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  The lateralization of speech-brain coupling is differentially modulated by intrinsic auditory and top-down mechanisms

Assaneo, M. F., Rimmele, J. M., Orpella, J., Ripollés, P., de Diego-Balaguer, R., & Poeppel, D. (2019). The lateralization of speech-brain coupling is differentially modulated by intrinsic auditory and top-down mechanisms. Frontiers in Integrative Neuroscience, 13:28. doi:10.3389/fnint.2019.00028.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-803F-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8040-2
Genre: Journal Article

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fnint-13-00028.pdf (Publisher version), 2MB
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© 2019 Assaneo, Rimmele, Orpella, Ripollés, de Diego-Balaguer and Poeppel.

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 Creators:
Assaneo, M. F.1, Author
Rimmele, Johanna Maria2, Author              
Orpella, J.1, Author
Ripollés, P.1, Author
de Diego-Balaguer, R.3, Author
Poeppel, David1, 2, Author              
Affiliations:
1Department of Psychology, New York University , New York, NY, United States, ou_persistent22              
2Department of Neuroscience, Max Planck Institute for Empirical Aesthetics, Max Planck Society, ou_2421697              
3Departament de Cognició, Desenvolupament i Psicologia de l’Educació, University of Barcelona , Barcelona, Spain, ou_persistent22              

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Free keywords: asymmetrical sampling, brain to stimulus synchronization, MEG (magnetoencephalography), speech perception, speech envelope tracking
 Abstract: The lateralization of neuronal processing underpinning hearing, speech, language, and music is widely studied, vigorously debated, and still not understood in a satisfactory manner. One set of hypotheses focuses on the temporal structure of perceptual experience and links auditory cortex asymmetries to underlying differences in neural populations with differential temporal sensitivity (e.g., ideas advanced by Zatorre et al. (2002) and Poeppel (2003). The Asymmetric Sampling in Time theory (AST) (Poeppel, 2003), builds on cytoarchitectonic differences between auditory cortices and predicts that modulation frequencies within the range of, roughly, the syllable rate, are more accurately tracked by the right hemisphere. To date, this conjecture is reasonably well supported, since – while there is some heterogeneity in the reported findings – the predicted asymmetrical entrainment has been observed in various experimental protocols. Here, we show that under specific processing demands, the rightward dominance disappears. We propose an enriched and modified version of the asymmetric sampling hypothesis in the context of speech. Recent work (Rimmele et al., 2018b) proposes two different mechanisms to underlie the auditory tracking of the speech envelope: one derived from the intrinsic oscillatory properties of auditory regions; the other induced by top-down signals coming from other non-auditory regions of the brain. We propose that under non-speech listening conditions, the intrinsic auditory mechanism dominates and thus, in line with AST, entrainment is rightward lateralized, as is widely observed. However, (i) depending on individual brain structural/functional differences, and/or (ii) in the context of specific speech listening conditions, the relative weight of the top-down mechanism can increase. In this scenario, the typically observed auditory sampling asymmetry (and its rightward dominance) diminishes or vanishes.

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Language(s): eng - English
 Dates: 2019-03-302019-07-022019-07-17
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.3389/fnint.2019.00028
 Degree: -

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Title: Frontiers in Integrative Neuroscience
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Research Foundation
Pages: - Volume / Issue: - Sequence Number: 13:28 Start / End Page: - Identifier: ISSN: 1662-5145
CoNE: https://pure.mpg.de/cone/journals/resource/1662-5145