Document Detail


Diversity of connections of the temporal neocortex with amygdaloid nuclei in the dog (Canis familiaris).
MedLine Citation:
PMID:  9519547     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Reciprocal connections of amygdaloid nuclei with the temporal neocortex in the dog were investigated. Injections of fluorescent tracers and BDA into particular temporal areas were made in eleven dogs. The topographical arrangement of connections and variations in their density differentiate the temporal neocortex in the dog into a few regions. Among them, the cortex involving the anterior part of the ectosylvian gyrus did not send any amygdalopetal projection. The middle ectosylvian, dorsal zone of the posterior ectosylvian and the anterior part of the Sylvian gyrus were weakly connected with the amygdala. The cortical region involving the ventral zone of the posterior ectosylvian and composite posterior areas, as well as posterior Sylvian gyrus, was characterized by profuse connections with the amygdaloid complex. Cortico-amygdaloid connections originate in the wide cortical area of the auditory cortex of the middle and dorsal part of the posterior ectosylvian gyrus as well as in the auditory association cortex located in the ventral ectosylvian, composite posterior and posterior Sylvian gyri. The connections showed a dorso-ventral gradient of increasing density, in the direction of association fields. The most substantial projection taking rise from the ectosylvian posterior and posterior composite gyri terminated preferentially in the pericapsular sector of the lateral amygdaloid nucleus and, to a lesser degree, in its medial sector. Terminals of connections originating in the Sylvian gyrus occupied preferentially the intermediate part of the lateral nucleus, slightly more medially than that from the ectosylvian and posterior composite areas. Additionally, axonal terminals derived from the composite posterior and Sylvian posterior areas were observed in the basal parvocellular and magnocellular nuclei. Neocortical projections were reciprocated by amygdalofugal connections with two exceptions: the basal magnocellular nucleus was distinguished by a substantial amygdalofugal projection to the temporal neocortex focused on the dorsal Sylvian gyrus, and the central nucleus of the amygdala, in contrast, received an exclusively corticofugal projection.
Authors:
A Kosmal; M Malinowska; A Woźnicka
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta neurobiologiae experimentalis     Volume:  57     ISSN:  0065-1400     ISO Abbreviation:  Acta Neurobiol Exp (Wars)     Publication Date:  1997  
Date Detail:
Created Date:  1998-04-13     Completed Date:  1998-04-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1246675     Medline TA:  Acta Neurobiol Exp (Wars)     Country:  POLAND    
Other Details:
Languages:  eng     Pagination:  289-314     Citation Subset:  IM    
Affiliation:
Department of Neurophysiology, Nencki Institute of Experimental Biology, Warsaw, Poland. aka@nencki.gov.pl
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MeSH Terms
Descriptor/Qualifier:
Amygdala / cytology*
Animals
Dogs
Fluorescent Dyes
Neocortex / cytology*
Neural Pathways
Temporal Lobe / cytology*
Chemical
Reg. No./Substance:
0/Fluorescent Dyes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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