September 2017
Volume 17, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   August 2017
Alpha-Band Activity Tracks Updates to the Content of Spatial Working Memory
Author Affiliations
  • Eren Gunseli
    Department of Psychology, Institute for Mind and Biology, University of Chicago
  • Joshua Foster
    Department of Psychology, Institute for Mind and Biology, University of Chicago
  • David Sutterer
    Department of Psychology, Institute for Mind and Biology, University of Chicago
  • Edward Vogel
    Department of Psychology, Institute for Mind and Biology, University of Chicago
  • Edward Awh
    Department of Psychology, Institute for Mind and Biology, University of Chicago
Journal of Vision August 2017, Vol.17, 337. doi:10.1167/17.10.337
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      Eren Gunseli, Joshua Foster, David Sutterer, Edward Vogel, Edward Awh; Alpha-Band Activity Tracks Updates to the Content of Spatial Working Memory. Journal of Vision 2017;17(10):337. doi: 10.1167/17.10.337.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Prior work has shown that topography of alpha-band activity tracks locations maintained in spatial working memory (WM). Here, we tested whether dynamic changes in alpha activity track the updating of information in spatial WM. Subjects were shown a memory location followed by an auditory cue which instructed subjects to update the location held in memory. Subjects used the mouse to click on the updated location. We used an inverted spatial encoding model to reconstruct the spatially-selective response profiles from the topographic distribution of alpha power. This time-resolved analysis showed that spatially-specific alpha activity tracked the initial location held in working memory, and revealed the transition to the newly updated location. Furthermore, the location specificity of the estimated response profiles, or Channel Tuning Functions (CTFs), showed that subjects with a stronger focus on the updated location were faster to report that location at the end of the trial. These findings highlight a new approach for observing active updating of the contents of spatial WM.

Meeting abstract presented at VSS 2017

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