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Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm

In the phenomenon of perceptual filling-in, missing sensory information can be reconstructed via interpolation or extrapolation from adjacent contextual cues by what is necessarily an endogenous, not yet well understood, neural process. In this investigation, sound stimuli were chosen to allow obser...

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Autores principales: Cervantes Constantino, Francisco, Simon, Jonathan Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727537/
https://www.ncbi.nlm.nih.gov/pubmed/29235479
http://dx.doi.org/10.1038/s41598-017-17063-0
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author Cervantes Constantino, Francisco
Simon, Jonathan Z.
author_facet Cervantes Constantino, Francisco
Simon, Jonathan Z.
author_sort Cervantes Constantino, Francisco
collection PubMed
description In the phenomenon of perceptual filling-in, missing sensory information can be reconstructed via interpolation or extrapolation from adjacent contextual cues by what is necessarily an endogenous, not yet well understood, neural process. In this investigation, sound stimuli were chosen to allow observation of fixed cortical oscillations driven by contextual (but missing) sensory input, thus entirely reflecting endogenous neural activity. The stimulus employed was a 5 Hz frequency-modulated tone, with brief masker probes (noise bursts) occasionally added. For half the probes, the rhythmic frequency modulation was moreover removed. Listeners reported whether the tone masked by each probe was perceived as being rhythmic or not. Time-frequency analysis of neural responses obtained by magnetoencephalography (MEG) shows that for maskers without the underlying acoustic rhythm, trials where rhythm was nonetheless perceived show higher evoked sustained rhythmic power than trials for which no rhythm was reported. The results support a model in which perceptual filling-in is aided by differential co-modulations of cortical activity at rates directly relevant to human speech communication. We propose that the presence of rhythmically-modulated neural dynamics predicts the subjective experience of a rhythmically modulated sound in real time, even when the perceptual experience is not supported by corresponding sensory data.
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spelling pubmed-57275372017-12-18 Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm Cervantes Constantino, Francisco Simon, Jonathan Z. Sci Rep Article In the phenomenon of perceptual filling-in, missing sensory information can be reconstructed via interpolation or extrapolation from adjacent contextual cues by what is necessarily an endogenous, not yet well understood, neural process. In this investigation, sound stimuli were chosen to allow observation of fixed cortical oscillations driven by contextual (but missing) sensory input, thus entirely reflecting endogenous neural activity. The stimulus employed was a 5 Hz frequency-modulated tone, with brief masker probes (noise bursts) occasionally added. For half the probes, the rhythmic frequency modulation was moreover removed. Listeners reported whether the tone masked by each probe was perceived as being rhythmic or not. Time-frequency analysis of neural responses obtained by magnetoencephalography (MEG) shows that for maskers without the underlying acoustic rhythm, trials where rhythm was nonetheless perceived show higher evoked sustained rhythmic power than trials for which no rhythm was reported. The results support a model in which perceptual filling-in is aided by differential co-modulations of cortical activity at rates directly relevant to human speech communication. We propose that the presence of rhythmically-modulated neural dynamics predicts the subjective experience of a rhythmically modulated sound in real time, even when the perceptual experience is not supported by corresponding sensory data. Nature Publishing Group UK 2017-12-13 /pmc/articles/PMC5727537/ /pubmed/29235479 http://dx.doi.org/10.1038/s41598-017-17063-0 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Cervantes Constantino, Francisco
Simon, Jonathan Z.
Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title_full Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title_fullStr Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title_full_unstemmed Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title_short Dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
title_sort dynamic cortical representations of perceptual filling-in for missing acoustic rhythm
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5727537/
https://www.ncbi.nlm.nih.gov/pubmed/29235479
http://dx.doi.org/10.1038/s41598-017-17063-0
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