Amygdala volume and social network size in humans
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We found that amygdala volume correlates with the size and complexity of social networks in adult humans. An exploratory analysis of subcortical structures did not find strong evidence for similar relationships with any other structure, but there were associations between social network variables and cortical thickness in three cortical areas, two of them with amygdala connectivity. These findings indicate that the amygdala is important in social behavior.
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In humans, social network size significantly correlates with grey matter density of regions constituting the social brain, including the amygdala and posterior superior temporal sulcus (STS).
“In humans, studies have shown that social network size significantly correlates with grey matter density of regions constituting the social brain”
From Baboons (Papio anubis) living in larger social groups have bigger brains. (2021) · cites this paper as Bickart et al., 2011
Greater amygdala volume is linked to more social sensitivity in general rather than specifically to threats.
“For example, large amygdala volume is positively associated not only with separation anxiety (Redlich et al., 2015) but also with mental state inference (Rice et al., 2014) and social network size and complexity (Bickart et al., 2011, Kanai et al., 2012), including in adolescents (Von der Heide et al., 2014).”
From Adolescent neurobiological susceptibility to social context (2016) · cites this paper as Bickart et al., 2011
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- Authors
- Bickart, K. C., Wright, C. I., Dautoff, R. J., Dickerson, B. C., & Barrett, L. F.
- Affiliations
- Boston University (US)
- Harvard University (US)
- Northeastern University (US)
- Corresponding author
- Barrett, Lisa Feldman
- Venue
- Nature Neuroscience
- Published
- 2010-12-26
- Volume
- 14
- Issue
- 2
- Pages
- 163-164
- ISSN
- 1097-6256 (ISSN-L)
- 1546-1726
- PMC
- PMC3079404
- OpenAlex
- W2089304376
- Cited by
- 556
- References
- 53
- Citations by year
- 2026: 22 · 2025: 17 · 2024: 25 · 2023: 34 · 2022: 34 · 2021: 35 · 2020: 95 · 2019: 25 · 2018: 37 · 2017: 26 · 2016: 45 · 2015: 30 · 2014: 34 · 2013: 38 · 2012: 38
- FWCI
- 40.91
- Type
- journal article
- Language
- en
- Update notices
- erratum (2011-08-26)
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Nature Neuroscience (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (DP1OD003312)
- National Institute on Aging (R21-AG29840, R21AG029840, R01AG030311, R01AG029411)
- Topics
- Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Keywords
- amygdala volume, social network size, subcortical structures, cortical thickness, amygdala connectivity, human brain
- MeSH terms
- Adult, Aged, Aged, 80 and over, Amygdala, Humans, Interpersonal Relations, Middle Aged, Organ Size, Social Behavior, Social Support, Linear Models
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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