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Bottom-up driven involuntary attention modulates auditory signal in noise processing

BACKGROUND: Auditory evoked responses can be modulated by both the sequencing and the signal-to-noise ratio of auditory stimuli. Constant sequencing as well as intense masking sounds basically lead to N1m response amplitude reduction. However, the interaction between these two factors has not been i...

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Autores principales: Lagemann, Lothar, Okamoto, Hidehiko, Teismann, Henning, Pantev, Christo
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3022880/
https://www.ncbi.nlm.nih.gov/pubmed/21192798
http://dx.doi.org/10.1186/1471-2202-11-156
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author Lagemann, Lothar
Okamoto, Hidehiko
Teismann, Henning
Pantev, Christo
author_facet Lagemann, Lothar
Okamoto, Hidehiko
Teismann, Henning
Pantev, Christo
author_sort Lagemann, Lothar
collection PubMed
description BACKGROUND: Auditory evoked responses can be modulated by both the sequencing and the signal-to-noise ratio of auditory stimuli. Constant sequencing as well as intense masking sounds basically lead to N1m response amplitude reduction. However, the interaction between these two factors has not been investigated so far. Here, we presented subjects tone stimuli of different frequencies, which were either concatenated in blocks of constant frequency or in blocks of randomly changing frequencies. The tones were presented either in silence or together with broad-band noises of varying levels. RESULTS: In silence, tones presented with random sequencing elicited a larger N1m response than tones presented with constant sequencing. With increasing noise level, this difference decreased and even vanished in the condition where noise intensity exceeded the tone intensity by 10 dB. Furthermore, under noisy conditions, the N1m latency was shorter in the constant sequencing condition compared to the random sequencing condition. CONCLUSIONS: Besides the well-known neural habituation mechanisms, bottom-up driven attention plays an important role during auditory processing in noisy environments. This bottom-up driven attention would allow us to track a certain auditory signal in noisy situations without voluntarily paying attention to the auditory modality.
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spelling pubmed-30228802011-01-19 Bottom-up driven involuntary attention modulates auditory signal in noise processing Lagemann, Lothar Okamoto, Hidehiko Teismann, Henning Pantev, Christo BMC Neurosci Research Article BACKGROUND: Auditory evoked responses can be modulated by both the sequencing and the signal-to-noise ratio of auditory stimuli. Constant sequencing as well as intense masking sounds basically lead to N1m response amplitude reduction. However, the interaction between these two factors has not been investigated so far. Here, we presented subjects tone stimuli of different frequencies, which were either concatenated in blocks of constant frequency or in blocks of randomly changing frequencies. The tones were presented either in silence or together with broad-band noises of varying levels. RESULTS: In silence, tones presented with random sequencing elicited a larger N1m response than tones presented with constant sequencing. With increasing noise level, this difference decreased and even vanished in the condition where noise intensity exceeded the tone intensity by 10 dB. Furthermore, under noisy conditions, the N1m latency was shorter in the constant sequencing condition compared to the random sequencing condition. CONCLUSIONS: Besides the well-known neural habituation mechanisms, bottom-up driven attention plays an important role during auditory processing in noisy environments. This bottom-up driven attention would allow us to track a certain auditory signal in noisy situations without voluntarily paying attention to the auditory modality. BioMed Central 2010-12-30 /pmc/articles/PMC3022880/ /pubmed/21192798 http://dx.doi.org/10.1186/1471-2202-11-156 Text en Copyright ©2010 Lagemann et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (<url>http://creativecommons.org/licenses/by/2.0</url>), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Lagemann, Lothar
Okamoto, Hidehiko
Teismann, Henning
Pantev, Christo
Bottom-up driven involuntary attention modulates auditory signal in noise processing
title Bottom-up driven involuntary attention modulates auditory signal in noise processing
title_full Bottom-up driven involuntary attention modulates auditory signal in noise processing
title_fullStr Bottom-up driven involuntary attention modulates auditory signal in noise processing
title_full_unstemmed Bottom-up driven involuntary attention modulates auditory signal in noise processing
title_short Bottom-up driven involuntary attention modulates auditory signal in noise processing
title_sort bottom-up driven involuntary attention modulates auditory signal in noise processing
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3022880/
https://www.ncbi.nlm.nih.gov/pubmed/21192798
http://dx.doi.org/10.1186/1471-2202-11-156
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