Weak brain function and anxiety-related loop in harm-avoidance personality: A resting-state functional magnetic
Jiaqi Wen1, Tao Guo1, Jingjing Xu1
1Department of Radiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China; Joint Laboratory of Clinical Radiology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Brain Research Bulletin
|December 19, 2024
Summary
Individuals with high harm avoidance (HA) personality traits exhibit reduced brain functional network configurations. This brain pattern may influence emotional regulation by altering amygdala-prefrontal cortex connectivity.
Area of Science:
- Neuroscience
- Psychology
- Brain Imaging
Background:
- Personality significantly shapes individual behavior and emotional expression.
- Understanding the neural basis of personality is crucial for psychological insights.
Purpose of the Study:
- To investigate the brain's functional architecture underlying personality traits.
- To explore the relationship between personality subtypes and brain network configurations.
Main Methods:
- Utilized resting-state functional magnetic resonance imaging (fMRI) in 97 young adults.
- Applied graph theory and network-based analyses to resting-state fMRI data.
- Clustered participants into harm avoidance (HA) and reward dependence (RD) subtypes.
Main Results:
- Harm avoidance (HA) personality was associated with diminished network and node metrics.
- A distinct negative component network was identified in HA subjects.
- Amygdala-inferior parietal gyrus (IPG) functional connectivity mediated the link between HA personality and state anxiety.
Conclusions:
- Decreased functional brain configuration in HA personality may impact emotional processing.
- Altered amygdala-IPG coupling is implicated in the relationship between HA personality and anxiety.
- These findings illuminate the neural mechanisms connecting personality and emotion.
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