Dynamics underlying auditory‐object‐boundary detection in primary auditory cortex

Pradeep Dheerendra; Nicolas Barascud; Sukhbinder Kumar; Tobias Overath; Timothy D. Griffiths

doi:10.1111/ejn.15471

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Dynamics underlying auditory‐object‐boundary detection in primary auditory cortex

Journal article

Open access

Peer reviewed

Dynamics underlying auditory‐object‐boundary detection in primary auditory cortex

Pradeep Dheerendra, Nicolas Barascud, Sukhbinder Kumar, Tobias Overath and Timothy D. Griffiths

The European journal of neuroscience, Vol.54(9), pp.7274-7288

11/2021

DOI: 10.1111/ejn.15471

PMID: 34549472

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Abstract

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. Keywords: MEG; auditory object; change detection; perceptual decision making; statistical learning.

Details

Title: Subtitle: Dynamics underlying auditory‐object‐boundary detection in primary auditory cortex
Creators: Pradeep Dheerendra - Newcastle University
Nicolas Barascud - UCL Ear Institute
Sukhbinder Kumar - University of Newcastle Australia
Tobias Overath - Duke University
Timothy D. Griffiths - Wellcome Centre for Human Neuroimaging
Resource Type: Journal article
Publication Details: The European journal of neuroscience, Vol.54(9), pp.7274-7288
DOI: 10.1111/ejn.15471
PMID: 34549472
NLM abbreviation: Eur J Neurosci
ISSN: 0953-816X
eISSN: 1460-9568
Grant note: DOI: 10.13039/100010269, name: Wellcome Trust, award: WT102561/Z/13/Z, WT106964MA
Language: English
Date published: 11/2021
Academic Unit: Psychological and Brain Sciences; Neurosurgery
Record Identifier: 9984304031702771

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