An oscillator model better predicts cortical entrainment to music

  • A body of research demonstrates convincingly a role for synchronization of auditory cortex to rhythmic structure in sounds including speech and music. Some studies hypothesize that an oscillator in auditory cortex could underlie important temporal processes such as segmentation and prediction. An important critique of these findings raises the plausible concern that what is measured is perhaps not an oscillator but is instead a sequence of evoked responses. The two distinct mechanisms could look very similar in the case of rhythmic input, but an oscillator might better provide the computational roles mentioned above (i.e., segmentation and prediction). We advance an approach to adjudicate between the two models: analyzing the phase lag between stimulus and neural signal across different stimulation rates. We ran numerical simulations of evoked and oscillatory computational models, showing that in the evoked case,phase lag is heavily rate-dependent, while the oscillatory model displays marked phase concentration across stimulation rates. Next, we compared these model predictions with magnetoencephalography data recorded while participants listened to music of varying note rates. Our results show that the phase concentration of the experimental data is more in line with the oscillatory model than with the evoked model. This finding supports an auditory cortical signal that (i) contains components of both bottom-up evoked responses and internal oscillatory synchronization whose strengths are weighted by their appropriateness for particular stimulus types and (ii) cannot be explained by evoked responses alone.

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Author:Keith B. Doelling, M. Florencia Assaneo, Dana Bevilacqua, Bijan Pesaran, David Poeppel
URN:urn:nbn:de:hebis:30:3-501237
DOI:https://doi.org/10.1073/pnas.1816414116
ISSN:0027-8424
ISSN:1091-6490
Pubmed Id:https://pubmed.ncbi.nlm.nih.gov/31019082
Parent Title (English):Proceedings of the National Academy of Sciences of the United States of America
Publisher:National Acad. of Sciences
Place of publication:Washington, DC
Contributor(s):Peter Hagoort
Document Type:Article
Language:English
Year of Completion:2019
Date of first Publication:2019/04/24
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/04/29
Tag:MEG; computational models; evoked response; music; oscillator
Volume:116
Issue:Art. 201816414
Page Number:9
First Page:1
Last Page:9
Note:
Copyright © 2019 the Author(s). Published by PNAS.
This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND).
HeBIS-PPN:451037014
Institutes:Medizin / Medizin
Angeschlossene und kooperierende Institutionen / MPI für empirische Ästhetik
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung-Nicht kommerziell - Keine Bearbeitung 4.0