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| Presentation | 2015-03-16 14:45 Mechanisms of alpha-band rhythm modulation during sequential short-term memory encode. Ryota Chitose, Moe Yamaji (Hokkaido Univ.), Shinya Kuriki (Tokyo Denki Univ.), Koichi Yokosawa (Hokkaido Univ.)  MBE2014-148 NC2014-99 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | When memory items are presented sequentially, the beginning and the ending items are memorized well (primacy/recency effect). We recorded magnetoencephalogram during performing the following memory task. In the task, seven arrow images were presented sequentially. Afterwards, a recall number (e.g., “3”) was presented. Each participant memorized the arrow directions in order and recalling the direction that was presented in the order indicated by the recall number (i.e., the direction of 3rd arrow), and answered it by pressing a button. We found that the amplitude of alpha-band rhythm were larger during presenting midterm items (3rd, 4th, 5th) than during presenting beginning (1st, 2nd) or ending (6th, 7th) items. In order to clarify relationship between the memory and alpha-band rhythm, the experiment in which item numbers were randomized between 3 and 9 was also performed. When the items were less than 7, the alpha-band rhythm was not suppressed sufficiently at ending items, however, the ending items were still memorized well. This result suggests that the alpha-band suppression is not directly related to memory itself. On the other hand, the region of alpha-band increase around midterm items was estimated to be located in visual cortex. This result suggests that increasing alpha-band rhythm during presenting midterm items is caused by functional inhibition of visual inputs which are irrelevant to memory. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | memory / magnetoencephalography (MEG) / alpha-band rhythm / primacy effect / recency effect / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 515, NC2014-99, pp. 177-182, March 2015. | |
| Paper # | NC2014-99 | |
| Date of Issue | 2015-03-09 (MBE, NC) | |
| 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 | MBE2014-148 NC2014-99 |
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| Conference Information | |
| Committee | NC MBE |
| Conference Date | 2015-03-16 - 2015-03-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tamagawa University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | ME, etc |
| Paper Information | |
| Registration To | NC |
| Conference Code | 2015-03-NC-MBE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Mechanisms of alpha-band rhythm modulation during sequential short-term memory encode. |
| Sub Title (in English) | |
| Keyword(1) | memory |
| Keyword(2) | magnetoencephalography (MEG) |
| Keyword(3) | alpha-band rhythm |
| Keyword(4) | primacy effect |
| Keyword(5) | recency effect |
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| Keyword(8) | |
| 1st Author's Name | Ryota Chitose |
| 1st Author's Affiliation | Hokkaido Univercity (Hokkaido Univ.) |
| 2nd Author's Name | Moe Yamaji |
| 2nd Author's Affiliation | Hokkaido Univercity (Hokkaido Univ.) |
| 3rd Author's Name | Shinya Kuriki |
| 3rd Author's Affiliation | Tokyo Denki University (Tokyo Denki Univ.) |
| 4th Author's Name | Koichi Yokosawa |
| 4th Author's Affiliation | Hokkaido Univercity (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2015-03-16 14:45:00 |
| Presentation Time | 25 minutes |
| Registration for | NC |
| Paper # | MBE2014-148, NC2014-99 |
| Volume (vol) | vol.114 |
| Number (no) | no.514(MBE), no.515(NC) |
| Page | pp.177-182 |
| #Pages | 6 |
| Date of Issue | 2015-03-09 (MBE, NC) |
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