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Lookup NU author(s): Dr Pradeep Dheerendra, Dr Sukhbinder Kumar, Tobias Overath, Professor Tim GriffithsORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2021 The Authors. European Journal of Neuroscience published by Federation of European Neuroscience Societies and John Wiley & Sons Ltd.Auditory object analysis requires the fundamental perceptual process of detecting boundaries between auditory objects. However, the dynamics underlying the identification of discontinuities at object boundaries are not well understood. Here, we employed a synthetic stimulus composed of frequency-modulated ramps known as ‘acoustic textures’, where boundaries were created by changing the underlying spectrotemporal statistics. We collected magnetoencephalographic (MEG) data from human volunteers and observed a slow (<1 Hz) post-boundary drift in the neuromagnetic signal. The response evoking this drift signal was source localised close to Heschl's gyrus (HG) bilaterally, which is in agreement with a previous functional magnetic resonance imaging (fMRI) study that found HG to be involved in the detection of similar auditory object boundaries. Time–frequency analysis demonstrated suppression in alpha and beta bands that occurred after the drift signal.
Author(s): Dheerendra P, Barascud N, Kumar S, Overath T, Griffiths TD
Publication type: Article
Publication status: Published
Journal: European Journal of Neuroscience
Year: 2021
Volume: 54
Issue: 9
Pages: 7274-7288
Print publication date: 09/11/2021
Online publication date: 21/09/2021
Acceptance date: 16/09/2021
Date deposited: 08/11/2021
ISSN (print): 0953-816X
ISSN (electronic): 1460-9568
Publisher: John Wiley and Sons Inc
URL: https://doi.org/10.1111/ejn.15471
DOI: 10.1111/ejn.15471
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