University of Sussex
Browse
journal.pbio.3001142.pdf (6.59 MB)

Sustained neural rhythms reveal endogenous oscillations supporting speech perception

Download (6.59 MB)
Version 2 2023-06-12, 09:44
Version 1 2023-06-09, 23:09
journal contribution
posted on 2023-06-12, 09:44 authored by Sander van Bree, Ediz SohogluEdiz Sohoglu, Matthew H Davis, Benedikt Zoefel
Rhythmic sensory or electrical stimulation will produce rhythmic brain responses. These rhythmic responses are often interpreted as endogenous neural oscillations aligned (or “entrained”) to the stimulus rhythm. However, stimulus-aligned brain responses can also be explained as a sequence of evoked responses, which only appear regular due to the rhythmicity of the stimulus, without necessarily involving underlying neural oscillations. To distinguish evoked responses from true oscillatory activity, we tested whether rhythmic stimulation produces oscillatory responses which continue after the end of the stimulus. Such sustained effects provide evidence for true involvement of neural oscillations. In Experiment 1, we found that rhythmic intelligible, but not unintelligible speech produces oscillatory responses in magnetoencephalography (MEG) which outlast the stimulus at parietal sensors. In Experiment 2, we found that transcranial alternating current stimulation (tACS) leads to rhythmic fluctuations in speech perception outcomes after the end of electrical stimulation. We further report that the phase relation between electroencephalography (EEG) responses and rhythmic intelligible speech can predict the tACS phase that leads to most accurate speech perception. Together, we provide fundamental results for several lines of research—including neural entrainment and tACS—and reveal endogenous neural oscillations as a key underlying principle for speech perception.

History

Publication status

  • Published

File Version

  • Published version

Journal

PLoS Biology

ISSN

1544-9173

Publisher

Public Library of Science (PLoS)

Issue

2

Volume

19

Page range

1-33

Article number

a3001142

Department affiliated with

  • Psychology Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2021-02-25

First Open Access (FOA) Date

2021-02-25

First Compliant Deposit (FCD) Date

2021-02-24

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC