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Paper Abstract and Keywords
Presentation 2021-10-07 16:10
Evaluation of stimulation conditions of tDCS considering electric field distribution in target and contralateral hemispheres of lower limb area
Hiroki Hamajima, Jose Gomez-Tames (NITech), Shintaro Uehara, Yohei Otaka (FHU), Satoshi Tanaka (HUSM), Akimasa Hirata (NITech) EMCJ2021-38 MW2021-50 EST2021-40
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, there has been a growing interest in focal brain neuromodulation in a non-invasive manner for medical treatment. One non-invasive method used as an effective adjunctive therapy in walking rehabilitation for stroke patients is transcranial direct current stimulation (tDCS). tDCS injects a weak electric current into the brain via electrodes attached to the scalp to modulate the cortical excitability. One potential mechanism of tDCS is providing balance in neuromodulation levels in both hemispheres to achieve coordinated motion of the lower limbs. However, estimation of the electric currents in vivo measurements has not been possible and optimization of stimulation parameters is difficult to achieve. Computational physics has been used to estimate the generated electric currents in the brain in which electric field strength and electric field component normal to the cortical surface are used as physical quantities of neuromodulation. In this study, eighteen individualized head models were used to calculate the electric fields generated from electrodes attached at various positions. Based on the electric field distributions in both hemispheres of the primary motor cortex and supplementary motor cortex related to lower limbs, we investigated effective electrode montages to maximize the electric fields at group-level considering walking rehabilitation as an ultimate goal.
Keyword (in Japanese) (See Japanese page) 
(in English) transcranial direct current stimulation / scalar potential finite difference (SPFD) method / leg motor area / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 188, EST2021-40, pp. 54-59, Oct. 2021.
Paper # EST2021-40 
Date of Issue 2021-09-30 (EMCJ, MW, 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 EMCJ2021-38 MW2021-50 EST2021-40

Conference Information
Committee EST MW EMCJ IEE-EMC  
Conference Date 2021-10-07 - 2021-10-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EST 
Conference Code 2021-10-EST-MW-EMCJ-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of stimulation conditions of tDCS considering electric field distribution in target and contralateral hemispheres of lower limb area 
Sub Title (in English)  
Keyword(1) transcranial direct current stimulation  
Keyword(2) scalar potential finite difference (SPFD) method  
Keyword(3) leg motor area  
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1st Author's Name Hiroki Hamajima  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Jose Gomez-Tames  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Shintaro Uehara  
3rd Author's Affiliation Fujita Health University (FHU)
4th Author's Name Yohei Otaka  
4th Author's Affiliation Fujita Health University (FHU)
5th Author's Name Satoshi Tanaka  
5th Author's Affiliation Hamamatsu University School of Medicine (HUSM)
6th Author's Name Akimasa Hirata  
6th Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2021-10-07 16:10:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EMCJ2021-38, MW2021-50, EST2021-40 
Volume (vol) vol.121 
Number (no) no.186(EMCJ), no.187(MW), no.188(EST) 
Page pp.54-59 
#Pages 6 
Date of Issue 2021-09-30 (EMCJ, MW, EST) 

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