Cited by 113Anxiety, Depression, Psychometrics, Treatment, Cognitive ProcessesStress Responses and CortisolMemory and Neural Mechanisms

Neural mechanisms underlying heterogeneity in the presentation of anxious temperament

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Shackman, Alexander J., Fox, Andrew S., Oler, Jonathan A., Shelton, Steven E., Davidson, Richard J., Kalin, Ned H.·2013·Proceedings of the National Academy of Sciences

Abstract

Children with an anxious temperament (AT) are at risk for developing psychiatric disorders along the internalizing spectrum, including anxiety and depression. Like these disorders, AT is a multidimensional phenotype and children with extreme anxiety show varying mixtures of physiological, behavioral, and other symptoms. Using a well-validated juvenile monkey model of AT, we addressed the degree to which this phenotypic heterogeneity reflects fundamental differences or similarities in the underlying neurobiology. The rhesus macaque is optimal for studying AT because children and young monkeys express the anxious phenotype in similar ways and have similar neurobiology. Fluorodeoxyglucose (FDG)-positron emission tomography (FDG-PET) in 238 freely behaving monkeys identified brain regions where metabolism predicted variation in three dimensions of the AT phenotype: hypothalamic-pituitary-adrenal (HPA) activity, freezing behavior, and expressive vocalizations. We distinguished brain regions that predicted all three dimensions of the phenotype from those that selectively predicted a single dimension. Elevated activity in the central nucleus of the amygdala and the anterior hippocampus was consistently found across individuals with different presentations of AT. In contrast, elevated activity in the lateral anterior hippocampus was selective to individuals with high levels of HPA activity, and decreased activity in the motor cortex (M1) was selective to those with high levels of freezing behavior. Furthermore, activity in these phenotype-selective regions mediated relations between amygdala metabolism and different expressions of anxiety. These findings provide a framework for understanding the mechanisms that lead to heterogeneity in the clinical presentation of internalizing disorders and set the stage for developing improved interventions.

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  • The central nucleus can initiate a broad spectrum of defensive responses through efferent projections to brain regions that directly mediate behavioral, physiological, and cognitive features of anxiety.

    “the Ce can initiate a broad spectrum of defensive responses via efferent projections to the brain regions that directly mediate many of the behavioral, physiological, and cognitive features of anxiety11, 18-19.”
  • In young monkeys, individual differences in central nucleus metabolism are trait-like and predict substantial variation in anxious temperament.

    “in young monkeys individual differences in Ce metabolism are trait-like and predict substantial variation in the AT phenotype10-13.”

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Authors
Shackman, A. J., Fox, A. S., Oler, J. A., Shelton, S. E., Davidson, R. J., & Kalin, N. H.
Affiliations
  • Department of Psychiatry,
  • University of Wisconsin–Madison (US)
Venue
Proceedings of the National Academy of Sciences
Published
2013-03-28
Volume
110
Issue
15
Pages
6145-6150
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2163421192
Cited by
113
References
93
Citations by year
2026: 1 · 2025: 6 · 2024: 7 · 2023: 11 · 2022: 5 · 2021: 9 · 2020: 11 · 2019: 8 · 2018: 8 · 2017: 8 · 2016: 16 · 2015: 9 · 2014: 11 · 2013: 3
FWCI
17.57
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (RR000167, MH084051, HD003352, P51OD011106)
  • National Institute of Mental Health (MH084051, MH046729, R21MH091550, MH018931, MH081884, MH091550, P50MH084051, R01MH043454, R01MH046729, T32MH018931, R01MH081884)
  • National Center for Research Resources (RR 000167, P51RR000167)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P30HD003352, HD003352, F32HD008352, HD008352)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
anxious temperament, phenotypic heterogeneity, rhesus monkeys, brain glucose metabolism, central amygdala, anterior hippocampus, freezing behavior, vocalizations, motor cortex, internalizing disorders, anxiety, depression
MeSH terms
Amygdala, Animals, Anxiety, Brain, Brain Mapping, Depression, False Positive Reactions, Female, Hippocampus, Hydrocortisone, Macaca mulatta, Male, Models, Neurological, Phenotype, Radioimmunoassay, Time Factors, Models, Animal, Neuroimaging

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