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Paper Abstract and Keywords
Presentation 2009-03-11 13:55
Dynamic gain update of the manual following response accompanied by gaze direction change
Naotoshi Abekawa (NTT Comm Sci Labs.), Hiroaki Gomi (NTT Comm Sci Labs/JST-ERATO) NC2008-119
Abstract (in Japanese) (See Japanese page) 
(in English) Sudden visual motion applied during reaching movement induces an involuntary manual responsein the direction of visual stimulus with very short latency (Manual Following Response: MFR).We have previously revealed that the MFR is more greatly induced when the gaze is directed to the reaching-target than when it is not directed.This indicated that the visuomotor gain for the reflexive manual response was modulated by the spatial relationship between reaching-target and gaze point,
but it remains unclear when the MFR gain is updated.To explore whether the gain modulation is completed at the motor planning stage
or the gain modulates in the motor execution stage, we quantified the MFR amplitude after gaze shift during reaching movement.The MFR gain changed according to the gaze location relative to the reaching target after gaze shift,suggesting that the relationship between gaze point and reaching target was being calculated and used for updating the MFR gain continuously throughout the reaching movement.Furthermore, to examine the impact of the attention shift on the MFR modulation,we conducted an experiment in which subjects were asked to shift the spatial attention without shifting gaze during reaching movement.However, the MFR gain was not modulated according to the change of attention location.This indicates that the top-down attention shift is not enough to modulate the MFR gain,but the gaze direction relative to the reaching target would be a significant factor for the MFR gain setting.
Keyword (in Japanese) (See Japanese page) 
(in English) spatial representation / visual feedback / reflexive manual response / on-line visuomotor control / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 480, NC2008-119, pp. 93-98, March 2009.
Paper # NC2008-119 
Date of Issue 2009-03-04 (NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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 NC2008-119

Conference Information
Committee NC MBE  
Conference Date 2009-03-11 - 2009-03-13 
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 2009-03-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Dynamic gain update of the manual following response accompanied by gaze direction change 
Sub Title (in English)  
Keyword(1) spatial representation  
Keyword(2) visual feedback  
Keyword(3) reflexive manual response  
Keyword(4) on-line visuomotor control  
1st Author's Name Naotoshi Abekawa  
1st Author's Affiliation NTT Communication Science Laboratories (NTT Comm Sci Labs.)
2nd Author's Name Hiroaki Gomi  
2nd Author's Affiliation NTT Communication Science Laboratories/JST-ERATOShimojo Project (NTT Comm Sci Labs/JST-ERATO)
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Date Time 2009-03-11 13:55:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2008-119 
Volume (vol) vol.108 
Number (no) no.480 
Page pp.93-98 
Date of Issue 2009-03-04 (NC) 

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