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Paper Abstract and Keywords
Presentation 2006-03-15 13:00
Activity patterns of the isthmo-optic neurons and their relations with head movements in head-unrestrained quails
Hiroshi Ohno, Osamu Setoyama, Hiroyuki Uchiyama (Kagoshima Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Retinopetal neurons in the isthmo-optic nucleus (ION) send their axons to the contralateral retina in birds. The centrifugal visual projection is thought to be involved in attentional modulation of retinal output. We recorded activity of neurons in the ION in awake, head-unrestrained Japanese quails using an implanted electrode assembly. Head movements were videotaped with a high-speed video camera (100fps). We found two distinct types of activity pattern: phasic and tonic. The majority of neurons in the ION discharge in a phasic manner. Phasic and tonic cells are also different one from another in relation to head movements. Phasic cells show phasic elevation of activity about 50ms before head movements to its receptive field direction, while tonic cells show tonic suppression during head movements. We will discuss the activity profiles of neurons in the ION in terms of their possible role in visually guided behaviors.
Keyword (in Japanese) (See Japanese page) 
(in English) Retina / Centrifugal projection / Isthmo-optic nucleus / Selective attention / / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 657, NC2005-108, pp. 15-19, March 2006.
Paper # NC2005-108 
Date of Issue 2006-03-08 (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) Activity patterns of the isthmo-optic neurons and their relations with head movements in head-unrestrained quails 
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 Hiroshi Ohno  
1st Author's Affiliation Kagoshima University (Kagoshima Univ.)
2nd Author's Name Osamu Setoyama  
2nd Author's Affiliation Kagoshima University (Kagoshima Univ.)
3rd Author's Name Hiroyuki Uchiyama  
3rd Author's Affiliation Kagoshima University (Kagoshima Univ.)
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Speaker Author-1 
Date Time 2006-03-15 13:00:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2005-108 
Volume (vol) vol.105 
Number (no) no.657 
Page pp.15-19 
#Pages
Date of Issue 2006-03-08 (NC) 


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