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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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Visual and Vestibular Contributions to Head-Eye Coordination during Head-Free Pursuit

Visual and Vestibular Contributions to Head-Eye Coordination during Head-Free Pursuit

Chapter:
(p.443) Chapter 69 Visual and Vestibular Contributions to Head-Eye Coordination during Head-Free Pursuit
Source:
The Head-Neck Sensory Motor System
Author(s):

Graham R. Barnes

Jane F. Lawson

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0069

This chapter presents the results of the experiments that indicate that there is little evidence to support the existence of a central cancellation mechanism of the VOR in normal human subjects, as proposed by Robinson. The changes in gaze velocity with the frequency composition of the stimulus are discussed in this chapter. The enhancement of the highest frequency component is presented. The role of the vestibulo-ocular reflex during head-free pursuit is analyzed and investigated here. It is concluded that although there is little evidence to support the central cancellation hypothesis, other nonvisual mechanisms may have a role in vestibulo-ocular reflex suppression.

Keywords:   vestibulo-ocular reflex, head-eye coordination, head-free pursuit, frequency components, nonvisual mechanisms

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