Resting-State Functional Connectivity Associated With Extraversion and Agreeableness in Adolescence
Leehyun Yoon1, Angelica F Carranza1, Johnna R Swartz1
1Department of Human Ecology, University of California, Davis, Davis, CA, United States.
Frontiers in Behavioral Neuroscience
|January 20, 2022
Summary
Adolescent brain connectivity differs by sex for extraversion and agreeableness. This study reveals sex-specific neural patterns linked to personality, impacting social development.
Area of Science:
- Neuroscience
- Developmental Psychology
- Social Neuroscience
Background:
- Adolescence involves significant brain development, personality shifts, and social changes.
- Neural underpinnings of personality dimensions like extraversion and agreeableness in adolescents are understudied.
- Sex-specific brain maturation necessitates examining gender differences in adolescent personality correlates.
Purpose of the Study:
- To investigate associations between adolescent brain functional connectivity and personality traits (extraversion, agreeableness).
- To explore sex-specific relationships between personality dimensions and brain connectivity patterns.
- To understand the neurobiological basis of social behavior differences in adolescence.
Main Methods:
- Resting-state functional magnetic resonance imaging (fMRI) was used on 70 adolescents (ages 12-15).
- Seed-to-whole brain connectivity analyses focused on the amygdala.
- Whole-brain and within-network connectivity were analyzed using 415 brain regions across 8 networks and subcortex.
Main Results:
- Amygdala connectivity with specific cortical regions showed sex-specific associations with extraversion.
- Agreeableness was positively associated with amygdala connectivity to occipital and parietal regions, uniformly across sexes.
- Whole-brain analyses revealed sex-specific connectivity patterns between attention, default mode, salience, and control networks related to extraversion.
Conclusions:
- Intrinsic functional connectivity contributes to individual differences in adolescent extraversion and agreeableness.
- Significant sex-specific neural connectivity patterns are associated with these personality dimensions.
- Findings deepen understanding of neurobiological correlates of adolescent personality and social development.
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