The Overlap of CPTSD and BPD: Trauma, Diagnosis, and Neurobiological Insights

This presentation by Dr. Dawn-Elise Snipes delves into the significant overlap between Complex Post-Traumatic Stress Disorder (CPTSD) and Borderline Personality Disorder (BPD), arguing that many BPD symptoms can be understood as manifestations of unresolved trauma. It challenges traditional diagnostic approaches, particularly the tendency to "diagnosis stack," and advocates for viewing these conditions through a trauma-informed lens. The core argument is that both CPTSD and BPD often stem from adverse childhood experiences, attachment disruption, and ongoing traumatic situations, leading to similar maladaptive patterns in cognition, emotion, and behavior.

While the DSM-5-TR currently lacks CPTSD, the ICD-11 explicitly recognizes it and notes its overlap with personality disorders. The presentation highlights that CPTSD typically arises from prolonged or repeated trauma, whereas BPD symptoms often emerge in adolescence, though early childhood trauma is a common precursor for both. A crucial distinction is that BPD requires five out of nine symptoms, while CPTSD, as presented, requires all listed characteristics. However, Dr. Snipes meticulously demonstrates how symptoms like re-experiencing, avoidance, hypervigilance, affect dysregulation, unstable self-image, and relational difficulties, though explicitly diagnostic for CPTSD, are also implicitly or functionally present in BPD.

Clinicians are advised against diagnosis stacking, which can foster hopelessness in patients. Instead, for those presenting with CPTSD symptoms in regions using the DSM-5-TR, diagnosing PTSD or "other specified trauma and stressor related disorder" while noting CPTSD features is recommended. A key therapeutic strategy involves strengthening vagal tone through physical activities and distress tolerance skills to regulate the autonomic nervous system. The presentation also emphasizes understanding problematic behaviors, especially in children and adolescents, as communication of unmet needs or fear, rather than inherent pathology.

The discussion has profound implications for how mental health professionals conceptualize and treat trauma-related disorders. It calls for a re-evaluation of personality disorder diagnoses, particularly BPD, by recognizing their roots in trauma and the adaptive nature of the resulting behaviors. Furthermore, the presentation explores the neurobiological underpinnings, including autonomic nervous system dysregulation, systemic inflammation, and imbalances in hormones and neurotransmitters, underscoring the physiological impact of trauma. This integrated perspective promotes a more compassionate and effective approach to recovery, moving beyond pathologizing labels to address the underlying causes of distress.

"a personality disorder is a pervasive disturbance in how another and how an individual experiences and thinks about the self others and the world manifested in maladaptive patterns of cognition emotional experience emotional expression and behavior"

"individuals with cptsd usually meet the diagnostic requirements for personality disorders now this comes out of the icd1"

"adverse childhood experiences and attachment disruption are traumatic"

"additional co-occurring diagnoses should not be made if the symptoms are fully accounted for by complex post-traumatic stress disorder"

"personality disorder diagnoses though are pathologizing many therapists I hope it's not most anymore but it probably is hear the term personality disorder and think intractable issue"

"these behaviors developed as a way to help the person survive"

"their inner child their wounded inner child is going hey I remember this and this is awful"

"every patient I've worked with with borderline personality was extremely hyper Vigilant to signs of Abandonment or rejection"

"when people's stress response is triggered their prefrontal cortex isn't they are in emotion-based reasoning"

"all of the diagnostic criteria and borderline personality can be represented by diagnostic criteria in PTSD or cptsd part of that is due to the fact that both PTSD cptsd and borderline personality emanate their root cause is trauma and disregulation of the autonomic nervous system"

"symptom onset can occur even years after exposure to a traumatic event or in response to an acute stressor"

"childhood trauma may increase the r risk of BPD or cptsd due to alterations in the autonomic nervous system"