Brain, Behavior and Evolution
Afferent Connections of the Striatum and the Nucleus accumbens in the Lizard Gekko gecko(Part 1 of 2)Gonzalez A.a · Russchen F.T.b · Lohman A.H.M.ba Departamento de Biología Celular, Facultad de Biología, Universidad Complutense, Madrid, Spain; b Department of Anatomy and Embryology, Vrije Universiteit, Amsterdam, The Netherlands
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Article / Publication Details
Published online: January 30, 2008
Issue release date: 1990
Number of Print Pages: 10
Number of Figures: 0
Number of Tables: 0
ISSN: 0006-8977 (Print)
eISSN: 1421-9743 (Online)
For additional information: https://www.karger.com/BBE
Abstract
The afferent connections of the striatum and the nucleus accumbens of the lizard Gekko gecko were studied with retrograde tracing by means of horseradish peroxidase and Fluoro-Gold and with anterograde tracing by means of Phaseolus vulgaris leukoagglutinin. The striatum receives projections from the cortex, the dorsal ventricular ridge, the lateral amygdaloid nucleus, the globus pallidus, the anterior peduncular nucleus, the ventral tegmental area and substantia nigra, the area ventral to the substantia nigra, and the dorsal thalamus. The nucleus accumbens is projected upon by the cortex, the diagonal band, the ventral pallidum, the lateral preoptic area, the ventral tegmental area, and the dorsal thalamus. The source of the cortical projection to the striatum and the nucleus accumbens is a longitudinal zone in the dorsal cortex that, rostrally in the hemisphere, is located medially and, more caudally, in its middle one third. The medial and rostrolateral areas of the dorsal ventricular ridge each project to the striatum in a vertical zone. The fibers from the caudolateral area of the ridge end in two oblique bands located parallel to the border between the dorsal ventricular ridge and the striatum. The pathways from the mesencephalic tegmentum to the striatum and the nucleus accumbens show a medial to lateral topography. This is similar to the situation in birds, but contrary to that in mammals in which these pathways are extensively interconnected. The specific sensory nuclei of the dorsal thalamus were found to project not only to the dorsal ventricular ridge, but also, and in a topographical fashion, to the striatum. The dorsomedial thalamic nucleus, which innervates the dorsal ventricular ridge, has additional projections to the striatum and the nucleus accumbens. This projection pattern is similar to that of the intralaminar thalamic nuclei of birds and mammals.
© 1990 S. Karger AG, Basel
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Article / Publication Details
Published online: January 30, 2008
Issue release date: 1990
Number of Print Pages: 10
Number of Figures: 0
Number of Tables: 0
ISSN: 0006-8977 (Print)
eISSN: 1421-9743 (Online)
For additional information: https://www.karger.com/BBE
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