Cited by 146Memory and Neural MechanismsStress Responses and CortisolNeuroscience and Neuropharmacology Research

Stress‐induced dynamic routing of hippocampal connectivity: A hypothesis

Segal, Menahem, Richter‐Levin, Gal, Maggio, Nicola·2010·Hippocampus

Abstract

Recent observations have caused a drastic shift in the conception of the hippocampus as a homogeneous structure that subserves cognitive functions, either spatial maps or short term episodic memory, to a structure that is associated with both cognitive and emotional functions. In fact, the assignment of cognitive functions to the hippocampus is restricted to its dorsal sector. In contrast, the ventral hippocampus (VH) appears to be associated with control of behavioral inhibition, stress and emotional memory, but not with strictly cognitive functions. Curiously, the VH but not the dorsal hippocampus (DH) is associated with the development of affective disorders. In line with these collective observations, we and others have found that the ability to evoke a sustained long term potentiation (LTP), a cellular correlate of learning and memory, is much lower in the VH compared to the DH. Strikingly, acute stress as well as direct exposure to corticosterone affect DH and VH in an opposite manner; causing facilitation of LTP in the VH and its suppression in the DH. This double dissociative action results from activation of different steroid receptor species in the DH and VH. Since the DH and VH differ in efferent connectivity, and since the strength of LTP can be considered as an indicator of strength of synaptic connectivity, these results suggest that stress regulates the routes by which the hippocampus is functionally linked to the rest of the brain such that under stress, the ventral route to the amygdala is enabled while the dorsal route to the neocortex is suppressed. This selective routing may underlie the complex outcome of stress on hippocampal and amygdala physiology and behavior. © 2009 Wiley‐Liss, Inc.

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Crossref · 10.1002/hipo.20751

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  • Stress and glucocorticoids affect synaptic plasticity differentially along the hippocampal dorsoventral axis, impairing long-term potentiation in dorsal hippocampus but enhancing it in ventral hippocampus.

    “In addition, stress and glucocorticoids affect synaptic plasticity differentially along the hippocampal dorsoventral axis, impairing long-term potentiation in dorsal hippocampus, but enhancing this process in ventral hippocampus.15,49,118”

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Authors
Segal, M., Richter‐Levin, G., & Maggio, N.
Affiliations
  • Weizmann Institute of Science (IL)
  • University of Haifa (IL)
  • Sheba Medical Center (IL)
Corresponding author
Segal, Menahem
Venue
Hippocampus
Publisher
Wiley
Published
2010-11-24
Volume
20
Issue
12
Pages
1332-1338
ISSN
  • 1050-9631 (ISSN-L)
  • 1098-1063
OpenAlex
W1979019518
Cited by
146
References
58
Citations by year
2025: 2 · 2024: 3 · 2023: 6 · 2022: 2 · 2021: 13 · 2020: 8 · 2019: 6 · 2018: 13 · 2017: 11 · 2016: 7 · 2015: 6 · 2014: 18 · 2013: 15 · 2012: 15
FWCI
9.67
Type
journal article
Language
en
Open access
closed
Locations
  • Hippocampus (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
hippocampal connectivity, ventral hippocampus, dorsal hippocampus, acute stress, corticosterone, long-term potentiation, steroid hormone receptors, amygdala, neocortex, emotional memory, behavioral inhibition, mood disorders
MeSH terms
Amygdala, Animals, Corticosterone, Hippocampus, Nerve Net, Neuronal Plasticity, Stress, Psychological

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