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Paper Abstract and Keywords
Presentation 2008-03-13 11:30
Effects of lesions of the isthmo-optic nucleus on visual search
Takahiro Fukunaga, Ryuichi Yamaguchi, Ryota Tsugami, Hiroshi Ohno, Hiroyuki Uchiyama (Kagoshima Univ.) MBE2007-111
Abstract (in Japanese) (See Japanese page) 
(in English) The avian isthmo-optic system is hypothesized to be involved in attentional control of retinal output. In the present study, we lesioned the isthmo-optic nucleus (ION) in order to investigate contribution of the ION to visual search. Japanese quails were trained to perform visual search tasks, in which the animals search a target stimulus among distracter stimuli. Before and after the lesions of the ION, response times (RTs) to the target stimulus and success rates (SRs) of search were compared. In all three animals with complete and near-complete lesions of the ION, postlesion RTs were longer than prelesion RTs. Also, SRs were decreased by the lesions in two animals out of the three animals, particularly in the peripheral visual field. Thus the isthmo-optic system is shown to be involved in improvement of visual search extending to the peripheral visual field.
Keyword (in Japanese) (See Japanese page) 
(in English) Retina / Centrifugal projection / Isthmo-optic nucleus / Selective attention / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 541, MBE2007-111, pp. 25-28, March 2008.
Paper # MBE2007-111 
Date of Issue 2008-03-06 (MBE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
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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 MBE 
Conference Code 2008-03-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effects of lesions of the isthmo-optic nucleus on visual search 
Sub Title (in English)  
Keyword(1) Retina  
Keyword(2) Centrifugal projection  
Keyword(3) Isthmo-optic nucleus  
Keyword(4) Selective attention  
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1st Author's Name Takahiro Fukunaga  
1st Author's Affiliation Kagoshima University (Kagoshima Univ.)
2nd Author's Name Ryuichi Yamaguchi  
2nd Author's Affiliation Kagoshima University (Kagoshima Univ.)
3rd Author's Name Ryota Tsugami  
3rd Author's Affiliation Kagoshima University (Kagoshima Univ.)
4th Author's Name Hiroshi Ohno  
4th Author's Affiliation Kagoshima University (Kagoshima Univ.)
5th Author's Name Hiroyuki Uchiyama  
5th Author's Affiliation Kagoshima University (Kagoshima Univ.)
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Speaker Author-1 
Date Time 2008-03-13 11:30:00 
Presentation Time 20 minutes 
Registration for MBE 
Paper # MBE2007-111 
Volume (vol) vol.107 
Number (no) no.541 
Page pp.25-28 
#Pages
Date of Issue 2008-03-06 (MBE) 


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