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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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Neural Processes between Visual Sign Stimuli and Head Movements in Toads

Neural Processes between Visual Sign Stimuli and Head Movements in Toads

Chapter:
Chapter 9 Neural Processes between Visual Sign Stimuli and Head Movements in Toads
Source:
The Head-Neck Sensory Motor System
Author(s):

Jörg-peter Ewert

Evelyn Schürg-pfeiffer

Wolfgang Will iSchwippert

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0009

Considering the neural visuomotor processes obtained by behaviorally relevant sign stimuli, it was realized that investigations in mammals are very intricate. In mammals, the retina is functionally divided into an event-signaling periphery and a central fovea. The oculomotor system is adapted to this property. If an object appears in the peripheral visual field, eye movements direct the fovea to the locus of interest. These ballistic eye movements are relatively fast and not object-specific but event-related. Once the fovea is on target, feedback-guided fixation and smooth-pursuit eye movements provide the conditions for feature analysis and recognition, which are criteria to select the necessary goal-directed behavior.

Keywords:   neural visuomotor process, oculomotor system, eye movements, fovea, feedback-guided fixation, smooth-pursuit eye movements

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