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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Cell Press
2020
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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. |
format | Online Article Text |
id | pubmed-7342016 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Cell Press |
record_format | MEDLINE/PubMed |
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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