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Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band

To behave adaptively with sufficient flexibility, biological organisms must cognize beyond immediate reaction to a physically present stimulus. For this, humans use visual mental imagery [1, 2], the ability to conjure up a vivid internal experience from memory that stands in for the percept of the s...

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Detalles Bibliográficos
Autores principales: Xie, Siying, Kaiser, Daniel, Cichy, Radoslaw M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cell Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7342016/
https://www.ncbi.nlm.nih.gov/pubmed/32531274
http://dx.doi.org/10.1016/j.cub.2020.04.074
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author Xie, Siying
Kaiser, Daniel
Cichy, Radoslaw M.
author_facet Xie, Siying
Kaiser, Daniel
Cichy, Radoslaw M.
author_sort Xie, Siying
collection PubMed
description To behave adaptively with sufficient flexibility, biological organisms must cognize beyond immediate reaction to a physically present stimulus. For this, humans use visual mental imagery [1, 2], the ability to conjure up a vivid internal experience from memory that stands in for the percept of the stimulus. Visually imagined contents subjectively mimic perceived contents, suggesting that imagery and perception share common neural mechanisms. Using multivariate pattern analysis on human electroencephalography (EEG) data, we compared the oscillatory time courses of mental imagery and perception of objects. We found that representations shared between imagery and perception emerged specifically in the alpha frequency band. These representations were present in posterior, but not anterior, electrodes, suggesting an origin in parieto-occipital cortex. Comparison of the shared representations to computational models using representational similarity analysis revealed a relationship to later layers of deep neural networks trained on object representations, but not auditory or semantic models, suggesting representations of complex visual features as the basis of commonality. Together, our results identify and characterize alpha oscillations as a cortical signature of representations shared between visual mental imagery and perception.
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spelling pubmed-73420162020-07-14 Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band Xie, Siying Kaiser, Daniel Cichy, Radoslaw M. Curr Biol Article To behave adaptively with sufficient flexibility, biological organisms must cognize beyond immediate reaction to a physically present stimulus. For this, humans use visual mental imagery [1, 2], the ability to conjure up a vivid internal experience from memory that stands in for the percept of the stimulus. Visually imagined contents subjectively mimic perceived contents, suggesting that imagery and perception share common neural mechanisms. Using multivariate pattern analysis on human electroencephalography (EEG) data, we compared the oscillatory time courses of mental imagery and perception of objects. We found that representations shared between imagery and perception emerged specifically in the alpha frequency band. These representations were present in posterior, but not anterior, electrodes, suggesting an origin in parieto-occipital cortex. Comparison of the shared representations to computational models using representational similarity analysis revealed a relationship to later layers of deep neural networks trained on object representations, but not auditory or semantic models, suggesting representations of complex visual features as the basis of commonality. Together, our results identify and characterize alpha oscillations as a cortical signature of representations shared between visual mental imagery and perception. Cell Press 2020-07-06 /pmc/articles/PMC7342016/ /pubmed/32531274 http://dx.doi.org/10.1016/j.cub.2020.04.074 Text en © 2020 The Author(s) http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xie, Siying
Kaiser, Daniel
Cichy, Radoslaw M.
Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title_full Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title_fullStr Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title_full_unstemmed Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title_short Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band
title_sort visual imagery and perception share neural representations in the alpha frequency band
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7342016/
https://www.ncbi.nlm.nih.gov/pubmed/32531274
http://dx.doi.org/10.1016/j.cub.2020.04.074
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