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Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments

Multisensory processing is a core perceptual capability, and the need to understand its neural bases provides a fundamental problem in the study of brain function. Both synchrony and temporal order judgments are commonly used to investigate synchrony perception between different sensory cues and mul...

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Autores principales: Love, Scott A., Petrini, Karin, Pernet, Cyril R., Latinus, Marianne, Pollick, Frank E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037859/
https://www.ncbi.nlm.nih.gov/pubmed/30018545
http://dx.doi.org/10.3389/fnhum.2018.00274
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author Love, Scott A.
Petrini, Karin
Pernet, Cyril R.
Latinus, Marianne
Pollick, Frank E.
author_facet Love, Scott A.
Petrini, Karin
Pernet, Cyril R.
Latinus, Marianne
Pollick, Frank E.
author_sort Love, Scott A.
collection PubMed
description Multisensory processing is a core perceptual capability, and the need to understand its neural bases provides a fundamental problem in the study of brain function. Both synchrony and temporal order judgments are commonly used to investigate synchrony perception between different sensory cues and multisensory perception in general. However, extensive behavioral evidence indicates that these tasks do not measure identical perceptual processes. Here we used functional magnetic resonance imaging to investigate how behavioral differences between the tasks are instantiated as neural differences. As these neural differences could manifest at either the sustained (task/state-related) and/or transient (event-related) levels of processing, a mixed block/event-related design was used to investigate the neural response of both time-scales. Clear differences in both sustained and transient BOLD responses were observed between the two tasks, consistent with behavioral differences indeed arising from overlapping but divergent neural mechanisms. Temporal order judgments, but not synchrony judgments, required transient activation in several left hemisphere regions, which may reflect increased task demands caused by an extra stage of processing. Our results highlight that multisensory integration mechanisms can be task dependent, which, in particular, has implications for the study of atypical temporal processing in clinical populations.
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spelling pubmed-60378592018-07-17 Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments Love, Scott A. Petrini, Karin Pernet, Cyril R. Latinus, Marianne Pollick, Frank E. Front Hum Neurosci Neuroscience Multisensory processing is a core perceptual capability, and the need to understand its neural bases provides a fundamental problem in the study of brain function. Both synchrony and temporal order judgments are commonly used to investigate synchrony perception between different sensory cues and multisensory perception in general. However, extensive behavioral evidence indicates that these tasks do not measure identical perceptual processes. Here we used functional magnetic resonance imaging to investigate how behavioral differences between the tasks are instantiated as neural differences. As these neural differences could manifest at either the sustained (task/state-related) and/or transient (event-related) levels of processing, a mixed block/event-related design was used to investigate the neural response of both time-scales. Clear differences in both sustained and transient BOLD responses were observed between the two tasks, consistent with behavioral differences indeed arising from overlapping but divergent neural mechanisms. Temporal order judgments, but not synchrony judgments, required transient activation in several left hemisphere regions, which may reflect increased task demands caused by an extra stage of processing. Our results highlight that multisensory integration mechanisms can be task dependent, which, in particular, has implications for the study of atypical temporal processing in clinical populations. Frontiers Media S.A. 2018-07-03 /pmc/articles/PMC6037859/ /pubmed/30018545 http://dx.doi.org/10.3389/fnhum.2018.00274 Text en Copyright © 2018 Love, Petrini, Pernet, Latinus and Pollick. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Neuroscience
Love, Scott A.
Petrini, Karin
Pernet, Cyril R.
Latinus, Marianne
Pollick, Frank E.
Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title_full Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title_fullStr Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title_full_unstemmed Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title_short Overlapping but Divergent Neural Correlates Underpinning Audiovisual Synchrony and Temporal Order Judgments
title_sort overlapping but divergent neural correlates underpinning audiovisual synchrony and temporal order judgments
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6037859/
https://www.ncbi.nlm.nih.gov/pubmed/30018545
http://dx.doi.org/10.3389/fnhum.2018.00274
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