Interpersonal Neurobiology

Definition

Interpersonal Neurobiology (IPNB) is a multidisciplinary approach that looks at how human relationships shape the brain and nervous system over time. It blends neuroscience, psychology, and attachment theory to explain how emotional connection—or lack thereof—impacts mental health. The model emphasizes integration: the ability to connect different parts of the brain and self. In therapy, IPNB supports emotional regulation, secure attachment, and healing through safe, attuned relationships. It helps explain why connection is not just emotional—it’s biological.

Synonyms

IPNB, relational neuroscience, brain-based therapy, mind-body integration, neuropsychology of relationships

Usage Examples

The therapist used interpersonal neurobiology to explain why safe relationships heal trauma—our brains are literally wired for connection and co-regulation.

Historical Background

Coined by Dr. Dan Siegel in the early 2000s, interpersonal neurobiology united research from multiple fields to show that emotional development and brain health are deeply social. The framework helped therapists understand how trauma disrupts neural integration and how healthy relationships can restore it. It is now foundational in attachment-focused and trauma-informed care, influencing how clinicians work with clients across age groups and diagnoses.

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