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| Presentation | 2008-03-12 11:30 Difference between motor-learning-strategies for gradual and sudden visuomotor rotations Naoki Saijo (NTT), Hiroaki Gomi (NTT/JST)  NC2007-134 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Previous studies have suggested that a gradually introduced visuomotor discrepancy results in more complete visuomotor adaptation for goal-directed reaching than a suddenly introduced one. However, it is unclear what mechanism allows such a complete adaptation. Here, we investigated the computational mechanism of the visuomotor adaptation for suddenly or gradually introduced visuomotor discrepancy. Subjects practiced a fast center-out reaching with the hand position cursor rotated around the start position. One group of subjects was suddenly exposed to the 60 deg cursor rotation, and that rotation was kept throughout the training. After the training, approximate straight hand trajectory was observed with an elongated reaction time. On the other hand, another group of subjects, who were exposed to the cursor rotations updated incrementally up to 60 deg, generated the curved trajectory without changes in the reaction time after the training. When the hand cursor was turned off, the reaching endpoint was away from the target position. Additionally, the analysis of the response to the visual perturbation reveals that the visual feedback gain increased after the training. Taken together, these results suggest that, in the visuomotor rotation task, the motor planning process adapts to reduce the sudden large error, and that the motor execution process, including the visual feedback controller, adapts to reduce the small error without changes in the motor planning process. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | motor control / adaptation / visuomotor rotation / feedback control / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 542, NC2007-134, pp. 133-138, March 2008. | |
| Paper # | NC2007-134 | |
| Date of Issue | 2008-03-05 (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 | NC2007-134 |
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| Conference Information | |
| Committee | NC MBE |
| Conference Date | 2008-03-12 - 2008-03-14 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tamagawa Univ |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | NC |
| Conference Code | 2008-03-NC-MBE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Difference between motor-learning-strategies for gradual and sudden visuomotor rotations |
| Sub Title (in English) | |
| Keyword(1) | motor control |
| Keyword(2) | adaptation |
| Keyword(3) | visuomotor rotation |
| Keyword(4) | feedback control |
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| 1st Author's Name | Naoki Saijo |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT) |
| 2nd Author's Name | Hiroaki Gomi |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation (NTT/JST) |
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| Speaker | Author-1 |
| Date Time | 2008-03-12 11:30:00 |
| Presentation Time | 20 minutes |
| Registration for | NC |
| Paper # | NC2007-134 |
| Volume (vol) | vol.107 |
| Number (no) | no.542 |
| Page | pp.133-138 |
| #Pages | 6 |
| Date of Issue | 2008-03-05 (NC) |
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