Polyvagal Theory, developed by Stephen Porges, provides a neuroscience framework that explains many aspects of personality in terms of the nervous system's safety-detection mechanisms.
The Three States of Polyvagal Theory and Personality
Ventral vagal (safe and social): Optimal state for connection, learning, and personality management
Sympathetic mobilization (fight or flight): Anxiety-type personality responses
Dorsal vagal shutdown (freeze/collapse): Depression and dissociation-type personality
Neuroception and Personality
Neuroception — the body's unconscious safety-detection — can be dysregulated in personality, causing false alarms (sensing danger when safe) that drive personality responses.
Polyvagal-Informed Personality Treatment
Therapy that acknowledges the body's state — helping clients move into ventral vagal 'safe and social' — transforms personality management.
Safe relationships, co-regulation, and body-based practices are particularly emphasized.