State-Dependent Cross-Brain Information Flow in Borderline Personality Disorder

Area of Science:

• Neuroscience
• Psychiatry
• Social Interaction

Background:

• Borderline personality disorder (BPD) is a common psychiatric condition marked by interpersonal conflict.
• The neurobiological underpinnings of social interaction deficits in BPD are not well understood.

Purpose of the Study:

• To investigate social interaction difficulties in BPD using advanced neuroimaging techniques.
• To examine cross-brain neural coupling in individuals with BPD during a joint attention task.

Main Methods:

• Utilized hyperscanning with two functional magnetic resonance imaging (fMRI) scanners to study pairs of participants.
• Examined neural coupling between right temporoparietal junction networks in healthy controls (HC) and individuals with current BPD (cBPD) or remitted BPD (rBPD).
• Analyzed data from 23 cBPD, 17 rBPD, and 80 HC participants.

Main Results:

• Healthy control pairs demonstrated synchronized neural responses.
• Pairs including an individual with current BPD (cBPD-HC) showed significantly reduced neural coupling compared to HC-HC pairs.
• Neural coupling in patients was associated with childhood adversity.

Conclusions:

• Reduced neural coupling represents a neural correlate for core BPD social deficits.
• Hyperscanning may offer state-associated biomarkers for clinical social neuroscience.
• Some BPD-related neural deficits may be reversible, challenging assumptions about personality disorder permanence.