Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Okamoto, Hidehiko, Stracke, Henning, Ross, Bernhard, Kakigi, Ryusuke, Pantev, Christo
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2007
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
_version_ 1782147669525790720
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
work_keys_str_mv AT okamotohidehiko lefthemisphericdominanceduringauditoryprocessinginanoisyenvironment
AT strackehenning lefthemisphericdominanceduringauditoryprocessinginanoisyenvironment
AT rossbernhard lefthemisphericdominanceduringauditoryprocessinginanoisyenvironment
AT kakigiryusuke lefthemisphericdominanceduringauditoryprocessinginanoisyenvironment
AT pantevchristo lefthemisphericdominanceduringauditoryprocessinginanoisyenvironment