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  Semantic discrimination impacts tDCS modulation of verb processing

Niccolai, V., Klepp, A., Indefrey, P., Schnitzler, A., & Biermann-Ruben, K. (2017). Semantic discrimination impacts tDCS modulation of verb processing. Scientific Reports, 7: 17162. doi:10.1038/s41598-017-17326-w.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-F4ED-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-AF11-7
Genre: Journal Article

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s41598-017-17326-w.pdf (Publisher version), 2MB
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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Cre- ative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not per- mitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ .
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 Creators:
Niccolai, Valentina, Author
Klepp, Anne, Author
Indefrey, Peter1, 2, 3, Author              
Schnitzler, Alfons, Author
Biermann-Ruben, Katja, Author
Affiliations:
1Heinrich Heine University Düsseldorf, escidoc:persistent22              
2Donders Institute for Brain, Cognition and Behaviour, External Organizations, escidoc:55236              
3Neural Dynamics of Language Production, MPI for Psycholinguistics, Max Planck Society, Wundtlaan 1, 6525 XD Nijmegen, NL, escidoc:2528709              

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 Abstract: Motor cortex activation observed during body-related verb processing hints at simulation accompanying linguistic understanding. By exploiting the up- and down-regulation that anodal and cathodal transcranial direct current stimulation (tDCS) exert on motor cortical excitability, we aimed at further characterizing the functional contribution of the motor system to linguistic processing. In a double-blind sham-controlled within-subjects design, online stimulation was applied to the left hemispheric hand-related motor cortex of 20 healthy subjects. A dual, double-dissociation task required participants to semantically discriminate concrete (hand/foot) from abstract verb primes as well as to respond with the hand or with the foot to verb-unrelated geometric targets. Analyses were conducted with linear mixed models. Semantic priming was confirmed by faster and more accurate reactions when the response effector was congruent with the verb’s body part. Cathodal stimulation induced faster responses for hand verb primes thus indicating a somatotopical distribution of cortical activation as induced by body-related verbs. Importantly, this effect depended on performance in semantic discrimination. The current results point to verb processing being selectively modifiable by neuromodulation and at the same time to a dependence of tDCS effects on enhanced simulation. We discuss putative mechanisms operating in this reciprocal dependence of neuromodulation and motor resonance.

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Language(s): eng - English
 Dates: 2017-12-07
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1038/s41598-017-17326-w
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Title: Scientific Reports
  Abbreviation : Sci. Rep.
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 7 Sequence Number: 17162 Start / End Page: - Identifier: ISSN: 2045-2322
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/2045-2322