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Journal Article

Putting focus on transcranial direct current stimulation in language production studies

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Citation

Klaus, J., & Schutter, D. J. L. G. (2018). Putting focus on transcranial direct current stimulation in language production studies. PLoS One, 13(8): e0202730. doi:10.1371/journal.pone.0202730.


Cite as: https://hdl.handle.net/21.11116/0000-0002-C2F2-1
Abstract
Previous language production studies targeting the inferior frontal and superior temporal gyrus using anodal tDCS have provided mixed results. Part of this heterogeneity may be explained by limited target region focality of conventionally used electrode montages. We examined the focality of conventionally and alternative electrode montages. Electrical field distributions of anodal tDCS targeting IFG and pSTG were simulated in conventional setups (anodal electrode over left IFG/pSTG, reference electrode over right supraorbital region) and an alternative electrode montage in four different brains. Conventional montages showed maximum field strengths outside of the target regions. Results from alternative electrode montages showed that focality of tDCS could be improved by adjustments in electrode placement. Heterogeneity of findings of language production studies deploying conventional montages may in part be explained by diffuse electrical field distributions. Alternative montages may improve focality and provide more unequivocal results.