Your nervous system doesn’t take orders from your conscious mind. You can tell yourself to relax before a hard conversation, a big presentation or a tense meeting, and your body may not listen. In 1994, psychophysiologist Stephen Porges introduced polyvagal theory, a framework built on a simple but useful idea: Your body runs on three distinct states, and learning to recognize them changes how you understand your own reactions.
Most people have a rough sense of “calm” and “stressed” as opposite ends of one dial. Polyvagal theory replaces that dial with three separate modes, each with its own physical signature and its own purpose. Once you know what to look for, you can more easily spot which you’re in.
What Is Polyvagal Theory?
Polyvagal theory proposes that your autonomic nervous system organizes itself into a hierarchy. At the top sits the ventral vagal state, the one most associated with feeling genuinely safe.
In ventral vagal mode, your voice has natural range, your face is expressive and your thinking stays flexible. This is the state where connection, creativity and clear decision-making actually happen. It’s also the baseline your body defaults to when nothing feels threatening.
Below that sits sympathetic activation, more commonly known as fight-or-flight. Your heart rate climbs, your muscles prep for action and your attention narrows to the perceived threat in front of you. This state is useful in short bursts and exhausting when it doesn’t turn off.
Sympathetic activation isn’t inherently bad. It’s the state that gets you through a genuine deadline crunch or a real emergency. The trouble starts when a nervous system that’s built for short bursts gets stuck running at that pace for weeks or months at a time.
At the deepest level sits the dorsal vagal state: shutdown. When neither fighting nor fleeing feels possible, your body pulls energy inward. Thinking slows, expression flattens and you can feel foggy, numb or strangely far away, even in a room full of people. Shutdown often gets mistaken for laziness, apathy or a lack of investment.
You don’t consciously choose which of these three states you’re in. Your body scans for cues of safety or danger through a process Porges calls neuroception, an automatic, unconscious scan of tone of voice, facial expression and environment that happens faster than conscious thought. By the time you’re aware of how you feel, your body has already picked a state.
How to Recognize the State of Your Nervous System
Start with your breath. Long, easy breaths tend to track with ventral vagal safety. Short, high breaths often ride along with sympathetic activation, and a shallow, barely-there breath can signal dorsal vagal shutdown.
Notice your voice next. A voice with natural pitch variation usually means you’re regulated. A voice that goes flat, monotone or oddly quiet is often a shutdown signal your conscious mind hasn’t caught up to yet.
Pay attention to your thinking too. Flexible, creative thinking belongs to the ventral vagal state. Narrow, urgent, threat-focused thinking belongs to sympathetic activation. Foggy, slow or checked-out thinking usually points to shutdown.
These signals are information about which state your body has already selected.
Try naming it, silently, in the moment. “I’m in fight-or-flight right now” or “This is shutdown” does something small but real. It pulls the reaction out of the background and into view, which is usually the first step toward changing it.
How to Read Other People’s Nervous Systems
The same three states show up in the people around you, and they’re often easier to spot in someone else than in yourself.
A colleague who suddenly goes quiet and unreadable in a meeting isn’t necessarily disengaged. Their body may have shifted into shutdown.
A team member who talks faster, interrupts more or seems unable to sit still is likely running on sympathetic activation.
Neither response tends to improve when you push harder against it. Both tend to ease when the room starts to feel safer.
This is worth noticing in one-on-ones, in tense meetings and in your own home. A raised voice rarely brings someone back into a regulated state. A slower pace, a softer tone and a beat of patience often do more of that work.
The mistake most people make is responding to the behavior instead of the state underneath it. Pushing a shutdown colleague for more energy, or matching a sympathetic colleague’s urgency with your own, tends to reinforce whichever state they’re already stuck in.
What the 2026 Science Debate Means for You
Polyvagal theory isn’t settled science, and it’s worth knowing where the debate currently stands. In early 2026, psychophysiologist Paul Grossman and 38 co-authors published a paper in Clinical Neuropsychiatry arguing that several core claims about vagal anatomy and evolutionary sequencing don’t hold up under scrutiny. Porges published a direct rebuttal in the same journal, arguing the critique misrepresents what the theory actually claims about clinical practice versus underlying anatomy.
Therapist Annie Chen, writing in Psychology Today, makes a related point for anyone applying this outside a lab: Clinical knowledge isn’t built the same way experimental science is. She argues that therapists aren’t working from neurons and synapses. Their sense of what’s happening in a client’s nervous system comes from years of watching people shift in real time, pattern recognition refined over thousands of sessions. That kind of knowing, she argues, doesn’t hinge on whether the anatomical debate gets resolved one way or the other. It’s why she isn’t ready to set polyvagal theory aside just because its underlying mechanics are being contested.
That’s the part worth carrying forward. Whatever the debate ultimately settles on the underlying anatomy, the three states above, and your ability to recognize them in yourself and others, remain a useful and observable lens. That recognition is the skill worth building next.
How to Work With Nervous System States
Recognizing your state is the first skill. Shifting it deliberately, and helping someone else shift theirs is a whole other skill set.
Research on coaching behaviors backs this up. A 2025 conceptual paper drawing on polyvagal theory argues that a coaching leader’s relational cues—a warm tone of voice, attentive listening, a steady presence—function as safety signals the other person’s nervous system picks up on, helping shift them toward the regulated, socially engaged state where real conversation and real change become possible.
Featured image by lumerb/Shutterstock
