Polyvagal Theory

Theoretical Framework

A framework developed by Stephen Porges describing how the autonomic nervous system shifts between three main states — social engagement, fight-or-flight, and shutdown — as it constantly assesses safety.

Also known as: polyvagal, polyvagal framework, polyvagal ladder

Polyvagal theory is a framework developed by neuroscientist Stephen Porges that explains how the autonomic nervous system moves between three main states depending on its moment-to-moment read of safety. Deb Dana’s clinical translation, sometimes called the polyvagal ladder, has made the theory widely used in trauma-informed wellness practice. The three states are ventral vagal (social engagement), sympathetic (fight or flight), and dorsal vagal (shutdown / freeze).

  • Ventral vagal — “safe and social.” You feel settled, curious, able to connect with others and with yourself. Breathing is even. Face, voice, and posture are open. This is the state where self-reflection, play, intimacy, and meaningful processing can happen.
  • Sympathetic — “mobilized.” The nervous system has read a threat and is readying for action. Fight or flight. Heart rate rises, breathing quickens, attention narrows. Useful when there is something real to do; uncomfortable when it stays on in everyday life.
  • Dorsal vagal — “shut down.” The nervous system has concluded that mobilization won’t work — the threat is too big, too inescapable, or too sustained — and it pulls back. Numbness, fog, disconnection, collapse. A last-resort protection.

Why it matters for self-guided practice

Polyvagal theory gives a shared vocabulary for states you were probably already noticing. It also reframes them: what can feel like “I’m broken” or “I’m overreacting” becomes “my nervous system is doing a read of safety, and it’s landed here for a reason.” From there, the work is less about judgment and more about practices that gently invite the system back toward ventral vagal — co-regulation with safe people, rhythmic activity, slow exhales, warmth, play, and enough repetition for the nervous system to learn that safety is real.

Named entities

Polyvagal theory is closely associated with Stephen Porges (who developed the theory) and Deb Dana (who translated it into clinical and self-practice tools). Many trauma-informed frameworks — including EMDR-adjacent practices, Somatic Experiencing, and Sensorimotor Psychotherapy — use polyvagal language as a common reference point.