatically operates at an object level, facilitating the reconstruction of coherent objects from fragmented representations in early visual cortex.
      This item appears in the following Collection(s)
      • Datasets [1263]
      • Donders Centre for Cognitive Neuroimaging [3391]
      • Faculty of Social Sciences [27309]
       
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