
Trauma and the Nervous System: An Accessible Introduction
Your nervous system remembers what your conscious mind has worked very hard to forget. For driven women who grew up in unpredictable or emotionally unsafe environments, the body’s alarm system learned to stay on — and it never fully turned off. This post explains what’s actually happening in your brain and body, why you feel the way you do, and what it takes to help your nervous system learn that the danger has passed.
- When Your Body Remembers What Your Mind Wants to Forget
- Trauma, the Nervous System, and Why They’re Inseparable
- What the Research Tells Us
- Fight, Flight, Freeze, and Fawn — Plain Language
- Ready to Go Deeper? The Complete Guide
- When the Threat Has Already Passed (Vignette: Camille)
- Both/And: Your Body Isn’t Broken — It Learned
- The Systemic Lens: This Didn’t Happen in a Vacuum
- Where to Go from Here
- You Don’t Have to Figure This Out Alone
- Frequently Asked Questions
- Related Reading
When Your Body Remembers What Your Mind Wants to Forget
You’re in a meeting. Nothing dramatic is happening — a colleague’s voice rises slightly in frustration, or someone’s phone buzzes three times in a row and the sound cuts through the room. And then something shifts in you that you can’t quite name. Your chest tightens. Your jaw clamps. You’re suddenly hyperaware of the door. The words being spoken become somehow distant, like you’re hearing them from underwater, while your heart pounds as if something is about to go wrong.
Nothing is wrong. You know that, intellectually. But your body doesn’t.
Or maybe it’s quieter than that. You’ve been tired for years — not sleepy, but exhausted in a way that sleep doesn’t fix. You go through your days competent, capable, functional. But there’s a flatness underneath everything. A kind of numbness you’ve learned not to question. A distance from your own life that you chalk up to stress or busyness, because the alternative — that something is still happening inside you, something from a long time ago — feels too complicated to look at directly.
If either of those experiences sounds familiar, what you’re feeling has a name. It’s not weakness. It’s not a character flaw. It’s your nervous system doing exactly what it was built to do — and this post is an accessible introduction to why.
Trauma, the Nervous System, and Why They’re Inseparable
When most people think about trauma, they think about memory — the story of what happened, the flashback, the nightmare, the intrusive thought. And those are real. But some of the most important trauma researchers alive today have fundamentally shifted our understanding: trauma isn’t primarily a problem of memory. It’s a problem of the body.
TRAUMA AND THE NERVOUS SYSTEM
Trauma is what happens inside the nervous system when an experience exceeds its capacity to process and integrate. Bessel van der Kolk, MD, psychiatrist and trauma researcher at Boston University School of Medicine and author of The Body Keeps the Score, argues that “the body keeps the score” — meaning that unresolved trauma isn’t stored as a coherent narrative but as sensory fragments, muscle tension, and nervous system states that activate involuntarily, often years after the original event. The nervous system — particularly the autonomic nervous system, which governs our involuntary responses to threat — doesn’t distinguish neatly between past and present. If it learned, at some point, that the world was dangerous, it continues scanning for that danger long after the danger is gone.
Your nervous system is your body’s command center for survival. At its most basic, it’s always asking one question: Am I safe right now? When the answer is yes, it allows the body to rest, connect, digest, and heal. When the answer is no — or even maybe not — it mobilizes resources for protection.
This protection system is ancient. It kept your ancestors alive. And it’s extraordinarily good at its job. The problem isn’t the system itself — it’s when the system gets stuck in threat mode long after the threat is gone. When the body keeps responding to old danger as if it’s happening right now. That’s what we mean when we talk about trauma’s impact on the nervous system: a protective system that can’t find its way back to rest.
The good news — and this is important — is that the nervous system is not fixed. It’s adaptive. It learned, and it can keep learning. Healing is not about erasing what happened. It’s about teaching the nervous system that it’s safe to land.
What the Research Tells Us
Two researchers have done more to shape our understanding of trauma and the nervous system than perhaps anyone else working in the field today.
Stephen Porges, PhD, developmental psychologist and Distinguished University Scientist at Indiana University, developed Polyvagal Theory — a framework that fundamentally changed how clinicians understand the nervous system’s response to threat. Porges PhD identified three distinct states the nervous system can occupy: a social engagement state (when we feel safe and connected), a mobilized threat-response state (fight or flight), and an immobilized shutdown state (freeze or collapse). Crucially, his research showed that these states aren’t simply chosen — the nervous system drops into them automatically, based on cues of safety and danger it detects from the environment, often without our conscious awareness. He called this process neuroception: the body’s unconscious surveillance system, constantly monitoring for threat.
What this means in practice: you don’t always choose to shut down, or freeze, or snap. Sometimes your nervous system makes that decision before your conscious mind has processed what’s happening. Understanding this removes a layer of shame — you weren’t overreacting. Your body was doing its job.
Bessel van der Kolk, MD, psychiatrist and trauma researcher at Boston University School of Medicine and author of the landmark book The Body Keeps the Score, has spent decades documenting how trauma reorganizes the brain and body. His work showed that traumatic memories aren’t stored like regular memories — they’re encoded in the body, in the sensory and emotional systems, rather than in the narrative, verbal parts of the brain. This is why trauma survivors often can’t simply “talk themselves out of” their responses. The body holds what words can’t reach.
Together, the work of Porges PhD and van der Kolk MD points toward the same core insight: healing trauma requires working with the body, not just the mind. Language-based approaches matter, but they’re not the whole story. The nervous system needs to feel safe — not just understand that it is.
Fight, Flight, Freeze, and Fawn — Plain Language
Annie Wright, LMFT
LMFT · Relational Trauma Specialist · W.W. Norton Author
Helping ambitious women finally feel as good as their résumé looks.
Annie Wright is a licensed psychotherapist (LMFT #95719) and trauma-informed executive coach with over 15,000 clinical hours. She works with driven, ambitious women — including Silicon Valley leaders, physicians, and entrepreneurs — in repairing the psychological foundations beneath their impressive lives. Annie is the founder and former CEO of Evergreen Counseling, a multimillion-dollar trauma-informed therapy center she built, scaled, and successfully exited. A regular contributor to Psychology Today, her expert commentary has appeared in Forbes, Business Insider, Inc., NBC, and The Information. She is currently writing her first book with W.W. Norton.



