Projections from the hippocampal region to the mammillary bodies in macaque monkeys

Aggleton, John Patrick ORCID: https://orcid.org/0000-0002-5573-1308, Vann, Seralynne Denise ORCID: https://orcid.org/0000-0002-6709-8773 and Saunders, Richard C. 2005. Projections from the hippocampal region to the mammillary bodies in macaque monkeys. European Journal of Neuroscience 22 (10) , pp. 2519-2530. 10.1111/j.1460-9568.2005.04450.x

Full text not available from this repository.

Abstract

A combination of anterograde and retrograde tracers mapped the direct hippocampal and parahippocampal inputs to the mammillary bodies in two species of macaque monkey. Dense projections arose from pyramidal cells in layer III of the subiculum and prosubiculum, and terminated in the medial mammillary nucleus. While there was no evidence of an input from the dentate gyrus or fields CA1–3, a small contribution arose from the presubiculum and entorhinal cortices. All of the hippocampal and parahippocampal projections to the mammillary bodies appeared to use the fornix as a route. The caudal portions of the subiculum and prosubiculum contained the greatest numbers of cells projecting to the mammillary bodies. A light contralateral projection to the medial mammillary nucleus was also observed, although this appeared to arise primarily from the more rostral portions of the subiculum and prosubiculum. There was a crude topography within the medial mammillary nucleus, with the caudal subicular projections terminating in the mid and dorsal portions of the nucleus while the rostral subicular and entorhinal projections terminated in the ventral and lateral portions of the medial nucleus. Light ipsilateral projections throughout the lateral mammillary nucleus were sometimes observed. Comparisons with related studies of the macaque brain showed that the dense hippocampal projections to the mammillary bodies arise from a population of subicular cells separate from those that project to the anterior thalamic nuclei, even though the major output from the mammillary bodies is to the anterior thalamic nuclei. Other comparisons revealed underlying similarities with the corresponding projections in the rat brain.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology Medicine Neuroscience and Mental Health Research Institute (NMHRI)
Subjects:	R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Uncontrolled Keywords:	entorhinal cortex; fornix; hippocampus; hypothalamus; memory; subiculum; temporal lobe
Publisher:	Wiley-Blackwell
ISSN:	0953-816X
Last Modified:	07 Nov 2023 11:15
URI:	https://orca.cardiff.ac.uk/id/eprint/11372

Citation Data

Cited 69 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item