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. 2024 Feb 3;14:2850. doi: 10.1038/s41598-024-52874-y

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© The Author(s) 2024

Open Access 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 Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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The electric fields of conventional and optimized tDCSs. (A) Electric field distributions at the target areas (the hand knobs) of conventional tDCS (left) and optimized tDCS (right) in 21 stroke patients. The centers of the intersecting lines correspond to the target areas. The magnitude of the electric field increases linearly from blue to red. Notation: Con, Conventional tDCS simulation; Opti, Optimized tDCS simulation; R—Right; A—Anterior; S—Superior. (B) The electric field intensities in the target regions of conventional and optimized tDCS simulations. Circles represent individual patient data.