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Paper Abstract and Keywords
Presentation 2011-12-20 16:10
Estimation of the neural circuit for the command generation in an insect brain
Ikuko Nishikawa, Takayuki Onojima (Ritsumeikan Univ.), Tomoki Kazawa, Shigehiro Namiki (Univ. Tokyo), Hidetoshi Ikeno (Univ. Hyodo), Ryohei Kanzaki (Univ. Tokyo) NC2011-95
Abstract (in Japanese) (See Japanese page) 
(in English) We report an approach to estimate the functional connection from the possible anatomical connections and physiological response of each neuron. Here we focus on the brain of Bombyx mori, a male silkmoth, which exhibits a programmed behavior for the pheromone orientation on a pheromone detection. The neuroethological experiments revealed that the motor command is generated in the premotor center, composed of the lateral accessory lobe (LAL) and the ventral protocerebrum (VPC). The morphology and the physiological response to the pheromone stimulus are obtained for each main type of LAL-VPC neuron through the intensive electro-physiological and immunohistochemical experiments. However, how the motor command is generated in LAL-VPC, or the information pathway in the network, is still unknown. That is, each piece of puzzle is fairly well investigated, though they are not yet fit in to reveal the whole picture. The goal of our present study is to investigate the functional connection in LAL-VPC to elucidate the mechanism of the motor command generation for the programmed behavior. The present approach is to consider an artificial three-layered neural network to solve an optimization problem based on the above findings of LAL-VPC neuron as the constraints. The optimal solution is the connection which reproduces the observed response best, and we search it through the learning of the artificial neural network. Then, the obtained connection is evaluated by a simulation of LAL-VPC network to reproduce the network dynamics.
Keyword (in Japanese) (See Japanese page) 
(in English) Functional Connection / Insect Brain / Bombyx mori / Premotor Center / Odor Source Orientation / Estimation / Optimization / Back-propagation  
Reference Info. IEICE Tech. Rep., vol. 111, no. 368, NC2011-95, pp. 65-68, Dec. 2011.
Paper # NC2011-95 
Date of Issue 2011-12-13 (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 NC2011-95

Conference Information
Committee NC MBE  
Conference Date 2011-12-20 - 2011-12-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2011-12-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimation of the neural circuit for the command generation in an insect brain 
Sub Title (in English)  
Keyword(1) Functional Connection  
Keyword(2) Insect Brain  
Keyword(3) Bombyx mori  
Keyword(4) Premotor Center  
Keyword(5) Odor Source Orientation  
Keyword(6) Estimation  
Keyword(7) Optimization  
Keyword(8) Back-propagation  
1st Author's Name Ikuko Nishikawa  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Takayuki Onojima  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Tomoki Kazawa  
3rd Author's Affiliation the University of Tokyo (Univ. Tokyo)
4th Author's Name Shigehiro Namiki  
4th Author's Affiliation the University of Tokyo (Univ. Tokyo)
5th Author's Name Hidetoshi Ikeno  
5th Author's Affiliation University of Hyogo (Univ. Hyodo)
6th Author's Name Ryohei Kanzaki  
6th Author's Affiliation the University of Tokyo (Univ. Tokyo)
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Speaker Author-1 
Date Time 2011-12-20 16:10:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2011-95 
Volume (vol) vol.111 
Number (no) no.368 
Page pp.65-68 
#Pages 4 
Date of Issue 2011-12-13 (NC) 

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