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Paper Abstract and Keywords
Presentation 2011-03-15 15:50
Neuronal network model of the saccadic eye movement control system
Teruhiko Yamashita, Takeshi Kohama (Kinki Univ.), Yoshimi Kamiyama (Aichi Pref. Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we propose a mathematical model of the saccadic eye movement system based on the neuronal network characteristics of the substantia nigra pars reticulata (SNr), the intermediate layer of the superior colliculus (SC), and the brainstem neurons, all of which are deeply involved in the generation of saccades. The frontal eye field (FEF) is involved in the planning of the direction and amplitude of saccades, and the SC is involved in the generation of the commands for saccades and transmits them to the brainstem; subsequently, the ocular muscles contract to produce saccades. These cortices contain many functionally distinct cell types such as fixation neurons, buildup neurons, and burst neurons. The fixation neurons discharge while maintaining fixation. The buildup neurons become active during the preparatory stages of saccadic eye movements, and the burst neurons become active while executing the saccades. The firing properties of these types of cells have been well described. However, detailed information regarding their network, that is, how they communicate with each other through neural pulses, is not available. Our model can reproduce the properties of neural responses of saccade-related areas in express saccade tasks. In addition, the model can also reproduce the activity of the intermediate-layer neurons of the SC in antisaccade tasks. These results indicate the validity of the mathematical model for the mechanism underlying saccade generation.
Keyword (in Japanese) (See Japanese page) 
(in English) Saccadic eye movement, / Superior colliculus / Brainstem / Neuron network / Mathematical model / / /  
Reference Info. ITE Tech. Rep., vol. 35, no. 16, HI2011-35, pp. 23-26, March 2011.
Paper # HI2011-35 
Date of Issue 2011-03-08 (HI) 
ISSN Print edition: ISSN 1342-6893
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Conference Information
Committee HI  
Conference Date 2011-03-15 - 2011-03-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Univ. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To HI 
Conference Code 2011-03-HI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Neuronal network model of the saccadic eye movement control system 
Sub Title (in English)  
Keyword(1) Saccadic eye movement,  
Keyword(2) Superior colliculus  
Keyword(3) Brainstem  
Keyword(4) Neuron network  
Keyword(5) Mathematical model  
1st Author's Name Teruhiko Yamashita  
1st Author's Affiliation Kinki University (Kinki Univ.)
2nd Author's Name Takeshi Kohama  
2nd Author's Affiliation Kinki University (Kinki Univ.)
3rd Author's Name Yoshimi Kamiyama  
3rd Author's Affiliation Aichi Prefectural University (Aichi Pref. Univ.)
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Speaker Author-1 
Date Time 2011-03-15 15:50:00 
Presentation Time 20 minutes 
Registration for HI 
Paper # HI2011-35 
Volume (vol) vol.35 
Number (no) no.16 
Page pp.23-26 
Date of Issue 2011-03-08 (HI) 

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