Emotion avoidance and fear bradycardia in patients with borderline personality disorder and healthy controls.

Publication Type:

Journal Article

Source:

Journal of Behavior Therapy and Experimental Psychiatry, Volume 57, p.6-13 (2017)

DOI:

dx.doi.org/10.1016/j.jbtep.2017.02.001

Keywords:

Freezing; Bradycardia; Emotion regulation; Borderline personality disorder; Avoidance; Stress

Abstract:

Background and objectives: Exaggerated emotional reactivity is supposed to be essential in the etiology of
borderline personality disorder (BPD). More specifically, models of defensive behavior would predict
reduced freezing behavior eindicated by fear bradycardia-in response to threat. This study examined
automatic fear bradycardia responses in BPD versus healthy controls and the role of emotion dysregulation,
more specifically tendencies to avoid emotions.
Methods: Patients with BPD (n ¼ 23) and healthy controls (n ¼ 18) completed questionnaires and then
watched neutral, pleasant and unpleasant pictures while heart rate was assessed.
Results: Emotion avoidance interacted with group: it was associated with distinct autonomic responses
in healthy controls but not in BPD patients. Controls with lower emotion avoidance tendencies showed
bradycardia in response to unpleasant pictures, while controls with higher emotion avoidance tendencies
did not. BPD patients showed no bradycardia, irrespective of their emotion avoidance tendencies.
Limitations: This study is limited by a small sample size. Comorbidity or medication intake were not
controlled for.
Conclusions: The results may suggest impaired automatic defense responses in BPD. Further understanding
of the regulation of distress and defense responses might improve BPD treatment.