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. 2019 Jan 25;16:14. doi: 10.1186/s12984-019-0489-9

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© The Author(s). 2019

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.

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Fig. 4 — Potential response analysis after personalized tDCS combined with EEG or fNIRS. (A) EEG power spectrum, hemodynamics, functional network, and stimulus responses can be monitored within or near stimulation electrode areas in personalized electrode tDCS. (B) Those parameters can be monitored in the whole brain areas in distributed array tDCS combined with EEG of fNIRS. Red color represents anodes and blue color represents cathodes. tDCS: transcranial direct current stimulation; EEG: electroencephalography; fNIRS: functional near infrared spectroscopoy