Trauma & Body Connection: The Psoas, Vagus Nerve and Fascia
- karin van der zwan

- Mar 31
- 2 min read

Trauma healing is not only psychological.It is deeply physical.
The connection between trauma and the body lives in three essential structures:the psoas muscle, the vagus nerve, and the fascia.
Understanding this trauma & body connection changes how we approach healing.
The Psoas Muscle
Deep in your core lies what is often called the “muscle of the soul” — the psoas muscle.
The psoas contracts in danger: fight, flight, freeze.Under long-term stress or trauma, it may never fully release.
When the psoas remains contracted, the pelvis is pulled into a chronic survival posture.
This can contribute to chronic pain and digestive issues, as the psoas pulls the diaphragm downward and tightens the lower belly.
The result is shallow, chest-based breathing and difficulty accessing a full, relaxed inhale.
In trauma healing, restoring softness and mobility to the psoas is often essential.
The psoas stores the memory of unsafety.Unresolved emotions cannot release until conscious healing begins.
The Vagus Nerve
The vagus nerve — the great wandering nerve — connects gut, heart, lungs, throat, and brain.
In safety, it supports calm regulation. The breath flows freely. Connection feels open.
But trauma — especially emotional or sexual violence — can block this flow.
Vagal shutdown keeps the body in immobility. Breath becomes almost invisible.
When root and sacral energy contract, this energetic block can rise toward the throat.
This is why many trauma survivors struggle to voice pain, emotions, and boundaries for years — until trauma healing begins. Chronic freeze paralyses them and keeps them silent.
Supporting vagus nerve regulation is a core part of nervous system healing.
The Fascia
Fascia is the body’s connective web. It responds to stress like a sponge.
This tissue is found throughout the entire body — from the top of your head to the tips of your toes.
It wraps around organs, muscles, bones, and nerves.
Under trauma, fascia tightens and thickens around wounded areas.
It can become a living archive of memory — creating subtle full-body armor.
When fascia hardens, the ribcage, abdomen, and diaphragm cannot expand freely.
Breath becomes restricted. Movement becomes guarded.
This thickened tissue can mute emotions and boundaries — until conscious healing invites release.
Trauma healing is not just the mind. It lives in these silent structures. In the breath.
In the body. Waiting to be freed.
In my healing practice, we work gently through breath, body awareness, and nervous system regulation — to release what words alone cannot.
If you would like to learn more about my trauma healing work, you are welcome to explore my practice.




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