Cited by 57Neurotransmitter Receptor Influence on BehaviorMemory and Neural MechanismsNeural and Behavioral Psychology Studies

Distinct kinds of novelty processing differentially increase extracellular dopamine in different brain regions

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De Leonibus, Elvira, Verheij, Michel M. M., Mele, Andrea, Cools, Alexander·2006·European Journal of Neuroscience

Abstract

Behaviourally relevant novel stimuli are known to activate the mesocorticolimbic dopaminergic (DAergic) system. In this study we tested the reactivity of this system in response to distinct kinds of novelty processing. Using the in vivo microdialysis technique, we measured extracellular amounts of dopamine (DA) in different DAergic terminal regions during a social learning task in rats. In the first session (40 min) rats were exposed to two never previously encountered juveniles (i.e. unconditional novelty). Afterwards, the animals were divided into three groups: Control group was not exposed to any other stimulus; Discrimination group was exposed to one familiar and one new juvenile (i.e. novel stimulus discrimination); and Recognition group was re-exposed to the two familiar juveniles (i.e. familiarity recognition). In both the medial prefrontal cortex and the nucleus accumbens shell DA increased in response to the first presentation of the juveniles, showing that both structures are involved in processing unconditional social novelty. During the novel stimulus discrimination, we found no change in the prefrontal cortex, although DA increased in the accumbal shell in comparison with the group exposed to two familiar juveniles, showing that the shell is also involved in processing novel social stimulus discrimination. None of the stimuli presented affected DA in the accumbal core. This study provided the original evidence that DA in the various terminal regions is differentially coupled to distinct aspects of novelty processing.

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Crossref · 10.1111/j.1460-9568.2006.04658.x

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  • Various types of novelty produce dopamine release in the rat striatum, including social novelty, novel tastes, and novel environments.

    “Microdialysis [90, 91] and fast scan cyclic voltammetry [92] show that various types of novelty produce dopamine release in the rat striatum. These include social novelty [90], novel tastes [91], and novel environments [92].”

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Authors
De Leonibus, E., Verheij, M. M. M., Mele, A., & Cools, A.
Affiliations
  • Radboud University Nijmegen (NL)
  • Sapienza University of Rome (IT)
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2006-03
Volume
23
Issue
5
Pages
1332-1340
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2102622213
Cited by
57
References
38
Citations by year
2025: 2 · 2023: 3 · 2022: 5 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 3 · 2016: 4 · 2015: 4 · 2014: 3 · 2012: 4
FWCI
1.76
Type
journal article
Language
en
Open access
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion)
  • Radboud Repository (Radboud University) (submittedVersion)
Funders
  • Rotary Foundation
  • Ministero dell’Istruzione, dell’Università e della Ricerca
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
novelty processing, extracellular dopamine, social novelty, medial prefrontal cortex, nucleus accumbens shell, nucleus accumbens core, social learning, rats
MeSH terms
Animals, Behavior, Animal, Brain, Dopamine, Male, Sensation, Social Behavior, Rats, Wistar, Microdialysis, Rats

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