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Paper Abstract and Keywords
Presentation 2006-03-17 09:30
On-line visuomotor control mechanism from the viewpoint of coordinate transformation
Naoki Saijo, Hiroaki Gomi (NTT)
Abstract (in Japanese) (See Japanese page) 
(in English) When the visual target is suddenly shifted during a reaching movement, we can adjust our hand movement to the shifted target position with short-latency (< 150 ms). However, the computational mechanism to generate such on-line reaching adjustment is still unclear. In this study we investigated this mechanism from the viewpoint of visuomotor coordinate transformation. We observed the hand response to the target shift in one of eight radial directions. The experimental data show that the direction of the initial phase (150 - 200 ms) of hand response acceleration was slightly biased from the corresponding target shift direction, whereas the direction of the late phase (250 - 300 ms) was little biased. Additionally, when the reaching target shift was introduced by the stimulus without object motion, the response latency was significantly delayed and the directionally biased response was disappeared. These results suggest that the on-line reaching adjustment would be generated by two different mechanisms: a reflexive controller which is induced by visual motion with short-latency and generates spatially inaccurate response, and a voluntary controller which generates spatially accurate response with long-latency. We suggest that the reflexive reaching adjustment would be acted to generate the fast and accurate on-line reaching adjustment for the sudden target shift.
Keyword (in Japanese) (See Japanese page) 
(in English) Motor control / Reaching / Visuomotor coordination / On-line / Reflex / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 659, NC2005-151, pp. 1-6, March 2006.
Paper # NC2005-151 
Date of Issue 2006-03-10 (NC) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee NC  
Conference Date 2006-03-15 - 2006-03-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamagawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To NC 
Conference Code 2006-03-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On-line visuomotor control mechanism from the viewpoint of coordinate transformation 
Sub Title (in English)
Keyword(1) Motor control  
Keyword(2) Reaching  
Keyword(3) Visuomotor coordination  
Keyword(4) On-line  
Keyword(5) Reflex  
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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)
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Speaker Author-1 
Date Time 2006-03-17 09:30:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2005-151 
Volume (vol) vol.105 
Number (no) no.659 
Page pp.1-6 
#Pages
Date of Issue 2006-03-10 (NC) 


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