The borderlines of bipolar affective disorder

Area of Science:

• Psychiatry
• Clinical Psychology
• Mental Health Research

Background:

• Bipolar affective disorder (BAD) and borderline personality disorder (BPD) share overlapping symptoms.
• Existing research often misinterprets this overlap as high comorbidity due to limited studies on both disorders within representative samples.

Purpose of the Study:

• To review major studies on BAD and BPD.
• To assess if BPD could be understood as a variant of BAD.
• To investigate the relationship between BPD and the bipolar disorder spectrum.

Main Methods:

• Literature review of major studies on bipolar affective disorder and borderline personality disorder.
• Analysis of symptomatic overlap, focusing on features like affective instability and impulsivity.
• Examination of clinical, research, and pharmacologic evidence.

Main Results:

• Borderline personality disorder appears to attenuate bipolar disorder along the affective disorder spectrum.
• BPD is present across the bipolar spectrum, from milder to severe presentations.
• The symptomatic overlap between BAD and BPD is significant, with BPD exacerbating BAD symptomatology.

Conclusions:

• Borderline personality disorder may not be a distinct disorder but rather an attenuation of Axis I disorders, particularly bipolar affective disorder.
• BPD features are evident across the bipolar spectrum, influencing symptom severity and recovery prognosis.
• Further research is needed to fully delineate the relationship and shared features of BAD and BPD.