What is Polyvagal Theory?
Polyvagal Theory, developed by Stephen Porges, proposes that the vagus nerve evolved in layers, each supporting a different survival strategy, and that the nervous system moves between distinct physiological states rather than simply switching "on" and "off". It is a debated model: many physiologists and comparative biologists dispute its anatomical and evolutionary claims. See The Vagus Nerve for what is established.
Three States (as the theory describes them)
| 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 Idea of the Theory
According to the theory, 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
In the terms of polyvagal theory (a debated model), 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) — the theory's own account (a debated model)
Read more, with the evidence → Polyvagal theory: what holds up and what is debated