Implicit representation of the auditory space: contribution of the left and right hemispheres.

Details

Serval ID
serval:BIB_A838B7DD23B3
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Implicit representation of the auditory space: contribution of the left and right hemispheres.
Journal
Brain structure & function
Author(s)
Tissieres I., Crottaz-Herbette S., Clarke S.
ISSN
1863-2661 (Electronic)
ISSN-L
1863-2653
Publication state
Published
Issued date
05/2019
Peer-reviewed
Oui
Volume
224
Number
4
Pages
1569-1582
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Spatial cues contribute to the ability to segregate sound sources and thus facilitate their detection and recognition. This implicit use of spatial cues can be preserved in cases of cortical spatial deafness, suggesting that partially distinct neural networks underlie the explicit sound localization and the implicit use of spatial cues. We addressed this issue by assessing 40 patients, 20 patients with left and 20 patients with right hemispheric damage, for their ability to use auditory spatial cues implicitly in a paradigm of spatial release from masking (SRM) and explicitly in sound localization. The anatomical correlates of their performance were determined with voxel-based lesion-symptom mapping (VLSM). During the SRM task, the target was always presented at the centre, whereas the masker was presented at the centre or at one of the two lateral positions on the right or left side. The SRM effect was absent in some but not all patients; the inability to perceive the target when the masker was at one of the lateral positions correlated with lesions of the left temporo-parieto-frontal cortex or of the right inferior parietal lobule and the underlying white matter. As previously reported, sound localization depended critically on the right parietal and opercular cortex. Thus, explicit and implicit use of spatial cues depends on at least partially distinct neural networks. Our results suggest that the implicit use may rely on the left-dominant position-linked representation of sound objects, which has been demonstrated in previous EEG and fMRI studies.
Keywords
Attention, Auditory spatial processing, Lesion studies, Sound object segregation, Unilateral neglect
Pubmed
Web of science
Create date
08/04/2019 17:55
Last modification date
20/08/2019 16:12
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