Cited by 512Neuroendocrine regulation and behaviorStress Responses and CortisolNeurotransmitter Receptor Influence on Behavior

Social deprivation of neonatal, adolescent, and adult rats has distinct neurochemical and behavioral consequences

Hall, F. Scott·1998·Critical Reviews™ in Neurobiology

Abstract

This review examines the consequences of social deprivation on brain chemistry and behavior on rats. Although social deprivation produces wide-ranging behavioral and neurochemical effects, it appears that these effects are determined by a number of factors, the most critical factor being the age or developmental stage during the period of deprivation. Roughly, the effects examined in this review may be separated into three major developmental stages and each is related to deprivation of specific types of social interaction: preweaning/neonatal, postweaning/adolescent, and adult. The effects of social deprivation during each of these stages appears to be neurochemically and behaviorally specific. However, much of the research to date has failed to examine deprivation during specific stages, often combining deprivation of different types. Nonetheless, these modifications of experience produce animals of differing phenotypes, which could be characterized as pathological in nature in many instances, and may model particular aspects of human psychopathologies or perhaps the propensity to develop those phenotypic features.

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Crossref · 10.1615/critrevneurobiol.v12.i1-2.50

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  • Complete social isolation in adolescent rodents evokes widespread structural and functional brain changes, most prominently in dopamine and serotonin systems and cortical/striatal targets.

    “Complete social isolation in adolescent rodents evokes widespread structural and functional changes in the brain, most prominently in neuromodulatory dopamine and serotonin systems and particularly within cortical and striatal targets.33, 36, 37”
  • Rodent research shows social isolation causes substantial changes in brain and behaviour, especially if isolation occurs during development.

    “This rodent research has shown that social isolation causes substantial changes in brain and behaviour,31 especially if isolation occurs during development.33, 34”
  • Complete social deprivation during rodent adolescence affects brain development, mainly motivation and reward processes.

    “Thus, complete social deprivation during rodent adolescence affects brain development, mainly affecting motivation and reward processes.33, 36”
  • These brain effects are specific to isolation during rodent adolescence and do not occur to a similar extent when isolation occurs before or after adolescence.

    “Importantly, these effects are specific to isolation during rodent adolescence and do not occur to a similar extent when isolation occurs before or after adolescence.33, 36”
  • Most consistent findings report increased dopamine release in reward regions such as nucleus accumbens and decreased dopamine activity in prefrontal cortex following adolescent isolation.

    “More specifically, although some divergent effects have been observed, the most consistent findings report that dopamine release in reward regions such as the nucleus accumbens increases following adolescent isolation, but dopamine activity in the prefrontal cortex decreases.33, 36, 37”

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Authors
Hall, F. S.
Affiliations
National Institute on Alcohol Abuse and Alcoholism (US)
Corresponding author
Hall, F. Scott
Venue
Critical Reviews™ in Neurobiology
Publisher
Begell House
Published
1998
Volume
12
Issue
1-2
Pages
129-162
ISSN
0892-0915 (ISSN-L)
OpenAlex
W2127857578
Cited by
512
References
0
Citations by year
2026: 7 · 2025: 8 · 2024: 10 · 2023: 15 · 2022: 15 · 2021: 17 · 2020: 13 · 2019: 20 · 2018: 14 · 2017: 17 · 2016: 20 · 2015: 23 · 2014: 19 · 2013: 27 · 2012: 31
FWCI
24.21
Type
journal article
Language
en
Open access
closed
Locations
  • Critical Reviews in Neurobiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
social deprivation, social isolation, developmental stages, neurochemistry, behavioral effects, animal models of psychopathology
MeSH terms
Age Factors, Animals, Animals, Newborn, Behavior, Animal, Brain Chemistry, Critical Period, Psychological, Maternal Deprivation, Social Isolation, Rats

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