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CORTICOFUGAL FIBRES TO THE NUCLEI OF THE DORSAL COLUMNS

CORTICOFUGAL FIBRES TO THE NUCLEI OF THE DORSAL COLUMNS CORTICOFUGAL FIBRES TO THE NUCLEI OF THE DORSAL COLUMNS A N EXPERIMENTAL STUDY IN THE CAT BY FRED WALBERG Anatomical Institute, University of Oslo, Norjvay INTRODUCTION I N a recent anatomical study Brodal, Szabo and Torvik (in press) have shown that following lesions of widespread regions of the cerebral cortex in the cat, terminal degeneration is present in all subdivisions of the sensory trigeminal nucleus and the nucleus of the solitary tract. The authors do not commit themselves as to the course of these corticofugal fibres to the sensory cranial nerve nuclei, but some of their observations favour the assumption that the fibres descend among those of the pyramidal tract. They also consider it likely that the corticofugal fibres may mediate the physiologically observed inhibitory eflfects on the central propagation of afferent messages through the trigeminal nucleus described by Hernandez- Pe6n and Hagbarth (1955) and Hernandez-Pe6n and Scherrer (1955). The termination of corticofugal fibres in the different subdivisions of the sensory trigeminal nucleus and in the nucleus of the solitary tract suggests that the cortical effects on central transmission may involve different kinds of somatic as well as visceral impulses. In view of these findings it was deemed worth http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Brain Oxford University Press

CORTICOFUGAL FIBRES TO THE NUCLEI OF THE DORSAL COLUMNS

WALBERG, FRED
Brain , Volume 80 (2) – Jun 1, 1957
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Publisher
Oxford University Press
Copyright
© Oxford University Press
ISSN
0006-8950
eISSN
1460-2156
DOI
10.1093/brain/80.2.273
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Abstract

CORTICOFUGAL FIBRES TO THE NUCLEI OF THE DORSAL COLUMNS A N EXPERIMENTAL STUDY IN THE CAT BY FRED WALBERG Anatomical Institute, University of Oslo, Norjvay INTRODUCTION I N a recent anatomical study Brodal, Szabo and Torvik (in press) have shown that following lesions of widespread regions of the cerebral cortex in the cat, terminal degeneration is present in all subdivisions of the sensory trigeminal nucleus and the nucleus of the solitary tract. The authors do not commit themselves as to the course of these corticofugal fibres to the sensory cranial nerve nuclei, but some of their observations favour the assumption that the fibres descend among those of the pyramidal tract. They also consider it likely that the corticofugal fibres may mediate the physiologically observed inhibitory eflfects on the central propagation of afferent messages through the trigeminal nucleus described by Hernandez- Pe6n and Hagbarth (1955) and Hernandez-Pe6n and Scherrer (1955). The termination of corticofugal fibres in the different subdivisions of the sensory trigeminal nucleus and in the nucleus of the solitary tract suggests that the cortical effects on central transmission may involve different kinds of somatic as well as visceral impulses. In view of these findings it was deemed worth

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Brain – Oxford University Press

Published: Jun 1, 1957

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