Intro to Polyvagal Theory: How Understanding Your Nervous System Can Help You Heal
For almost two decades, I worked as a paramedic. I saw what stress can do to people — and I felt it in my own body. Sirens at 2 a.m., heart pounding as we raced through empty streets, the smell of fuel and antiseptic in the back of the ambulance… and then the quiet moments afterward, when your body is still braced for impact even though the crisis has passed. You don’t need to have worked in emergency services to know that feeling. These days, stress finds us all. Two parents working just to cover the bills. Groceries costing more each week. No real “off switch” because there’s always another demand waiting. Our bodies were never designed to live in this constant state of alert — but here we are.
And over time, it changes you.
You might notice you’re more irritable, quicker to snap. Or maybe you feel flat, disconnected — like you’re watching life happen from behind glass. You start to believe things like:
- The world is unsafe.
- It’s my fault.
- I’m unworthy of love.
These aren’t random thoughts. They’re stories your mind tells to match the state your nervous system is in. And that’s where Polyvagal Theory comes in — not as an abstract concept, but as a map that can help you understand what’s going on inside you, and more importantly, how to find your way back to feeling safe and connected again.
So… What Is Polyvagal Theory?
Polyvagal Theory, developed by Dr. Stephen Porges, explains how your nervous system reacts to the world — and how those reactions shape your feelings, your thoughts, and your relationships.
Here’s the key idea: your nervous system is always scanning your environment for cues of safety or danger. It’s not asking your permission — it’s just doing it, moment to moment, without your conscious input. And when it picks up on something it thinks is dangerous (whether that’s a real threat or just a raised eyebrow from your boss), it shifts your body into different “states” designed to protect you.
If you can learn to recognize those states, you can work with your nervous system instead of feeling like you’re fighting against yourself.
A Quick Tour of Your Autonomic Nervous System
The autonomic nervous system runs all the automatic functions in your body — breathing, heartbeat, digestion — without you having to think about them. It’s made up of two main branches:
Sympathetic Nervous System – This is your fight, flight, or freeze mode. It’s like your body’s accelerator, pumping out stress hormones like adrenaline and cortisol, raising your heart rate, sharpening your senses. Great if you’re facing a tiger… not so great if it’s just your inbox.
Parasympathetic Nervous System – This is your rest-and-digest mode, slowing your heart rate, deepening your breathing, and bringing you back to balance. This branch is largely influenced by the vagus nerve — which is where Polyvagal Theory gets its name.
Meet the Vagus Nerve — Your Built-In Safety Switch
Think of the vagus nerve as your body’s communication highway between your brain and the rest of you. According to Polyvagal Theory, it has two main branches:
- Ventral Vagal (Front) – When this is active, you feel safe and grounded. You’re able to connect with people, think clearly, and feel like yourself. This is where healing and growth happen.
- Dorsal Vagal (Back) – When you’ve been overwhelmed for too long, your body might hit the brakes hard, sending you into shutdown. You might feel numb, foggy, heavy, or disconnected. It’s not weakness — it’s your body conserving energy when life feels like too much.
How These States Feel in Real Life
We all shift between these states every day — sometimes subtly, sometimes dramatically. Here’s how they might show up:
- Ventral Vagal (Safe & Social) – You feel calm, curious, open. Your chest feels light, your breathing easy, and you can be present in conversations.
- Sympathetic (Fight or Flight) – Your heart’s racing, thoughts are spinning, maybe your shoulders are up around your ears. Everything feels urgent.
- Dorsal Vagal (Freeze/Shutdown) – You feel heavy, flat, maybe even invisible. The world feels far away, and getting off the couch feels impossible.
None of these states are “bad.” They’re all part of your body’s survival toolkit. The key is learning to notice them and knowing how to move between them when you need to.
Your Nervous System Is On Your Side
This is the part I wish everyone knew: your nervous system is always trying to protect you. It’s not broken, and it’s not out to ruin your life — it’s doing the best it can with the information it’s been given, often based on past experiences.
The first step toward change isn’t to “fix” yourself, but to get curious. What state am I in right now? What does it feel like in my body? From there, you can start making choices — even small ones — that help you shift toward safety and connection.
Next Time…
In my next post, I’ll share practical ways to help your nervous system find its way back to balance. We’ll talk about how to “climb” the Polyvagal ladder, step by step, and I’ll bring in some of the tools I use both in my counselling work and in my own life — especially those rooted in the outdoors, where nature does some of the regulating for us.
By Noel Morton – Counsellor, Outdoor Enthusiast, and Former Paramedic with 19+ Years on the Front Lines
