06/19/2026
One of my favorite protocols that I use in LENS, on my clients, targets this system through BodyLENS (Neurofeedback for your body, not just your head).
Here is a good explanation of that system by equusoma.com & rccs.org.uk:
The Polyvagal Defense Hierarchy describes how the autonomic nervous system responds to perceived threats and safety, influencing emotional and social behaviors.
Overview of the Polyvagal Defense Hierarchy
The Polyvagal Theory, developed by Dr. Stephen Porges, outlines a hierarchy of responses within the autonomic nervous system (ANS) based on neuroception—the brain's ability to assess safety or danger without conscious awareness. This hierarchy consists of three primary states, each associated with different physiological and behavioral responses:
Ventral Vagal State (Social Engagement):
This state is associated with feelings of safety and connection. When the ventral vagus nerve is activated, individuals can engage socially, communicate effectively, and experience emotional regulation. This state promotes prosocial behaviors, such as smiling and eye contact, and is crucial for secure attachment and co-regulation.
Sympathetic State (Mobilization):
Triggered by perceived danger, this state activates the sympathetic nervous system, preparing the body for fight or flight. Physiological responses include increased heart rate and heightened alertness. In this state, individuals may experience anxiety or hypervigilance as they prepare to confront or escape threats.
Dorsal Vagal State (Immobilization):
This state represents a last-resort response to extreme danger, leading to immobilization or shutdown. The dorsal vagus nerve activation can result in feelings of hopelessness, dissociation, or emotional numbness. This response is often seen in trauma survivors who may feel disconnected from themselves and their surroundings.
Implications of the Polyvagal Defense Hierarchy:
Understanding the Polyvagal Defense Hierarchy is essential for recognizing how individuals respond to stress and trauma. It highlights the importance of creating safe environments that promote social engagement and emotional connection. Therapeutic approaches that incorporate Polyvagal Theory can help individuals regulate their nervous systems, fostering resilience and improving emotional well-being.
Conclusion
The Polyvagal Defense Hierarchy provides a framework for understanding the complex interplay between physiological states and emotional responses. By recognizing these states, individuals and practitioners can better navigate the challenges of trauma and stress, ultimately enhancing social connections and emotional health.
