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Paper Abstract and Keywords
Presentation 2018-10-19 17:15
Evaluation of the ambiguity in tilt-translation discrimination by using vestibulo-ocular reflex in goldfish
Masanori Nakano, Yutaka Hirata (Chubu Univ.) NC2018-20
Abstract (in Japanese) (See Japanese page) 
(in English) According to Einstein’s equivalence principle, the otolith organs, which is biological accelerometers in inner ears, cannot distinguish translational motion from tilt motion relative to gravity, and vice versa. This is called tilt-translation ambiguity. Humans can correctly perceive these two types of self-motion even in the dark without visual information. In theory, the tilt-translation ambiguity problem can be solved by a simple differential equation consisting of linear and gravitational accelerations and angular velocity (Angelaki et al., 1999). A previous study showed in monkeys that the cerebellum solves the tilt-translation discrimination problem as Purkinje cells code only translational acceleration information in response to combined tilt-translation stimulations (Yakusheva et al., 2007). However, it is still enigmatic as to how the cerebellar neuronal circuitry solves the tilt-translation ambiguity problem. Presently, as the first step for elucidating cerebellar neuronal mechanism to solve the problem, we investigated in goldfish the vestibulo-ocular reflex (VOR) in the dark elicited by tilt-translation combined stimulations as an indicator of their ability in discriminating tilt from translation. We demonstrate that in normal goldfish, different and proper VOR eye movements were observed during lateral translation and static roll tilt. By contrast, after cerebellectomy, similar VOR eye movements were observed during these different vestibular stimulations. The results suggest that 1) goldfish is a good model system to investigate neuronal mechanisms of the tilt-translation discrimination, and 2) the cerebellum plays a crucial role in solving the tilt-translation ambiguity problem in goldfish as in monkeys.
Keyword (in Japanese) (See Japanese page) 
(in English) Cerebellum / Otolith / Vestibulo-ocular Reflex / Goldfish / Eye movement / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 258, NC2018-20, pp. 39-39, Oct. 2018.
Paper # NC2018-20 
Date of Issue 2018-10-12 (NC) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 NC2018-20

Conference Information
Committee NC MBE  
Conference Date 2018-10-19 - 2018-10-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2018-10-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of the ambiguity in tilt-translation discrimination by using vestibulo-ocular reflex in goldfish 
Sub Title (in English)  
Keyword(1) Cerebellum  
Keyword(2) Otolith  
Keyword(3) Vestibulo-ocular Reflex  
Keyword(4) Goldfish  
Keyword(5) Eye movement  
1st Author's Name Masanori Nakano  
1st Author's Affiliation Chubu University (Chubu Univ.)
2nd Author's Name Yutaka Hirata  
2nd Author's Affiliation Chubu University (Chubu Univ.)
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Date Time 2018-10-19 17:15:00 
Presentation Time 15 
Registration for NC 
Paper # IEICE-NC2018-20 
Volume (vol) IEICE-118 
Number (no) no.258 
Page p.39 
#Pages IEICE-1 
Date of Issue IEICE-NC-2018-10-12 

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