What is Autonomic Nervous System?
The autonomic nervous system (ANS) controls involuntary bodily functions: heart rate, breathing, digestion, blood pressure, temperature regulation. It operates largely outside conscious control.
Two Branches
| Branch | Function | State | |--------|----------|-------| | Sympathetic | Mobilization | Fight or flight | | Parasympathetic | Recovery | Rest and digest |
Polyvagal Refinement
Stephen Porges' Polyvagal Theory — a debated model, not established physiology — proposes dividing the parasympathetic into ventral vagal (social engagement, safety) and dorsal vagal (freeze, shutdown). Many physiologists dispute these premises; see the autonomic nervous system.
In ONDA Life
In the terms of polyvagal theory (a debated model), Part 5 aims for a ventral-vagal state of "calm alertness" — the heart beats powerfully and steadily, the brain is ready for effective dominance rather than panic.