Impaired emotion regulation is a core feature of borderline personality disorder (BPD) and a known driver of functional impairment, interpersonal difficulties, self-harm, and suicidality. Emotion regulation refers to the ways in which people influence and control which emotions they have, when they have them, and how they experience and express them. Effective emotion regulation is a precursor to success in a range of adaptive processes including decision making, impulse control, communication and social interaction, work performance and productivity, and goal achievement, with subsequent positive effects on mood stability and well-being.

Front-line behavioral approaches to teach effective emotion regulation skills in BPD (e.g. DBT) have been moderately successful, but outcomes are limited by high dropout rates due to lengthy treatment protocols and pre-existing deficits in the neurocircuitry supporting engagement in emotion regulation, with poorer outcomes in individuals with more severe emotion dysregulation.

In this pilot feasibility trial, we aim to test an approach to improving emotion dysregulation in BPD by combining neuromodulation using transcranial magnetic stimulation (TMS), to improve functioning of emotion regulation related neurocircuitry, with an intensive, brief emotion regulation skills training protocol. Through this combined approach, we hypothesize increased gains in emotion regulation ability, decreased treatment dropout rates, and improved positive outcomes in patients with BPD.