Cited by 46Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeural dynamics and brain function

Muscarinic control of long-range GABAergic inhibition within the rhinal cortices

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Apergis-Schoute, John, Pinto, Aline, Paré, Denis·2007·The Journal of Neuroscience

Abstract

The perirhinal cortex plays a critical role in memory formation, in part because it forms reciprocal connections with the neocortex and entorhinal cortex and is thus in a position to integrate and transfer higher-order information to and from the hippocampus. However, for reasons that remain unclear, perirhinal transfer of neocortical inputs to the entorhinal cortex occurs with a low probability. Using patch recordings in vitro and tract-tracing combined with GAD-67 immunohistochemistry, we show that the perirhinal cortex contains GABAergic neurons with long-range projections to superficial entorhinal cells. This finding challenges the traditional model of cortical inhibition in which all trans-areal inhibition is thought to be disynaptic because the axons of GABAergic interneurons are assumed to be confined within the area in which their somata are located. Moreover, consistent with recent studies indicating that the formation of perirhinal-dependent memories requires activation of muscarinic receptors, long-range IPSPs were presynaptically inhibited by M2 receptor activation. Overall, these results suggest that long-range feedforward inhibition regulates perirhinal transfer of neocortical inputs to the entorhinal cortex, but that cholinergic inputs can presynaptically adjust the impact of this control mechanism as a function of environmental contingencies.

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Crossref · 10.1523/jneurosci.0068-07.2007

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  1. Alonso A (2002) Electrophysiology of neurones in the perirhinal and ento- rhinal cortices and neuromodulatory changes in firing patterns. In: The parahippocampal region (Witter MP, Wouterlood F, eds), pp 89 -105. Oxford: Oxford UP.

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Authors
Apergis-Schoute, J., Pinto, A., & Paré, D.
Affiliations
Rutgers, The State University of New Jersey (US)
Venue
The Journal of Neuroscience
Published
2007-04-11
Volume
27
Issue
15
Pages
4061-4071
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2010288797
Cited by
46
References
86
Citations by year
2026: 1 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 5 · 2016: 3 · 2015: 6 · 2013: 5 · 2012: 4
FWCI
1.32
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (0208712)
  • National Institute of Mental Health (R01MH073610, MH073610)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
muscarinic receptors, M2 muscarinic receptor, perirhinal cortex, entorhinal cortex, GABAergic interneurons, long-range inhibition, feedforward inhibition, presynaptic inhibition, inhibitory postsynaptic potentials, cholinergic modulation, memory formation, hippocampus
MeSH terms
Animals, gamma-Aminobutyric Acid, Glutamate Decarboxylase, Guinea Pigs, Isoenzymes, Nerve Net, Neural Inhibition, Entorhinal Cortex, 6-Cyano-7-nitroquinoxaline-2,3-dione, Excitatory Postsynaptic Potentials, Receptor, Muscarinic M2, Inhibitory Postsynaptic Potentials

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