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Left hemispheric dominance during auditory processing in a noisy environment
BACKGROUND: In daily life, we are exposed to different sound inputs simultaneously. During neural encoding in the auditory pathway, neural activities elicited by these different sounds interact with each other. In the present study, we investigated neural interactions elicited by masker and amplitud...
Autores principales: | , , , , |
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2007
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2194668/ https://www.ncbi.nlm.nih.gov/pubmed/18005401 http://dx.doi.org/10.1186/1741-7007-5-52 |
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author | Okamoto, Hidehiko Stracke, Henning Ross, Bernhard Kakigi, Ryusuke Pantev, Christo |
author_facet | Okamoto, Hidehiko Stracke, Henning Ross, Bernhard Kakigi, Ryusuke Pantev, Christo |
author_sort | Okamoto, Hidehiko |
collection | PubMed |
description | BACKGROUND: In daily life, we are exposed to different sound inputs simultaneously. During neural encoding in the auditory pathway, neural activities elicited by these different sounds interact with each other. In the present study, we investigated neural interactions elicited by masker and amplitude-modulated test stimulus in primary and non-primary human auditory cortex during ipsi-lateral and contra-lateral masking by means of magnetoencephalography (MEG). RESULTS: We observed significant decrements of auditory evoked responses and a significant inter-hemispheric difference for the N1m response during both ipsi- and contra-lateral masking. CONCLUSION: The decrements of auditory evoked neural activities during simultaneous masking can be explained by neural interactions evoked by masker and test stimulus in peripheral and central auditory systems. The inter-hemispheric differences of N1m decrements during ipsi- and contra-lateral masking reflect a basic hemispheric specialization contributing to the processing of complex auditory stimuli such as speech signals in noisy environments. |
format | Text |
id | pubmed-2194668 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-21946682008-01-12 Left hemispheric dominance during auditory processing in a noisy environment Okamoto, Hidehiko Stracke, Henning Ross, Bernhard Kakigi, Ryusuke Pantev, Christo BMC Biol Research Article BACKGROUND: In daily life, we are exposed to different sound inputs simultaneously. During neural encoding in the auditory pathway, neural activities elicited by these different sounds interact with each other. In the present study, we investigated neural interactions elicited by masker and amplitude-modulated test stimulus in primary and non-primary human auditory cortex during ipsi-lateral and contra-lateral masking by means of magnetoencephalography (MEG). RESULTS: We observed significant decrements of auditory evoked responses and a significant inter-hemispheric difference for the N1m response during both ipsi- and contra-lateral masking. CONCLUSION: The decrements of auditory evoked neural activities during simultaneous masking can be explained by neural interactions evoked by masker and test stimulus in peripheral and central auditory systems. The inter-hemispheric differences of N1m decrements during ipsi- and contra-lateral masking reflect a basic hemispheric specialization contributing to the processing of complex auditory stimuli such as speech signals in noisy environments. BioMed Central 2007-11-15 /pmc/articles/PMC2194668/ /pubmed/18005401 http://dx.doi.org/10.1186/1741-7007-5-52 Text en Copyright © 2007 Okamoto et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Okamoto, Hidehiko Stracke, Henning Ross, Bernhard Kakigi, Ryusuke Pantev, Christo Left hemispheric dominance during auditory processing in a noisy environment |
title | Left hemispheric dominance during auditory processing in a noisy environment |
title_full | Left hemispheric dominance during auditory processing in a noisy environment |
title_fullStr | Left hemispheric dominance during auditory processing in a noisy environment |
title_full_unstemmed | Left hemispheric dominance during auditory processing in a noisy environment |
title_short | Left hemispheric dominance during auditory processing in a noisy environment |
title_sort | left hemispheric dominance during auditory processing in a noisy environment |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2194668/ https://www.ncbi.nlm.nih.gov/pubmed/18005401 http://dx.doi.org/10.1186/1741-7007-5-52 |
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