Cited by 29Memory and Neural MechanismsMemory Processes and InfluencesNeuroscience and Neuropharmacology Research

Muscarinic receptors activity in the perirhinal cortex and hippocampus has differential involvement in the formation of recognition memory

Balderas, Israela, Morin, Jean-Pascal, Rodriguez-Ortiz, Carlos J., Bermudez-Rattoni, Federico·2012·Neurobiology of Learning and Memory

Abstract

In this work we probed the effects of post-trial infusions of the muscarinic receptor antagonist scopolamine on object recognition memory formation. Scopolamine was infused bilaterally immediately after the sample phase in the perirhinal cortex or dorsal hippocampus and animals were tested for short-term (90 min) or long-term (24 h) memory. Results showed that scopolamine impaired short-term memory when injected in either the perirhinal cortex or hippocampus. Nevertheless, scopolamine disrupted long-term memory when administrated in the perirhinal cortex but not when applied in the hippocampus. Long-term memory was unaffected when scopolamine was infused 160 min after the sample phase or 90 min before test phase. Our data indicate that short-term recognition memory requires muscarinic receptors signaling in both the perirhinal cortex and hippocampus, whereas long-term recognition memory depends on muscarinic receptors in the perirhinal cortex but not hippocampus. These results support a differential involvement of muscarinic activity in these two medial temporal lobe structures in the formation of recognition memory.

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Crossref · 10.1016/j.nlm.2012.03.006

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Authors
Balderas, I., Morin, J.-P., Rodriguez-Ortiz, C. J., & Bermudez-Rattoni, F.
Affiliations
Universidad Nacional Autónoma de México (MX)
Corresponding author
Balderas, Israela
Venue
Neurobiology of Learning and Memory
Publisher
Elsevier BV
Published
2012-05
Volume
97
Issue
4
Pages
418-424
ISSN
1074-7427 (ISSN-L)
OpenAlex
W2037075758
Cited by
29
References
36
Citations by year
2025: 2 · 2024: 1 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 5 · 2016: 1 · 2015: 1 · 2014: 3 · 2013: 4 · 2012: 3
FWCI
1.80
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Learning and Memory (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
muscarinic receptors, scopolamine, object recognition memory, perirhinal cortex, hippocampus, short-term memory, long-term memory, medial temporal lobe, cholinergic neurotransmission, memory formation
MeSH terms
Animals, Hippocampus, Male, Memory, Short-Term, Receptors, Muscarinic, Scopolamine, Temporal Lobe, Rats, Wistar, Muscarinic Antagonists, Recognition, Psychology, Rats, Memory, Long-Term

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