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Paper Abstract and Keywords
Presentation 2026-01-22 13:00
Numerical Evaluation of Transcranial Electrical Stimulation Due to Variation in Electrode Position
Taiga Inoue, Sachiko Kodera, Akimasa Hirata (NITech) EST2025-86
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, non-invasive stimulation of brain tissue has attracted much attention in the treatment of brain dysfunctions. One of the methods is transcranial electrical stimulation (tES). In particular, temporal interference stimulation (TIS), a novel method based on transcranial alternating current stimulation (tACS), has the unique ability to generate localized electric field envelope in targeted brain regions. In tES and TIS, electrodes are attached to the scalp whose positions are typically based on the international 10 –10 system. However, the positions of the electrodes are likely to be deviated from the reference position in the clinical setting. In this study, we evaluated how a slight displacement of the electrode position affects the distributions of the electric field strength in tACS and the envelope amplitude in TIS. The results showed that, for superficial cortical targets, the electric field amplitude generated by TIS is more sensitive to electrode displacement than the electric field generated by tACS. In contrast, for deep brain targets, the electric field produced by tACS is more susceptible to positional shifts than the electric field envelope produced by TIS. These findings indicate that precise electrode placement is particularly important for TIS when stimulating superficial cortical regions, and for tACS when targeting deep brain regions.
Keyword (in Japanese) (See Japanese page) 
(in English) Temporal Interference Stimulation / transcranial Alternating Current Stimulation / Scalar Potential Finite Difference Method / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 328, EST2025-86, pp. 25-30, Jan. 2026.
Paper # EST2025-86 
Date of Issue 2026-01-15 (EST) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EST2025-86

Conference Information
Committee EST  
Conference Date 2026-01-22 - 2026-01-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Nobumoto Ohama Memorial Hal 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Simulation techniques, etc. 
Paper Information
Registration To EST 
Conference Code 2026-01-EST 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Numerical Evaluation of Transcranial Electrical Stimulation Due to Variation in Electrode Position 
Sub Title (in English)  
Keyword(1) Temporal Interference Stimulation  
Keyword(2) transcranial Alternating Current Stimulation  
Keyword(3) Scalar Potential Finite Difference Method  
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1st Author's Name Taiga Inoue  
1st Author's Affiliation Nagoya Institute of technology (NITech)
2nd Author's Name Sachiko Kodera  
2nd Author's Affiliation Nagoya Institute of technology (NITech)
3rd Author's Name Akimasa Hirata  
3rd Author's Affiliation Nagoya Institute of technology (NITech)
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Speaker Author-1 
Date Time 2026-01-22 13:00:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EST2025-86 
Volume (vol) vol.125 
Number (no) no.328 
Page pp.25-30 
#Pages 6 
Date of Issue 2026-01-15 (EST) 

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