An autoradiographic study of the organization of the efferent connections of the hippocampal formation in the rat

The Journal of Comparative Neurology
L W Swanson, W M Cowan

Abstract

The efferent connections of the hippocampal formation of the rat have been re-examined autoradiographically following the injection of small quantities of 3H-amino acids (usually 3H-proline) into different parts of Ammon's horn and the adjoining structures. The findings indicate quite clearly that each component of the hippocampal formation has a distinctive pattern of efferent connections and that each component of the fornix system arises from a specific subdivision of the hippocampus or the adjoining cortical fields. Thus, the precommissural fornix has been found to originate solely in fields CA1-3 of the hippocampus proper and from the subiculum; the projection to the anterior nuclear complex of the thalamus arises more posteriorly in the pre- and/or parasubiculum and the postsubicular area; the projection to the mammillary complex which comprises a major part of the descending columns of the fornix has its origin in the dorsal subiculum and the pre- and/or parasubiculum; and finally, the medial cortico-hypothalamic tract arises from the ventral subiculum. The lateral septal nuclei (and the adjoining parts of the posterior septal complex) constitute the only subcortical projection field of the pyramidal cells in fields CA1-...Continue Reading

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Citations

Jun 24, 1996·The Journal of Comparative Neurology·T E WilliamsW R Woodward
Apr 2, 1999·The Journal of Comparative Neurology·C J Shi, M D Cassell
May 8, 1998·Hippocampus·V SziklasM Petrides
Jan 9, 1999·Hippocampus·M B Moser, E I Moser
May 5, 1999·Hippocampus·A BraginG Buzsáki
Nov 24, 1999·Hippocampus·S R Schultz, E T Rolls
Jul 21, 2000·Hippocampus·N M White, P A Wallet
Apr 18, 2003·Hippocampus·Renata Bartesaghi, Tiziana Gessi
Jan 1, 1982·Experimental Brain Research·S AnschelA A Perachio
Aug 18, 1978·Anatomy and Embryology·A R SchlessingerL W Swanson

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