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Paper Abstract and Keywords
Presentation 2019-12-06 13:25
Numerical analysis of coil-induced electric field in micro magnetic stimulation and its evaluation on the basis of evoked neural responses
Shunsuke Sugai, Jun Nishikawa, Takashi Tateno (Hokkaido Univ.) MBE2019-51 NC2019-42
Abstract (in Japanese) (See Japanese page) 
(in English) Magnetic stimulation has widely attracted attention as a treatment for neurological diseases. In general, the size reduction of magnetic stimulation devices is desirable because the size is relatively large, compared with electrode stimulation devices. In transcranial magnetic stimulation, the exact brain regions and their triggering mechanisms of neural activity are largely unknown because of the large size of the devices. This study aims to develop a new implantable microcoil device, which stimulates the brain locally on the order of several tens of microscales, as well as clarifying the mechanisms of neural activity induction. First, to know the effects of the coil shape on the evoked neural responses, the induced electric field in semicircular coils with different diameters was numerically calculated using the finite element method. Next, from the obtained numerical results, we compared the spatial regions of the neural tissue above the minimum threshold that can induce neural activity in different coil shapes and examined the optimal coil shape for the effective stimulation to the neural tissue. Finally, we measured the brain areas where evoked responses through autofluorescent flavoprotein imaging and evaluated the validity.
Keyword (in Japanese) (See Japanese page) 
(in English) Autofluorescence imaging / Brain stimulation / Coil design / Finite element method / Micro-magnetic stimulation / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 328, NC2019-42, pp. 37-42, Dec. 2019.
Paper # NC2019-42 
Date of Issue 2019-11-29 (MBE, NC) 
ISSN Online edition: ISSN 2432-6380
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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)
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Conference Information
Committee NC MBE  
Conference Date 2019-12-06 - 2019-12-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Toyohashi Tech 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2019-12-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Numerical analysis of coil-induced electric field in micro magnetic stimulation and its evaluation on the basis of evoked neural responses 
Sub Title (in English)  
Keyword(1) Autofluorescence imaging  
Keyword(2) Brain stimulation  
Keyword(3) Coil design  
Keyword(4) Finite element method  
Keyword(5) Micro-magnetic stimulation  
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1st Author's Name Shunsuke Sugai  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Jun Nishikawa  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Takashi Tateno  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2019-12-06 13:25:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # MBE2019-51, NC2019-42 
Volume (vol) vol.119 
Number (no) no.327(MBE), no.328(NC) 
Page pp.37-42 
#Pages
Date of Issue 2019-11-29 (MBE, NC) 


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