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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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Control of Vertical Head Movement via Forel's Field H

Control of Vertical Head Movement via Forel's Field H

Chapter:
(p.345) Chapter 52 Control of Vertical Head Movement via Forel's Field H
Source:
The Head-Neck Sensory Motor System
Author(s):

Tadashi Isa

Toru Itouji

Shigeto Sasaki

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195068207.003.0052

Reticulospinal neurons (RSNs) in the medial pontomedullary reticular formation have been suggested as being the relay station of the disynaptic pathways from the superior colliculus and the cerebral cortex to the dorsal neck motoneurons. A unilateral lesion of the nucleus reticularis pontis caudalis (NRPC) and the rostral part of the nucleus reticularis gigantocellularis (NRG) produced by kainic acid injection resulted in a severe impairment of ipsiversive orienting movements of the eyes and head in the horizontal direction. This suggests that this region plays a vital role in controlling horizontal orienting movement. However, vertical orienting movement appeared to be unfazed after the lesion, suggesting that it is regulated by separate pathways.

Keywords:   reticulospinal neurons, kainic acid injection, pathways, direction, eyes, head

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