Organization of identified fiber tracts in the rat fimbria-fornix: an anterograde tracing and electron microscopic study View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1996-05

AUTHORS

G. Adelmann, T. Deller, M. Frotscher

ABSTRACT

The fimbria is a major route for afferent and efferent fibers of the hippocampal formation. However, little is known about the intrinsic organization of the fimbria-fornix complex. In this study, the anterograde tracer Phaseolus vulgaris-leucoagglutinin (PHAL) was used to analyze the ultrastructure and topography of identified fiber tracts within the fimbria-fornix. Septo-hippocampal fibers are loosely distributed throughout the fimbria-fornix. Commissural fibers cross the midline in the ventral hippocampal commissure and form a tight fiber bundle in the fimbria. Crossed entorhino-hippocampal fibers cross the midline in the ventral hippocampal commissure rostral to the commissural fiber bundle, and crossed entorhino-entorhinal fibers pass through the dorsal hippocampal commissure. This suggests a topographical organization of fiber tracts within the fimbria-fornix that reflects the laminar organization of the hippocampal target structure: fibers of the diffusely terminating septohippocampal projection are loosely distributed throughout the fimbria-fornix, while those projections that are known to terminate in specific laminae of the hippocampal formation (commissural projection, crossed entorhino-hippocampal projection) form fiber bundles within the fimbria and the ventral hippocampal commissure. More... »

PAGES

481-493

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00185879

DOI

http://dx.doi.org/10.1007/bf00185879

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1012225698

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/8729966


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