The polyvagal ladder, plainly

You have probably heard of polyvagal theory.

If you have spent any time in trauma-informed circles, somatic therapy, or nervous-system content on the internet, the word "polyvagal" has crossed your path. You have probably heard about the ventral state, the sympathetic state, the dorsal state, and the idea that the body moves between them.

I want to give you the plain version, with the move at each rung, in language that is actually operational. The wellness-content version of this has gotten increasingly abstract. The real version is concrete and immediately useful.

What Porges actually proposed

Stephen Porges is a psychophysiologist who has spent forty years studying the autonomic nervous system. The headline of his work is this: the autonomic nervous system is not a two-state system, the way the field treated it for most of the twentieth century.

The old model was: sympathetic (fight or flight, activation) versus parasympathetic (rest and digest, relaxation). You were either in one or the other. The full range of human nervous-system experience was supposed to fit into those two boxes.

Porges noticed that the model could not explain certain things. Specifically, why some people who looked relaxed (low heart rate, low muscle tone) were actually deeply shut down rather than restful. Why some forms of "calm" were qualitatively different from other forms of "calm." Why social connection felt different from solitary peace.

What he proposed instead was a three-state model. Two parasympathetic states, not one. And a hierarchy among them that the body moves through in a specific order.

The three states — what I have started calling the polyvagal ladder — are these.

Rung one: Ventral vagal

The top of the ladder. The social-engagement state. The state your nervous system is in when it feels safe enough to be present, connected, and curious.

What it feels like in the body: chest is open, breath is moving freely, eyes can soften and meet someone, face is mobile, voice is full, you can hear higher-frequency tones (which is part of why people sound friendlier in this state). You feel like yourself. The world feels approachable. Other people feel approachable.

When you are here, you do not need a practice. You are in the practice. The work, when you are here, is to notice you are here and to let the body have it.

Rung two: Sympathetic

The middle of the ladder. Mobilisation. The state of action.

This is not the bad state. This is the state your body needs to be in to handle anything that requires response — difficult conversations, deadlines, physical effort, the moment your kid runs into the street. The whole-body activation of sympathetic is what allows you to act.

What it feels like in the body: heart rate up, breath shallow and high in the chest, attention narrowed onto a single focus, muscles primed, time can feel either compressed (everything fast) or distorted (everything slow). You feel mobilised. The world feels urgent.

The problem is not being in sympathetic. The problem is being unable to leave. If you stay in sympathetic after the activation is no longer needed — sometimes for days, sometimes for years — the system grinds.

The move at this rung: discharge. The body needs to physically release the mobilisation it built. A walk. A shake. A slow exhale longer than the inhale (this directly activates the vagus nerve, which signals the system to stand down). Movement that lets the body know the mobilisation has done its job.

Rung three: Dorsal vagal

The bottom of the ladder. Shutdown.

This is the oldest part of the autonomic nervous system — the part we share with reptiles. It is the state the body drops into when neither fight nor flight is available, or when fight and flight have been tried and have not worked. It is the freeze state. The collapse state. The dissociation state.

What it feels like in the body: heart rate slows, breath becomes shallow but slow, body becomes heavy, eyes lose focus, voice loses inflection, you feel far from yourself. The world becomes muted. Other people feel far away. Time may feel like it is dragging.

This is not laziness. This is not depression in the clinical sense (though chronic dorsal can produce depressive symptoms). This is the nervous system's survival response when the cost of being present is more than the system can bear.

The move at this rung is different from the move at sympathetic. You cannot discharge here, because there is nothing mobilised to discharge. The work is to gently mobilise — slow movement, warmth, light social contact, something small that asks the body to come back online.

The order of movement matters

Here is the part of the theory that gets missed.

The body does not skip rungs. It climbs them and descends them in order. From dorsal, you cannot go directly to ventral. You have to go through sympathetic first — you have to mobilise on the way up. This is why people coming out of a depressive state often feel anxious first; the system is climbing through sympathetic to get back to ventral.

From ventral, when activation arrives, you drop into sympathetic. If sympathetic does not work, or works too long, you drop into dorsal.

The healthy pattern is mobilising up and down freely. The unhealthy pattern is getting stuck on any one rung.

How to use this in your day

Three small practices, one for each rung.

When you are in ventral — let yourself be there.

You do not need a practice when you are in ventral. The practice is the awareness. The instinct to optimise something even when you feel good is itself a low-grade activation. Notice when you feel like yourself. Let the body have the state without trying to use it for anything.

When you are in sympathetic — discharge, do not suppress.

The mistake most people make in sympathetic is to try to skip back to ventral by relaxing. This rarely works, because the body has built mobilisation and the mobilisation needs to go somewhere. The move is to discharge it — a slow exhale (extended exhale, vagal brake), shake your hands, walk briskly, run if you can. The mobilisation is asking to be used. Use it briefly, then let it go.

When you are in dorsal — warm and small.

The mistake in dorsal is to try to motivate. The body cannot receive motivation in this state. The move is to introduce something small that asks the body to come online without overwhelming it. Warmth (a hot drink, a warm shower, a heavy blanket). A short walk in good light. Light contact with someone who is in ventral themselves. Small. Warm. Patient.

Why this matters in the framework

The polyvagal ladder is one of the foundational mental models of the work I do.

Almost every protocol in The Installation is calibrated to which rung the practitioner is on. The somatic work that lands deeply in ventral does not land at all in dorsal — the body cannot receive it. The reconsolidation work that requires sympathetic activation to be safe to enter cannot be done while the body is mobilised against the protocol itself.

Module 1 of the curriculum is the polyvagal map, in detail. The practice library has the polyvagal ladder tool for naming your state in two minutes, which is the first move of every protocol.

The ladder is not just a diagnostic. It is a map of which work is possible from where you are right now. Once you can read where you are, the work in front of you becomes specific. Which is the whole point.