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Paper Abstract and Keywords
Presentation 2012-06-28 11:35
A theoretical study of a recurrent neural network in fly visual system II -- A response to a translational stimulus --
Yoshinori Suzuki (Tokyo Tech), Takako Morimoto, Hiroyoshi Miyakawa (Tokyo Univ. Phar. and Life Sci.), Toru Aonishi (Tokyo Tech) NC2012-6
Abstract (in Japanese) (See Japanese page) 
(in English) In the fly visual system, mutual recurrent connections among motion-sensitive neurons (Lobula Plate Tangential Cells (LPTCs)) on both hemispheres have been identified. The fly is an ideal model system to analyze the integration of visual information from both visual hemispheres.
Here, to uncover a role for the mutual recurrent connection in the binocular integration, we construct a mathematical model of the LTPCs circuit consisting of formal neurons. Using the mutual information measure, we numerically quantify the encoding capacity of the LTPCs circuit model in response to the following two kinds of motion stimuli.
One is the rotation stimulus in which each eye receives an equal motion input. The other is the translation stimulus in which each eye receives an opposite motion input. We compare sensitivities of the LTPCs circuit model to these two stimuli with or without the mutual connection. We show that the mutual connection enhances the sensitivity of the neurons to the rotation stimulus whereas the mutual connection suppresses that to the translation stimulus. These results suggest that the LTCPs circuit is sensitive to congruent binocular stimuli and filters out conflicting stimuli due to the mutual recurrent connection between both hemispheres.
Keyword (in Japanese) (See Japanese page) 
(in English) Fly / visual system / LPTCs / noise / binocular vision / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 108, NC2012-6, pp. 31-36, June 2012.
Paper # NC2012-6 
Date of Issue 2012-06-21 (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 NC2012-6

Conference Information
Committee NC IPSJ-BIO  
Conference Date 2012-06-28 - 2012-06-29 
Place (in Japanese) (See Japanese page) 
Place (in English) OIST, Okinawa 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Machine Learning Approach to Biodata Mining, and General 
Paper Information
Registration To NC 
Conference Code 2012-06-NC-BIO 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A theoretical study of a recurrent neural network in fly visual system II 
Sub Title (in English) A response to a translational stimulus 
Keyword(1) Fly  
Keyword(2) visual system  
Keyword(3) LPTCs  
Keyword(4) noise  
Keyword(5) binocular vision  
Keyword(6)  
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1st Author's Name Yoshinori Suzuki  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Takako Morimoto  
2nd Author's Affiliation Tokyo University of Pharmacy and Life Sciences (Tokyo Univ. Phar. and Life Sci.)
3rd Author's Name Hiroyoshi Miyakawa  
3rd Author's Affiliation Tokyo University of Pharmacy and Life Sciences (Tokyo Univ. Phar. and Life Sci.)
4th Author's Name Toru Aonishi  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2012-06-28 11:35:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2012-6 
Volume (vol) vol.112 
Number (no) no.108 
Page pp.31-36 
#Pages 6 
Date of Issue 2012-06-21 (NC) 

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