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| Presentation | 2018-03-19 15:40 Activation contour estimation and its visual stimulus size dependence using MEG Kouichi Watanabe (Univ. of Tokyo/NIT, Kisarazu College), Kenta Kabashima (Univ. of Tokyo), Kaoru Amano (NICT), Takaaki Nara (Univ. of Tokyo/JST PRESTO)  MI2017-82 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this study, we estimate the current source region on the surface of the cortex from the MEG signal. Based on assumptions that the brain is modeled by concentric sphere, the current density of a source is constant within the region, and the source is distributed on the surface of the cortex, we derived a model that can express a magnetic field by a boundary integral follows from the Sarvas’ equation and the Stokes’ law. In order to obtain a source region constrained to the cortex, discrete points of the cortex are made to correspond to the spherical surface, and region points are constrained to the spherical surface, and then region points on the cortex is obtained by the interpolation function. In this paper, we focused on MEG response from the visual cortex of the occipital lobe, and we examine how the source region of the cortex changed when the magnitude of the visual stimulus was changed. As a result, it was able to show that a source region on the cortex was spread correspond to the visual stimulus size. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | MEG / Activation contour estimation / Visual stimulus size / Contour integral / RBF interpolation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 518, MI2017-82, pp. 57-62, March 2018. | |
| Paper # | MI2017-82 | |
| Date of Issue | 2018-03-12 (MI) | |
| ISSN | Print edition: ISSN 0913-5685 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 | MI2017-82 |
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| Conference Information | |
| Committee | SIP EA SP MI |
| Conference Date | 2018-03-19 - 2018-03-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing, and Related Topics [SIP, EA, SP]/ Medical Image Engineering, Analysis, Recognition, etc. [MI] |
| Paper Information | |
| Registration To | MI |
| Conference Code | 2018-03-SIP-EA-SP-MI |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Activation contour estimation and its visual stimulus size dependence using MEG |
| Sub Title (in English) | |
| Keyword(1) | MEG |
| Keyword(2) | Activation contour estimation |
| Keyword(3) | Visual stimulus size |
| Keyword(4) | Contour integral |
| Keyword(5) | RBF interpolation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Kouichi Watanabe |
| 1st Author's Affiliation | The University of Tokyo/National Institute of Technology, Kisarazu College (Univ. of Tokyo/NIT, Kisarazu College) |
| 2nd Author's Name | Kenta Kabashima |
| 2nd Author's Affiliation | The University of Tokyo (Univ. of Tokyo) |
| 3rd Author's Name | Kaoru Amano |
| 3rd Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 4th Author's Name | Takaaki Nara |
| 4th Author's Affiliation | The University of Tokyo/JST PRESTO (Univ. of Tokyo/JST PRESTO) |
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| Speaker | Author-1 |
| Date Time | 2018-03-19 15:40:00 |
| Presentation Time | 15 minutes |
| Registration for | MI |
| Paper # | MI2017-82 |
| Volume (vol) | vol.117 |
| Number (no) | no.518 |
| Page | pp.57-62 |
| #Pages | 6 |
| Date of Issue | 2018-03-12 (MI) |
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