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  Asymmetric sampling in human auditory cortex reveals spectral processing hierarchy

Giroud, J., Trébuchon, A., Schön, D., Marquis, P., Liegeois-Chauvel, C., Poeppel, D., et al. (2020). Asymmetric sampling in human auditory cortex reveals spectral processing hierarchy. PLoS Biology, 18(3): e3000207. doi:10.1371/journal.pbio.3000207.

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neu-20-poe-asymmetric.pdf (Verlagsversion), 3MB
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©2020 Giroudet al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproductionin any medium, provided the original authorand source are credited.

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 Urheber:
Giroud, Jérémy1, Autor
Trébuchon, Agnès1, 2, Autor
Schön, Daniele1, Autor
Marquis, Patrick1, Autor
Liegeois-Chauvel, Catherine1, 3, Autor
Poeppel, David4, 5, Autor           
Morillon, Benjamin1, Autor
Affiliations:
1Aix Marseille University, Inserm, INS, Inst Neurosci Syst, Marseille, France , ou_persistent22              
2APHM, Hôpital de la Timone, Service de Neurophysiologie Clinique, Marseille, France , ou_persistent22              
3Cleveland Clinic Neurological Institute, Epilepsy Center, Cleveland, Ohio, United States of America , ou_persistent22              
4Department of Neuroscience, Max Planck Institute for Empirical Aesthetics, Max Planck Society, ou_2421697              
5Department of Psychology and Center for Neural Science, New York University , New York, New York, United States of America , ou_persistent22              

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 Zusammenfassung: Speech perception is mediated by both left and right auditory cortices but with differential sensitivity to specific acoustic information contained in the speech signal. A detailed description of this functional asymmetry is missing, and the underlying models are widely debated. We analyzed cortical responses from 96 epilepsy patients with electrode implantation in left or right primary, secondary, and/or association auditory cortex (AAC). We presented short acoustic transients to noninvasively estimate the dynamical properties of multiple functional regions along the auditory cortical hierarchy. We show remarkably similar bimodal spectral response profiles in left and right primary and secondary regions, with evoked activity composed of dynamics in the theta (around 4–8 Hz) and beta–gamma (around 15–40 Hz) ranges. Beyond these first cortical levels of auditory processing, a hemispheric asymmetry emerged, with delta and beta band (3/15 Hz) responsivity prevailing in the right hemisphere and theta and gamma band (6/40 Hz) activity prevailing in the left. This asymmetry is also present during syllables presentation, but the evoked responses in AAC are more heterogeneous, with the co-occurrence of alpha (around 10 Hz) and gamma (>25 Hz) activity bilaterally. These intracranial data provide a more fine-grained and nuanced characterization of cortical auditory processing in the 2 hemispheres, shedding light on the neural dynamics that potentially shape auditory and speech processing at different levels of the cortical hierarchy.

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Sprache(n): eng - English
 Datum: 2019-03-172020-02-132020-03-02
 Publikationsstatus: Online veröffentlicht
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1371/journal.pbio.3000207
 Art des Abschluß: -

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Titel: PLoS Biology
  Andere : PLoS Biol.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: San Francisco, California, US : Public Library of Science
Seiten: - Band / Heft: 18 (3) Artikelnummer: e3000207 Start- / Endseite: - Identifikator: ISSN: 1544-9173
CoNE: https://pure.mpg.de/cone/journals/resource/111056649444170