Polyvagal Theory, developed by Stephen Porges,¹ describes how the vagus nerve has evolved in layers, each supporting a different survival strategy. The nervous system doesn't simply switch between "on" and "off" — it navigates between distinct physiological states.
Three States
| State | Branch | Experience | Behavior | |-------|--------|------------|----------| | Ventral vagal | Myelinated vagus | Safety, connection | Social engagement | | Sympathetic | Spinal nerves | Mobilization | Fight or flight | | Dorsal vagal | Unmyelinated vagus | Shutdown | Freeze, collapse |
Key Insight
We can "drift" between states. The goal is not to eliminate sympathetic activation but to use it skillfully — accessing energy for action without collapsing into panic or rage.
In ONDA Life
Part 4 trains the nervous system to transition smoothly between Ventral Vagus (safety, social engagement) and Sympathetic (energy for maneuver). Sympathetic tone becomes fuel for precision rather than a trigger for overwhelm.
References
- •Porges, Biol Psychol (2007) — Polyvagal Theory