September 2021
Volume 21, Issue 9
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2021
EEG signals represent updated memory representations in working memory
Author Affiliations
  • Young Seon Shin
    Florida Atlantic University
  • Summer Sheremata
    Florida Atlantic University
Journal of Vision September 2021, Vol.21, 2724. doi:
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      Young Seon Shin, Summer Sheremata; EEG signals represent updated memory representations in working memory. Journal of Vision 2021;21(9):2724.

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

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Visual short-term memory (VSTM) creates continuity of representations over time. Working memory, in addition, gives us access to these representations to manipulate or update them. Visual representations stored in VSTM have been successfully reconstructed from measurements of neural activity. However, it is unclear whether the updated state of a remembered item is reflected in these neural representations. To ask this question, we measured alpha-band oscillations (8-12Hz), associated with visual attention, and sustained EEG potentials (<6Hz), associated with visual short-term memory maintenance, while participants remembered and updated a sinusoid gabor in visual short-term memory. In the task, participants were asked to mentally rotate a grating based on a color cue that indicated whether participants should rotate the remembered item 1) clockwise, 2) counter-clockwise, or 3) not at all. We found that reconstructions from sustained EEG (< 6 Hz) reflected updated representations with higher fidelity while alpha-band frequency (8-12Hz) computed broad scope of reconstructions including initial sensory representations. These results suggest that neural signal carries not only the sensory information but also manipulated mnemonic representations.


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