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The Head-Neck Sensory Motor System$
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Alain Berthoz, Werner Graf, and P. P. Vidal

Print publication date: 1992

Print ISBN-13: 9780195068207

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780195068207.001.0001

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Mathematical Modeling of Visual and Nonvisual Mechanisms of Head-Eye Coordination

Mathematical Modeling of Visual and Nonvisual Mechanisms of Head-Eye Coordination

Chapter:
(p.449) Chapter 70 Mathematical Modeling of Visual and Nonvisual Mechanisms of Head-Eye Coordination
Source:
The Head-Neck Sensory Motor System
Author(s):

Graham R. Barnes

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0070

The gain of eye velocity during head-fixed pursuit is significantly modified by the frequency composition of a mixed-frequency, pseudorandom stimulus. The model of the visual and nonvisual control of smooth eye movement that has been developed is discussed here, as well as the results of a series of experiments related to head-eye coordination. In order to simulate the changes in gain and phase of eye velocity that occur during a number of oculomotor tasks, a model of oculomotor control is presented here. The results of the experiment indicate that there are two separate mechanisms involved in the visual control of eye movement. Evidence suggests that optimal VOR suppression can be achieved only through visual feedback.

Keywords:   vestibulo-ocular reflex, oculomotor control, head-fixed pursuit, visual feedback, gain, eye velocity

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