When Theories Evolve: What the “Debunking” of Polyvagal Theory Means for Clinicians and Clients

In recent months, there has been renewed criticism and “debunking” conversations surrounding Polyvagal Theory, originally proposed by Stephen Porges. For many therapists — and many clients — this has felt unsettling.

Polyvagal language has shaped how we talk about trauma, safety, shutdown, and connection. Concepts like ventral vagal, sympathetic activation, and dorsal collapse have become part of the everyday clinical vocabulary.

So what happens when a theory that has been deeply integrated into practice is publicly challenged?

This is a moment not for panic — but for maturation.

What Is Being Critiqued?

Polyvagal Theory proposed a hierarchical model of the autonomic nervous system, often visualized as a ladder:

Top rung (ventral vagal) – safety, connection, social engagement
Middle rung (sympathetic) – mobilization, fight/flight
Bottom rung (dorsal vagal) – shutdown, collapse

Critics argue that certain anatomical and evolutionary claims in the original formulation are not strongly supported by current evidence. Some researchers suggest the nervous system is more integrated and less neatly hierarchical than the “ladder” metaphor implies.

Scientific debate is healthy. Theories evolve. Models refine. That’s how progress happens.

But here’s what’s important:

Challenging aspects of a theory does not automatically invalidate every clinical insight that emerged alongside it.

The Danger of Throwing It All Out

When a framework gets publicly criticized, there’s often a pendulum swing:

“It’s revolutionary!”
“It’s completely wrong!”

Both reactions oversimplify.

As clinicians — and as thoughtful clients — it is rarely wise to discard an entire framework without replacing it with a more nuanced understanding. If we remove a map before studying the terrain more carefully, we can end up disoriented.

Many people have found the polyvagal lens helpful because:

It normalized stress responses.
It reduced shame around shutdown or overwhelm.
It gave language to body-based experiences.
It emphasized safety and co-regulation.

Even if the biological model needs refinement, those clinical principles don’t suddenly lose their value.

The work now is to grow our understanding, not collapse it.

Updating Our Worldview Is a Strength

It can feel destabilizing to learn that something we relied on may not be fully accurate. But intellectual flexibility is a sign of maturity — not weakness.

Science is iterative. We revise. We refine. We expand.

Giving ourselves permission to update our worldview is part of psychological health. We do this all the time:

We update parenting approaches.
We revise nutrition advice.
We refine trauma models.
We shift language as research evolves.

Growth does not require shame about what we once believed.

It requires curiosity.

From Ladders to Airports: A More Flexible Metaphor

The original polyvagal model is often described as a ladder — you climb up toward safety or drop down toward shutdown.

But neuroscientist Lisa Feldman Barrett offers a different way of thinking about how our nervous system operates.

Instead of a ladder, imagine an airport.

In an airport:

Multiple flights are available.
Different destinations are possible.
Conditions shift based on context (weather, traffic, timing).
You don’t “fall down” the airport — you move through gates based on what’s happening.

This metaphor reflects what contemporary neuroscience increasingly suggests:

The brain and body are constantly predicting, adjusting, and responding based on context. States are not rigid rungs. They are dynamic, context-sensitive patterns.

Sometimes mobilization is adaptive.
Sometimes withdrawal is protective.
Sometimes connection feels safe.
Sometimes it doesn’t — depending on history and environment.

An airport metaphor leaves room for complexity. It allows movement without implying failure.

What Remains Clinically Useful?

Even as the science evolves, several ideas remain deeply helpful:

The body is central to emotional experience.
Stress responses are adaptive attempts at protection.
Safety is relational and contextual.
Co-regulation matters.
States shift.

We may refine the neurobiology, but the human experience of overwhelm, mobilization, and shutdown remains real.

What changes is not the lived experience — but how precisely we describe it.

For Clinicians: Practice With Humility

As mental health professionals, our responsibility is not to defend a model — it is to serve people well.

That means:

Staying curious.
Following evidence as it evolves.
Avoiding dogmatism.
Being transparent about uncertainty.
Integrating new research thoughtfully.

It also means resisting the urge to shame ourselves or others for having used a framework that was widely accepted.

We practice in real time with the best knowledge available.

And then we update.

For Clients: You Are Not a Theory

If you’ve resonated with polyvagal language — if it helped you understand your freeze response, your overwhelm, your need for safety — that insight is not erased by academic debate.

Your experience is still valid.

Models are maps.
You are the territory.

We refine maps over time so they better match reality — but the landscape of your nervous system remains worthy of compassion.

Moving Forward With Courage

At Juniper Counselling, we value courage.

It takes courage to question.
It takes courage to update.
It takes courage to let go of certainty without collapsing into cynicism.

The “debunking” of any theory can feel destabilizing. But it can also be an invitation:

To deepen our understanding.
To hold models more lightly.
To remember that science evolves — and so do we.

We don’t need to throw away the ladder before we understand the airport.

We can build better maps — together.