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