Cited by 97Memory and Neural MechanismsPrimate Behavior and EcologyAnxiety, Depression, Psychometrics, Treatment, Cognitive Processes

Amygdalectomy and responsiveness to novelty in rhesus monkeys (Macaca mulatta): Generality and individual consistency of effects.

Mason, William A., Capitanio, John P., Machado, Christopher J., Mendoza, Sally P., Amaral, David G.·2006·Emotion

Abstract

Rhesus monkeys (Macaca mulatta) with bilateral ibotenic acid-produced lesions of the amygdala were compared with controls in several novel situations, including exposures to metal objects, toy animals, and a person. Early in testing, the monkeys with lesions showed reduced inhibitions on responsiveness compared with controls. With continuing exposures, differences between groups diminished sharply as inhibitions waned in the controls. This outcome is consistent with the hypothesis that the amygdala mediates caution in initial reactions to ambiguous or threatening novel situations, which, in the absence of adverse consequences, diminishes with repetition. Consistency of individual responsiveness across different situations, including pairing with other monkeys, was substantial in lesioned and normal monkeys, suggesting that stable qualities of temperament influenced the results in both groups.

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Crossref · 10.1037/1528-3542.6.1.73

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29 of 29 references verified0 citation errors · 0 not checkable

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  • Amygdala-lesioned monkeys tend to approach stimuli that healthy monkeys avoid.

    “a tendency for amygdala-lesioned monkeys to approach stimuli that healthy monkeys avoid (15)”

    From Amygdala damage eliminates monetary loss aversion (2010) · cites this paper as [15]

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Authors
Mason, W. A., Capitanio, J. P., Machado, C. J., Mendoza, S. P., & Amaral, D. G.
Affiliations
University of California, Davis (US)
Venue
Emotion
Published
2006
Volume
6
Issue
1
Pages
73-81
ISSN
  • 1528-3542 (ISSN-L)
  • 1931-1516
OpenAlex
W2013500884
Cited by
96
References
31
Citations by year
2026: 1 · 2023: 1 · 2022: 7 · 2021: 10 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 9 · 2015: 6 · 2014: 5 · 2013: 5 · 2012: 5
FWCI
3.08
Type
journal article
Language
en
Open access
closed
Locations
  • Emotion (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Mental Health (MH41479; RO1 MH57502)
  • National Institutes of Health (RR00169)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Keywords
amygdala, amygdalectomy, novelty, rhesus monkeys, ibotenic acid lesions, individual consistency, temperament, fear, novelty seeking
MeSH terms
Amygdala, Analysis of Variance, Animals, Emotions, Exploratory Behavior, Macaca mulatta, Male, Reaction Time, Social Behavior

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