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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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The Superior Colliculus and Head Movements in the Cat

The Superior Colliculus and Head Movements in the Cat

Chapter:
Chapter 45 The Superior Colliculus and Head Movements in the Cat
Source:
The Head-Neck Sensory Motor System
Author(s):

Vivian C. Abrahams

E. Dawne Downey

Adriana A. Kori

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0045

There seems to be little doubt that the superior colliculus of the cat plays a crucial role in head movement. The proof comes largely from a single kind of experiment in which the superior colliculus is stimulated electrically and occasionally chemically. The movements that stimulation generates have long been regarded as close to natural movement. Some believe that stimulating the tectum and protectum led to the animals executing turning movements, and gave to them the term, “visual-grasp reflex.” The experiments by Apter were on anesthetized cats. In this case, crystals of strychnine were place on the exposed superior colliculus. The application of the crystals first caused an increase in the visual evoked potential.

Keywords:   superior colliculus, cats, visual-grasp reflex, Apter, strychnine, head movements

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