Converging Medial Frontal Resting State and Diffusion-Based Abnormalities in Borderline Personality Disorder

Area of Science:

• Neuroimaging
• Psychiatry
• Brain Connectivity

Background:

• Borderline personality disorder (BPD) is characterized by impulsivity and emotional dysregulation.
• Previous research suggests BPD involves abnormalities in the hippocampal-amygdala complex and frontomedial cortex.
• Whole-brain imaging studies in BPD have yielded inconsistent results.

Purpose of the Study:

• To investigate structural and functional brain abnormalities in BPD using a multimodal imaging approach.
• To identify specific brain regions and networks affected in BPD without pre-selected regions of interest.

Main Methods:

• Acquired functional resting-state and diffusion magnetic resonance imaging data from BPD patients and matched controls.
• Generated mean diffusivity and fractional anisotropy images from diffusion data.
• Utilized amplitude of low-frequency fluctuations and global brain connectivity for functional analysis.

Main Results:

• Found convergence of alterations in genual and perigenual structures in BPD patients.
• Observed frontal white matter fractional anisotropy abnormalities surrounding areas of increased mean diffusivity and global brain connectivity.
• Identified increased resting activity in the left hippocampus and amygdala, with heightened functional connectivity to the anterior cingulate.

Conclusions:

• Demonstrated that structural and functional abnormalities in BPD involve temporolimbic and frontomedial structures and their connectivity.
• Confirmed the link between these identified brain structures and the behavioral/clinical symptoms of BPD.