Selective degeneration of two out of the nine types of synapses in cat caudate nucleus after cortical lesions

Selective degeneration of two out of the nine types of synapses in cat caudate nucleus after... 221 31 31 1 1 R. Hassler J. W. Chung U. Rinne A. Wagner Neurobiologische Abteilung Max-Planck-Institut für Hirnforschung Deutschordenstr. 46 D-6000 Frankfurt 71 Federal Republic of Germany Summary In the cat caudate nucleus the same nine types of synapses are found as in putamen and fundus striati. The three parts of the striatum in the strict sense do not differ in the morphological differentiation of synapse types but only in their quantitative distribution. One-third of all synapses in the caudate nucleus are axo-spinous type IV synapses with a curved and divided asymmetric contact. This strongly suggests that the caudate nucleus interneuronal apparatus is dominated by centre-median input, in contrast to the putamen which is controlled by the cortico-striatal input to its internuncial cells and by its strong intrastriatal feedback mechanism. Extensive destruction of the convexity of the cortex and the medial cortex in one hemisphere results in dark degeneration of a large proportion of two of the nine types of caudate synapses: a) the axo-dendritic type VII synapses exciting the large aspiny caudate neurons and b) the axo-spinous type III synapses making contact with the small spiny neurons of the interneuronal cell apparatus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experimental Brain Research Springer Journals

Selective degeneration of two out of the nine types of synapses in cat caudate nucleus after cortical lesions

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Publisher
Springer Journals
Copyright
Copyright © 1978 by Springer-Verlag
Subject
Biomedicine; Neurosciences; Neurology
ISSN
0014-4819
eISSN
1432-1106
DOI
10.1007/BF00235805
Publisher site
See Article on Publisher Site

Abstract

221 31 31 1 1 R. Hassler J. W. Chung U. Rinne A. Wagner Neurobiologische Abteilung Max-Planck-Institut für Hirnforschung Deutschordenstr. 46 D-6000 Frankfurt 71 Federal Republic of Germany Summary In the cat caudate nucleus the same nine types of synapses are found as in putamen and fundus striati. The three parts of the striatum in the strict sense do not differ in the morphological differentiation of synapse types but only in their quantitative distribution. One-third of all synapses in the caudate nucleus are axo-spinous type IV synapses with a curved and divided asymmetric contact. This strongly suggests that the caudate nucleus interneuronal apparatus is dominated by centre-median input, in contrast to the putamen which is controlled by the cortico-striatal input to its internuncial cells and by its strong intrastriatal feedback mechanism. Extensive destruction of the convexity of the cortex and the medial cortex in one hemisphere results in dark degeneration of a large proportion of two of the nine types of caudate synapses: a) the axo-dendritic type VII synapses exciting the large aspiny caudate neurons and b) the axo-spinous type III synapses making contact with the small spiny neurons of the interneuronal cell apparatus.

Journal

Experimental Brain ResearchSpringer Journals

Published: Jan 1, 1978

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