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Related Experiment Video

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Inward versus reward: white matter pathways in extraversion.

R Leshem1, P Paoletti2, C Piervincenzi3

  • 1Department of Criminology, Bar-Ilan University, Ramat-Gan, Israel.

Personality Neuroscience
|May 22, 2020
PubMed
Summary
This summary is machine-generated.

High extraversion scores correlate with reduced white matter connectivity in specific brain regions. This suggests that individual differences in extraversion may be linked to the organization of white matter tracts involved in socioemotional processing.

Keywords:
diffusion tensor imagingextraversioninferior fronto-occipital fasciculus (IFOF)personalitywhite matter integrity

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Area of Science:

  • Neuroscience
  • Psychology
  • Brain Imaging

Background:

  • Extraversion, a key personality trait, significantly influences social behavior.
  • Understanding the neurobiological underpinnings of personality traits like extraversion is crucial.
  • Previous research on extraversion and brain structure is limited, particularly concerning white matter (WM).

Purpose of the Study:

  • To investigate the relationship between extraversion and white matter (WM) microstructure in detail.
  • To explore how WM integrity differs in individuals with varying levels of extraversion.

Main Methods:

  • Utilized diffusion tensor imaging (DTI) to assess WM integrity in 35 healthy volunteers.
  • Measured white matter microstructure using fractional anisotropy, axial, and radial diffusivities.
  • Assessed extraversion using the Eysenck Personality Questionnaire-Revised.

Main Results:

  • Found decreased white matter (WM) connectivity in the right inferior fronto-occipital fasciculus and forceps major in individuals with high extraversion.
  • Correlation analyses revealed significant associations between extraversion scores and WM integrity measures.

Conclusions:

  • Individual differences in extraversion may be associated with distinct white matter (WM) organization.
  • These WM tracts connect frontal, temporal, and occipital areas crucial for socioemotional and control functions.