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    Slow phase-locked modulations support selective attention to sound

    Kachlicka, Magdalena and Laffere, Aeron and Dick, Fred and Tierney, Adam (2022) Slow phase-locked modulations support selective attention to sound. NeuroImage 252 (119024), ISSN 1053-8119.

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    Abstract

    To make sense of complex soundscapes, listeners must select and attend to task-relevant streams while ignoring uninformative sounds. One possible neural mechanism underlying this process is alignment of endogenous oscillations with the temporal structure of the target sound stream. Such a mechanism has been suggested to mediate attentional modulation of neural phase-locking to the rhythms of attended sounds. However, such modulations are compatible with an alternate framework, where attention acts as a filter that enhances exogenously-driven neural auditory responses. Here we attempted to test several predictions arising from the oscillatory account by playing two tone streams varying across conditions in tone duration and presentation rate; participants attended to one stream or listened passively. Attentional modulation of the evoked waveform was roughly sinusoidal and scaled with rate, while the passive response did not. However, there was only limited evidence for continuation of modulations through the silence between sequences. These results suggest that attentionally-driven changes in phase alignment reflect synchronization of slow endogenous activity with the temporal structure of attended stimuli.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Attention, Auditory, Temporal, EEG
    School: School of Science > Psychological Sciences
    Depositing User: Adam Tierney
    Date Deposited: 13 Apr 2022 12:35
    Last Modified: 13 Apr 2022 21:50
    URI: https://eprints.bbk.ac.uk/id/eprint/47751

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