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Reference: Teki, S, Barascud, N, Picard, S et al., (2016). Neural correlates of auditory figure-ground segregation based on temporal coherence. Cerebral Cortex, 26 (9), 3669-3680.Citable link to this page:

 

Neural correlates of auditory figure-ground segregation based on temporal coherence.

Abstract: To make sense of natural acoustic environments, listeners must parse complex mixtures of sounds that vary in frequency, space, and time. Emerging work suggests that, in addition to the well-studied spectral cues for segregation, sensitivity to temporal coherence—the coincidence of sound elements in and across time—is also critical for the perceptual organization of acoustic scenes. Here, we examine pre-attentive, stimulus-driven neural processes underlying auditoryfigure-ground segregation using stimuli that capture the challenges of listening in complex scenes where segregation cannot be achieved based on spectral cues alone. Signals (“stochasticfigure-ground”: SFG) comprised a sequence of brief broadband chords containing random pure tone components that vary from 1 chord to another. Occasional tone repetitions across chords are perceived as “figures” popping out of a stochastic“ground.” Magnetoencephalography (MEG) measurement in naïve, distracted, human subjects revealed robust evoked responses, commencing from about 150 ms afterfigure onset that reflect the emergence of the “figure” from the randomly varying “ground.” Neural sources underlying this bottom-up driven figure-ground segregation were localized to planum temporale, and the intraparietal sulcus, demonstrating that this area, outside the “classic” auditory system, is also involved in the early stages of auditory scene analysis.”

Publication status:PublishedPeer Review status:Peer reviewedVersion:Publisher's versionDate of acceptance:2016-05-12 Funder: Wellcome Trust   Notes:© The Author 2016. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

Bibliographic Details

Publisher: Oxford University Press

Publisher Website: http://www.oxfordjournals.org/

Journal: Cerebral Cortexsee more from them

Publication Website: http://cercor.oxfordjournals.org/

Volume: 26

Issue: 9

Extent: 3669-3680

Issue Date: 2016-06

pages:3669-3680Identifiers

Doi: https://doi.org/10.1093/cercor/bhw173

Issn: 1460-2199

Issn: 1047-3211

Uuid: uuid:dc630400-5390-4806-8606-a73a3927bfde

Urn: uri:dc630400-5390-4806-8606-a73a3927bfde

Pubs-id: pubs:629325 Item Description

Type: journal-article;

Language: eng

Version: Publisher's versionKeywords: auditory cortex auditory scene analysis intraparietal sulcus magnetoencephalography segregation temporal coherence Journal Article

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Author: Teki, S - Oxford, MSD, Physiology Anatomy and Genetics fundingWellcome Trust grantNumber106084-Z-14-Z - - - Barascud, N - - - Pic

Source: https://ora.ox.ac.uk/objects/uuid:dc630400-5390-4806-8606-a73a3927bfde



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