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UNIT ACTIVITY IN RETICULAR FORMATION AND NEARBY STRUCTURES

UNIT ACTIVITY IN RETICULAR FORMATION AND NEARBY STRUCTURES AND ROBERT V. DEVIT02 Department of Physiology and Biophysics, University of Washington Seattle 5, Washington for publication January 20, 1954) School of Medicine, (Received INTRODUCTION THROUGH THE WORK of Magoun and his associates (27, 28, 44, 65) and Bremer and Terzuolo (15, 16), portions of the reticular formation are now believed to be the site of a remarkable convergence and interaction of somatic, visceral, auditory, visual and corticofugal inflows. Morin (47) showed that the fast afferent fibers in skin or muscle nerves project into the midbrain tegmentum. Lorente de No (42) recorded sustained activity in reticular neurons and altered such activity by stimulation of central tracts. The present study arose from the preliminary observation (7) that single-unit activity could be evoked in the pons, tegmentum and medial thalamic regions by peripheral stimulation and revealed a remarkable degree of afferent convergence at these sites. Cooper et al. (22, 23) isolated unit activity in the brainstem of goats and described various patterns of spontaneous and evoked repetitive firing. Visual responses were observed in multi-unit (6, 72) and single-unit (23) records from the superior colliculus and in single brainstem reticular units (26) where the responses were more variable than in the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

UNIT ACTIVITY IN RETICULAR FORMATION AND NEARBY STRUCTURES

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Publisher
The American Physiological Society
Copyright
Copyright © 1954 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
Publisher site
See Article on Publisher Site

Abstract

AND ROBERT V. DEVIT02 Department of Physiology and Biophysics, University of Washington Seattle 5, Washington for publication January 20, 1954) School of Medicine, (Received INTRODUCTION THROUGH THE WORK of Magoun and his associates (27, 28, 44, 65) and Bremer and Terzuolo (15, 16), portions of the reticular formation are now believed to be the site of a remarkable convergence and interaction of somatic, visceral, auditory, visual and corticofugal inflows. Morin (47) showed that the fast afferent fibers in skin or muscle nerves project into the midbrain tegmentum. Lorente de No (42) recorded sustained activity in reticular neurons and altered such activity by stimulation of central tracts. The present study arose from the preliminary observation (7) that single-unit activity could be evoked in the pons, tegmentum and medial thalamic regions by peripheral stimulation and revealed a remarkable degree of afferent convergence at these sites. Cooper et al. (22, 23) isolated unit activity in the brainstem of goats and described various patterns of spontaneous and evoked repetitive firing. Visual responses were observed in multi-unit (6, 72) and single-unit (23) records from the superior colliculus and in single brainstem reticular units (26) where the responses were more variable than in the

Journal

Journal of NeurophysiologyThe American Physiological Society

Published: Nov 1, 1954

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