Alterations in default mode network connectivity during pain processing in borderline personality disorder.

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Default Mode Network (DMN) activity is implicated in self-referential thought and pain processing.
• Altered DMN activity and pain perception are observed in Borderline Personality Disorder (BPD).
• Previous research linked BPD antinociception to altered pain evaluation brain regions.

Purpose of the Study:

• To investigate DMN connectivity during pain processing in BPD patients.
• To link DMN connectivity research with altered pain perception in BPD.

Main Methods:

• A case-control study involving 25 women with BPD and 22 age-matched controls.
• Functional magnetic resonance imaging (fMRI) during painful heat and neutral temperature stimulation.
• Analysis of DMN connectivity using independent component analysis and psychophysiological interaction analysis.

Main Results:

• Patients with BPD exhibited reduced integration of specific brain regions (left retrosplenial cortex, left superior frontal gyrus) into the DMN.
• Higher BPD symptom severity correlated with attenuated DMN signal decrease during painful stimuli.
• Reduced connectivity between the posterior cingulate cortex and left dorsolateral prefrontal cortex was observed in BPD patients during pain.

Conclusions:

• BPD is associated with significant alterations in DMN connectivity, affecting spatial and temporal characteristics.
• These DMN alterations may indicate a different appraisal of pain as less self-relevant and aversive.
• Deficiencies in switching between processing states in BPD may contribute to difficulties in emotional regulation and attention shifting.