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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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Eye-Head Coordination: Direction-Specific Differences of Horizontal Saccades Executed Toward or Opposite in Direction to Concurrent Head Motion

Eye-Head Coordination: Direction-Specific Differences of Horizontal Saccades Executed Toward or Opposite in Direction to Concurrent Head Motion

Chapter:
(p.467) Chapter 73 Eye-Head Coordination: Direction-Specific Differences of Horizontal Saccades Executed Toward or Opposite in Direction to Concurrent Head Motion
Source:
The Head-Neck Sensory Motor System
Author(s):

Siegbert Krafczyk

Walter Paulus

Thomas Brandt

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0073

In this chapter, the modification of saccades executed during active head or passive body rotation is investigated. An experimental setup was designed, which confined saccades to populations with amplitudes less than 30°. It was found out that due to the nonlinear relationship of amplitude and peak velocity of saccades and a constant contribution of the head rotation velocity, the gaze analysis will show different velocity profiles because of the different saccades types. There are also two proposed mechanisms to explain the duration decrease of about 30% for the total amplitude range studies. The first one is that the saccadic burst rate is changed by superimposing the VOR activity on it. The second is that the saccadic burst modifies an ongoing eye movement.

Keywords:   saccades, eye movement, amplitude range, saccadic burst rate, velocity, modification

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