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Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS)
BACKGROUND: Speech-related disorders may refer to impairment of temporal analysis in the human auditory system. By the advance of non-invasive brain stimulation new forms of therapy arise. In the present study, we examined the neuromodulatory effect of auditory tDCS on the perception of temporal mod...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4736484/ https://www.ncbi.nlm.nih.gov/pubmed/26831504 http://dx.doi.org/10.1186/s12868-016-0241-3 |
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author | Heimrath, Kai Fischer, Anna Heinze, Hans-Jochen Zaehle, Tino |
author_facet | Heimrath, Kai Fischer, Anna Heinze, Hans-Jochen Zaehle, Tino |
author_sort | Heimrath, Kai |
collection | PubMed |
description | BACKGROUND: Speech-related disorders may refer to impairment of temporal analysis in the human auditory system. By the advance of non-invasive brain stimulation new forms of therapy arise. In the present study, we examined the neuromodulatory effect of auditory tDCS on the perception of temporal modulated speech syllables. In three experimental sessions we assessed phonetic categorization of consonant–vowels (CV)-syllables (/da/,/ta/) with varying voice onset times (VOT) during sham, anodal, and cathodal tDCS delivered bilateral to the auditory cortex (AC). Subsequently, we recorded auditory evoked potentials (AEP) in response to voiced (/ba/,/da/,/ga/) and voiceless (/pa/,/ta/,/ka/) CV-syllables. RESULTS: In result, we demonstrate that bilateral tDCS of the AC can modulate CV-syllable perception. Behaviorally, cathodal tDCS improved phonetic categorization abilities in a VOT continuum accompanied by an elevation of the P50 amplitude of the AEP to CV-syllables during the anodal tDCS after effect. CONCLUSIONS: The present study demonstrates the ability of bilateral tDCS over the AC to ameliorate speech perception. The results may have clinical implications by fostering potential approaches for a treatment of speech-related pathologies with a deficit of temporal processing. |
format | Online Article Text |
id | pubmed-4736484 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-47364842016-02-03 Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) Heimrath, Kai Fischer, Anna Heinze, Hans-Jochen Zaehle, Tino BMC Neurosci Research Article BACKGROUND: Speech-related disorders may refer to impairment of temporal analysis in the human auditory system. By the advance of non-invasive brain stimulation new forms of therapy arise. In the present study, we examined the neuromodulatory effect of auditory tDCS on the perception of temporal modulated speech syllables. In three experimental sessions we assessed phonetic categorization of consonant–vowels (CV)-syllables (/da/,/ta/) with varying voice onset times (VOT) during sham, anodal, and cathodal tDCS delivered bilateral to the auditory cortex (AC). Subsequently, we recorded auditory evoked potentials (AEP) in response to voiced (/ba/,/da/,/ga/) and voiceless (/pa/,/ta/,/ka/) CV-syllables. RESULTS: In result, we demonstrate that bilateral tDCS of the AC can modulate CV-syllable perception. Behaviorally, cathodal tDCS improved phonetic categorization abilities in a VOT continuum accompanied by an elevation of the P50 amplitude of the AEP to CV-syllables during the anodal tDCS after effect. CONCLUSIONS: The present study demonstrates the ability of bilateral tDCS over the AC to ameliorate speech perception. The results may have clinical implications by fostering potential approaches for a treatment of speech-related pathologies with a deficit of temporal processing. BioMed Central 2016-02-01 /pmc/articles/PMC4736484/ /pubmed/26831504 http://dx.doi.org/10.1186/s12868-016-0241-3 Text en © Heimrath et al. 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Heimrath, Kai Fischer, Anna Heinze, Hans-Jochen Zaehle, Tino Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title | Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title_full | Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title_fullStr | Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title_full_unstemmed | Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title_short | Changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tDCS) |
title_sort | changed categorical perception of consonant–vowel syllables induced by transcranial direct current stimulation (tdcs) |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4736484/ https://www.ncbi.nlm.nih.gov/pubmed/26831504 http://dx.doi.org/10.1186/s12868-016-0241-3 |
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