An autoradiographic study of the efferent connections of the entorhinal cortex in the rat

The Journal of Comparative Neurology
J M Wyss

Abstract

The longer connections of the entorhinal cortex have been studied autoradiographically in a series of rats, each of which received a small injection of 3H-amino acids in one of the various cytoarchitectonic subfields of the entorhinal cortex. The major findings can be summarized as follows. Whereas the projection of the lateral entorhinal area (LEA) to the dentate gyrus is broad in its longitudinal extent, the medial entorhinal area (MEA), and especially the ventral portion of this zone, projects in a more lamellar fashion. In the transverse plane the LEA preferentially projects to the inner (dorsal) blade of the dentate gyrus, while the MEA innervates both blades equally. Within the radial dimension, the entorhinal cortex projects to the dentate gyrus according to a medial to lateral gradient, with lateral portions of the LEA projecting along the pial surface and successively more medial portions of the entorhinal projecting closer to the granule cells. The commissural entorhinal to dentate projections are similar to the ipsilateral projections in location; however, they are considerably reduced in septotemporal extent and do not arise from cells in the ventral half of either LEA or the intermediate entorhinal area (IEA). The ...Continue Reading

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Citations

Sep 23, 1997·The Journal of Comparative Neurology·C LimC B Saper
Mar 10, 1998·The Journal of Comparative Neurology·R D Burwell, D G Amaral
Aug 14, 1998·The Journal of Comparative Neurology·C L Dolorfo, D G Amaral
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Apr 18, 2003·Hippocampus·Renata Bartesaghi, Tiziana Gessi
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Sep 29, 2009·Neuroscience Bulletin·Ming-Gang Liu, Jun Chen
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