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Association between white matter microstructural changes and aggressiveness. A case-control diffusion tensor imaging

Stephanie Seidenbecher1, Jörn Kaufmann2, Maria Schöne1

  • 1Department of Psychiatry and Psychotherapy, Otto von Guericke University Magdeburg, Magdeburg, Germany.

Neuroimage. Clinical
|November 27, 2024
PubMed
Summary
This summary is machine-generated.

Aggressive behavior is linked to differences in white matter (WM) integrity. This study found increased mean diffusivity (MD) and axial diffusivity (AD) in aggressive martial artists, suggesting WM changes are associated with aggression.

Keywords:
AggressionAxial diffusivity (AD)Diffusion tensor imaging (DTI)Martial artMean diffusivity (MD)White Matter (WM) integrity

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Area of Science:

  • Neurobiology
  • Neuroimaging

Background:

  • Identifying neurobiological risk factors for aggressive behavior is crucial for prevention and treatment.
  • Individual variability in aggression may be linked to cerebral white matter (WM) microstructure.

Purpose of the Study:

  • To characterize microstructural differences in WM integrity in individuals prone to aggression.
  • To test the hypothesis that altered cerebral WM microstructure underlies normal individual variability in aggression.

Main Methods:

  • Diffusion tensor imaging (DTI) was used to examine WM integrity.
  • Tract-based spatial statistics (TBSS) analyzed differences in axial diffusivity (AD), fractional anisotropy (FA), and mean diffusivity (MD).
  • A case-control design compared martial artists (n=29) with aggressive tendencies to healthy controls (n=31).

Main Results:

  • Martial artists exhibited significantly higher aggression levels compared to controls.
  • Increased mean diffusivity (MD) was observed in parietal and occipital areas.
  • Increased axial diffusivity (AD) was found in widespread frontal, parietal, and temporal fiber tracts.
  • Positive associations were identified between AD/MD and appetitive aggression in regions including the corpus callosum and superior longitudinal fasciculus.

Conclusions:

  • Evidence suggests WM microstructural changes are associated with aggressiveness in a community sample.
  • Further longitudinal studies with larger cohorts are needed to explore the dimensional nature of aggression and its neurobiology.