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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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Reticulospinal Control of Head Movements in the Cat

Reticulospinal Control of Head Movements in the Cat

Chapter:
(p.311) Chapter 49 Reticulospinal Control of Head Movements in the Cat
Source:
The Head-Neck Sensory Motor System
Author(s):

Shigeto Sasaki

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0049

When a new object appears in the periphery of the visual field, animals direct their head and eyes to it (orienting movements). Movements of the head play a critical role in the orienting movements, especially in animals such as cats, in which the range of oculomotor movements is restricted. The superior colliculus and frontal oculomotor areas have been shown to be in involved in the control of orienting movements. Stimulations of the tectum and the cerebral peduncle have been shown to evoke disynaptic excitatory postsynaptic potentials (EPSPs) in neck motoneurons in cats. The tectal and pyramidal EPSPs are mediated by common relay neurons in the lower brain stem.

Keywords:   orienting movements, cats, superior colliculus, neurons, tectum, cerebral peduncle

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