Cited by 34Memory and Neural MechanismsMemory Processes and InfluencesStress Responses and Cortisol

Activation pattern of the limbic system following spatial learning under stress

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Kogan, Inna, Richter‐Levin, Gal·2008·European Journal of Neuroscience

Abstract

Anatomical evidence suggests an interplay between the dorsal CA1 of the hippocampus (CA1), the basolateral amygdala (BLA) and the entorhinal cortex (EC), but their specific interactions in the context of emotional memory remain obscure. Here, we sought to elucidate the activation pattern in these areas following spatial learning under different stress conditions in the Morris water maze, using cAMP response element‐binding protein (CREB) activation as a marker. Stress levels were manipulated by maintaining the water maze at one of two different temperatures: lower stress (warm water) or higher stress (cold water). Three groups of animals were tested under each condition: a Learning group, trained in the water maze with a hidden escape platform; a No‐Platform group, subjected to the maze without an escape platform; and a Naïve group. To evaluate the quality of the spatial memory formed, we also tested long‐term memory retention of the initial location of the platform following an interference procedure (reversal training). In the CA1 and EC, we found different CREB activation patterns for the lower‐ and higher‐stress groups. By contrast, in the BLA a similar pattern of activation was detected under both stress levels. The data reveal a difference in the sensitivity of the memory to interference, with reversal training interference affecting the memory of the initial platform location only under the higher‐stress condition. The results suggest that stress‐dependent alterations in limbic system activation patterns underlie differences in the quality of the memory formed.

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Crossref · 10.1111/j.1460-9568.2008.06034.x

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Authors
Kogan, I., & Richter‐Levin, G.
Affiliations
University of Haifa (IL)
Corresponding author
Richter‐Levin, Gal
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2008-02
Volume
27
Issue
3
Pages
715-722
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2015644952
Cited by
34
References
54
Citations by year
2024: 1 · 2023: 2 · 2020: 1 · 2018: 1 · 2016: 1 · 2015: 3 · 2014: 5 · 2013: 1 · 2012: 5
FWCI
2.41
Type
journal article
Language
en
Open access
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Charles H. Revson Foundation
  • Israel Science Foundation
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
limbic system, spatial learning, stress, hippocampal CA1, basolateral amygdala, entorhinal cortex, CREB activation, emotional memory, memory interference, reversal learning, water temperature stress, memory quality
MeSH terms
Amygdala, Animals, Avoidance Learning, Cold Temperature, Emotions, Hippocampus, Learning, Limbic System, Male, Memory Disorders, Neural Pathways, Neuropsychological Tests, Orientation, Space Perception, Stress, Psychological, Biomarkers, Rats, Wistar, Cyclic AMP Response Element-Binding Protein, Entorhinal Cortex, Maze Learning, Rats

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