Cited by 671Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchRegulation of Appetite and Obesity

Connections of the rat lateral septal complex 1Published on the World Wide Web on 2 June 1997. 1

Risold, P.Y, Swanson, L.W·1997·Brain Research Reviews

Abstract

The organization of lateral septal connections has been re-examined with respect to its newly defined subdivisions, using anterograde (PHAL) and retrograde (fluorogold) axonal tracer methods. The results confirm that progressively more ventral transverse bands in the hippocampus (defined by the orientation of the trisynaptic circuit) innervate progressively more ventral, transversely oriented sheets in the lateral septum. In addition, hippocampal field CA3 projects selectively to the caudal part of the lateral septal nucleus, which occupies topologically lateral regions of the transverse sheets, whereas field CA1 and the subiculum project selectively to the rostral and ventral parts of the lateral septal nucleus, which occupy topologically medial regions of the transverse sheets. Finally, the evidence suggests that progressively more ventral hippocampal bands innervate progressively thicker lateral septal sheets. In contrast, ascending inputs to the lateral septum appear to define at least 20 vertically oriented bands or subdivisions arranged orthogonal to the hippocampal input (Risold, P.Y. and Swanson, L.W., Chemoarchitecture of the rat lateral septal nucleus, Brain Res. Rev., 24 (1997) 91-113). Hypothalamic nuclei forming parts of behavior-specific subsystems share bidirectional connections with specific subdivisions of the lateral septal nucleus (especially the rostral part), suggesting that specific domains in the hippocampus may influence specific hypothalamic behavioral systems. In contrast, the caudal part of the lateral septal nucleus projects to the lateral hypothalamus and to the supramammillary nucleus, which projects back to the hippocampus and receives its major inputs from brainstem cell groups thought to regulate behavioral state. The neural system mediating defensive behavior shows these features rather clearly, and what is known about its organization is discussed in some detail.

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Crossref · 10.1016/s0165-0173(97)00009-x

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Authors
Risold, P. Y., & Swanson, L. W.
Affiliations
University of Southern California (US)
Corresponding author
Swanson, L.W
Venue
Brain Research Reviews
Publisher
Elsevier BV
Published
1997-09
Volume
24
Issue
2-3
Pages
115-195
ISSN
0165-0173 (ISSN-L)
OpenAlex
W1989768591
Cited by
671
References
180
Citations by year
2026: 21 · 2025: 28 · 2024: 26 · 2023: 11 · 2022: 28 · 2021: 34 · 2020: 26 · 2019: 27 · 2018: 18 · 2017: 17 · 2016: 22 · 2015: 22 · 2014: 28 · 2013: 25 · 2012: 25
FWCI
2.07
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Research Reviews (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Neurological Disorders and Stroke (NS-16686.)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
lateral septal nucleus, hippocampal projections, subiculum, trisynaptic circuit, hypothalamic nuclei, lateral hypothalamus, supramammillary nucleus, defensive behavior, chemoarchitecture, rats
MeSH terms
Animals, Brain Mapping, Hippocampus, Hypothalamus, Male, Neural Pathways, Synaptic Transmission, Septal Nuclei, Rats, Sprague-Dawley, Rats

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