How Trauma Affects our Brain and Body

Have you ever felt triggered when someone says something in a certain tone of voice, a smell reminds you of a past experience, or a door slams shut loudly in the next room—your heart races, your chest tightens, and you prepare for danger? Perhaps you've felt overwhelmingly sad, though you have no explanation for why. These are triggers occurring in your subconscious, body, and nervous system. We aren't necessarily consciously aware of why we are triggered.

This isn't a weakness on your part, or that you are being "too sensitive." This is your brain being triggered by a past event. An event that was either traumatic or impactful enough to still be affecting you today, in the present. 

Your Brain Is Trying to Protect You

In his book The Trauma Spectrum, neurologist Dr. Robert Scaer defines trauma simply: "a life threat in a state of helplessness".  It doesn't require a war or a disaster. Helplessness is the key — the feeling of having no way out, no one to help, and no control.

When we face a threat we can't escape, the brain shifts into the freeze response. Like a possum playing dead, or like a child going very still, hoping not to be noticed. It's a survival mechanism of the body.

In most cases, once the danger has passed, our bodies instinctively know how to let go of the trauma. We shake. We cry. We take shuddering breaths. These aren't signs of falling apart — they're signs of the energetic nervous system doing exactly what it's designed to do: releasing the enormous charge of emotional survival energy that flooded the body during threat, and had nowhere to go.

But when the release of that energy gets interrupted — when we have to hold it together, when we're shamed for crying, when there is no safe place to fall apart, no comfort — that energy doesn't just disappear; it gets stored and archived. It gets filed away in the survival brain as a warning to survive at all costs, and when we were never allowed to feel and to express the fear, the grief, the hurt, and the rage. It gets stuck in our body, in our nervous system, and keeps repeating the pattern, attempting to protect us from any perceived threat.

The blush that rises when we're humiliated. The terror we can't explain. The tightness in the throat before we speak. These are old fears that were never processed and healed. 

Each Unresolved Experience

Each unresolved experience adds to what we might think of as a survival archive — a collection of memories the brain keeps on file because, as far as it's concerned, the threat was never resolved.

Over time, this archive shapes how we function in the world. The brain becomes a pattern-recognition machine tuned to danger, keeping us braced and on edge for anything that threatens our safety.

This is why triggers can feel irrational, and yet, they are undeniable. The brain isn't confused; it's trying to protect you from something, but it never got the signal that the original trauma was over.

For some of us, while we were growing up, the trauma was never over.

When It Starts Early

For those of us who grew up in homes where safety was unpredictable, the pattern goes deeper still.

The brain develops fastest in the first two years of life. The hippocampus — the region that helps us put memories in context, that helps us understand *that was then, this is now* — is still forming. A child whose nervous system is repeatedly activated without repair doesn't just experience stress. They develop in it and around it.

Researcher Dr. Allan Schore's work shows that the part of the brain that regulates emotion develops through relationships — through a caregiver's face, voice, and touch. When those signals are consistent and warm, the child learns to feel safe. When they're absent, cold, or frightening, the child learns that connection is unsafe, unreliable, or always about to disappear.

Some of us grew up learning to need nothing — to be self-sufficient to the point of isolation, because emotional closeness meant exposure to pain. Some of us grew up walking on eggshells, scanning the room for any shift in the atmosphere, never feeling safe.

They were adaptations. The problem is, they weren't meant to last forever.

Trauma Lives in the Present Tense

The strange thing about unresolved trauma is that it doesn't feel like the past. It feels like *now*.

That's because traumatic memories aren't stored the way ordinary memories are. They're held in the body alongside the original physical state — always on high alert for danger. When something resembling the original threat appears, your fight-or-flight-freeze response activates. Not as a memory but as a present experience.

Why We Dissociate from the Trauma

Dissociation is a psychological defense mechanism where the mind disconnects from thoughts, feelings, memories, or surroundings. It acts as an involuntary emergency escape when a traumatic event is too overwhelming to process, allowing the brain to shield you from unbearable pain and terror when physical escape isn't possible. 

Dissociation can range from mild to severe. 

On the mild end — sometimes called emotional numbing or affective flattening — dissociation presents as a persistent state rather than an acute response. The person isn't floaty or frozen — they're just... muted. Life feels grey, distant, joyless. They can function, but nothing moves them; there's no passion or joy. It's one of the reasons it goes unrecognized for so long — it doesn't look like a trauma response, it just looks like depression, or personality.

On the moderate-to-severe end — the disconnection becomes involuntary and begins to interfere with your daily functioning, relationships, or work. It often develops as a protective survival tactic in response to trauma or chronic stress.

As the nervous system governs much of our physical health — digestion, heart rhythm, immune function — when it remains locked in chronic activation, the body keeps score with persistent gut problems, chronic fatigue, allergies, inflammation, and autoimmune diseases.

Healing Is Not Theoretical

The reason I write about this is not just because I find it fascinating. I've been searching for my own healing for most of my life. Growing up in a home with a narcissistic mother whose care was wrapped in criticism, manipulation, and control, and a sexually abusive father, Complex PTSD wasn't a diagnosis I read about — it was a description of my daily life.

I have spent years working on ways to heal and gain freedom from the effects of my trauma. Given the right conditions — safety, acceptance, and effective techniques and modalities that neutralize trauma — our body can achieve resolution. 

Techniques like EFT (Emotional Freedom Techniques) and Matrix Reimprinting work, in part, because they offer the body a chance to complete what was frozen mid-cycle. To release the trauma still held in your system. I create a safe place where clients can finally release stored trauma and allow their survival brain to let go.

If You Recognize Yourself Here

If any of this resonates with you—the hypervigilance, the sensitivity, the way certain experiences seem to pull you out of the present moment and into a reaction—the work now is not to fight what your body has learned. It's to help it release and learn something new. To let go of the trauma response in your body in a safe way. 

Healing is possible. Regulation is possible. And that healing — real, biological, energetic- nervous-system healing with acceptance, love, and compassion — is possible.

*Informed by the research of Dr. Robert Scaer, Dr. Peter Levine, Dr. Stephen Porges, Dr. Allan Schore, Dr. Pat Ogden, and Dr. Diane Poole Heller. With gratitude to Bill Tucker.* 

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