The Body Keeps the Score: How Trauma Lives in the Body and How to Reach It

Sarah came to therapy after years of anxiety she could not explain. Nothing dramatic had happened recently. She had processed her childhood abuse in previous therapy, talked about it extensively, understood it intellectually. Yet her body still tensed at certain voices. Her stomach locked when her boss used a particular tone. She startled at sounds others did not notice. She had, in her own words, "done the work" — and yet her nervous system had not received the memo.

Her experience is not unusual. It reflects something that trauma researchers have spent the past three decades trying to articulate: that trauma is not primarily a disorder of memory or cognition. It is a disorder of the body's survival system — and healing requires reaching the body directly.

Why Trauma Lives Below the Neck

In 1994, psychiatrist Bessel van der Kolk and his colleagues at Massachusetts General Hospital conducted a landmark neuroimaging study of trauma survivors. During trauma recall, they observed something unexpected: Broca's area — the region of the brain responsible for translating experience into language — went dark. Simultaneously, the right hemisphere, associated with imagery, emotion, and physical sensation, lit up intensely.

This finding, published in the American Journal of Psychiatry in 1996, provided a neurobiological explanation for what trauma therapists had long observed clinically: traumatised people often cannot put their experience into words. Not because they are withholding, but because under threat and during trauma recall, the language centre of the brain literally deactivates. The experience is encoded in sensation, image, and emotion — not in narrative.

Van der Kolk's 2014 book The Body Keeps the Score, which synthesised decades of research, articulated the implication: if trauma is encoded below the level of language, then purely verbal therapies — "just talking about it" — may not be sufficient to resolve it. Sometimes talking actually retraumatises, because it activates the original terror without providing a way through it.

The Incomplete Defensive Response

Peter Levine, a biophysicist and psychologist, developed Somatic Experiencing (SE) in the 1970s and 1980s, drawing on ethology — the study of animal behaviour. Levine observed that animals in the wild routinely face life-threatening situations and do not develop chronic stress disorders. A gazelle chased by a cheetah, if it escapes, will literally shake, tremble, and complete the discharge of the mobilised survival energy before returning to grazing. The organism completes its defensive response.

Humans often cannot complete this process. Social conditioning, the presence of others, the need to hold it together, or the sheer overwhelm of the threat means that the survival response — the enormous energy mobilised for fighting, fleeing, or freezing — gets stopped mid-process. The charge is not discharged. It remains stored in the nervous system and the musculature, re-activating whenever something reminds the body of the original threat.

In Levine's model, trauma is not what happened to you — it is what happened inside you as a result, and specifically, it is the incomplete defensive response that remains trapped in the body. Healing involves helping the body safely complete what it could not complete at the time of the original overwhelming experience.

The Nervous System Model: Window of Tolerance

Daniel Siegel's "window of tolerance" concept, developed in the late 1990s and now central to trauma-informed practice, describes an optimal zone of nervous system arousal within which a person can function, process experience, and engage with therapy. Above this window is hyperarousal — panic, flashback, fight or flight, intrusion. Below it is hypoarousal — numbness, shutdown, dissociation, collapse.

Both states make effective therapy difficult or impossible. Hyperarousal means the threat system is fully activated; the person is not in a position to reflect, integrate, or heal — they are surviving. Hypoarousal means the system has shut down to protect itself; there is insufficient activation to process anything.

Effective trauma therapy must work within the window of tolerance — keeping activation high enough to access the traumatic material, but regulated enough to process rather than simply relive it. Body-based approaches are specifically designed to modulate nervous system arousal, moving people into and maintaining them within this zone.

Somatic Experiencing: Titration and Pendulation

Somatic Experiencing uses two core principles to work with traumatic material without overwhelming the nervous system.

Titration means approaching traumatic material in small doses — touching the edge of the activation, then withdrawing, allowing the nervous system to integrate a small amount of charge before approaching again. Levine describes it as the difference between putting a hand near a flame versus plunging it into the fire. The goal is not immersion but gradual, manageable contact.

Pendulation describes the rhythm of moving between activation (contact with the traumatic material) and settling (return to a regulated, resourced state). The nervous system is not meant to remain in a state of activation; it needs to move between charge and discharge, tension and release. Pendulation teaches the body that it can approach difficult material and return to safety — which is itself a corrective experience for a system that learned that activation means permanent danger.

SE practitioners track the body closely — noticing micro-changes in breath, muscle tone, skin colour, eye movement, and posture that signal shifts in nervous system state. The work is slow, often subtle, and focused on sensation rather than narrative. Clients are not asked to tell the story; they are asked to notice what happens in the body when certain themes are touched.

Research support for SE is growing. A 2017 randomised controlled trial published in European Journal of Psychotraumatology found significant reductions in PTSD symptoms following SE treatment, with effects maintained at follow-up. A 2024 meta-analysis confirmed SE as an efficacious treatment for trauma-related symptoms.

Sensorimotor Psychotherapy

Pat Ogden developed Sensorimotor Psychotherapy (SP) in the 1980s as an integration of somatic therapy, attachment theory, and cognitive approaches. SP emphasises the body's action tendencies — the instinctual movements that were thwarted or incomplete during trauma. A person who was held down during an assault may have a thwarted impulse to push away or run. A child who was not protected may have a thwarted impulse to reach toward a caregiver.

In SP, therapists help clients notice and complete these action tendencies — not through re-enactment or catharsis, but through mindful, titrated movement. The completion of the thwarted action has a profoundly regulating effect on the nervous system. It literally tells the body: the threat is over; we survived; we can complete our response now.

SP is particularly well-suited to complex trauma and early developmental trauma, where the attachment system itself is implicated and where the body holds relational as well as survival responses.

EMDR: Bridging Body and Brain

Eye Movement Desensitization and Reprocessing (EMDR), developed by Francine Shapiro in 1987 and now one of the most extensively researched trauma treatments, occupies an interesting middle ground. It uses bilateral stimulation — typically guided eye movements, but also tapping or auditory tones — to facilitate the reprocessing of traumatic memories.

The mechanism is not fully understood, but the leading hypothesis draws on the adaptive information processing model: bilateral stimulation mimics the brain's natural consolidation processes (similar to REM sleep) and allows traumatic memories, which are stored in a "frozen" or unprocessed state, to be integrated with adaptive memory networks. When integrated, the memory loses its affective charge — it becomes something that happened, rather than something that is happening.

EMDR does not require the person to speak extensively about their trauma. In this sense, it bypasses the Broca's area shutdown problem. The person holds the traumatic memory in mind while the bilateral stimulation provides a form of dual attention — enough grounding in the present to prevent full dissociation into the past, while enough activation to access the material.

EMDR has the most extensive research base of any somatic-adjacent trauma treatment. The World Health Organisation, the American Psychological Association, and the UK's NICE guidelines all recommend it as a first-line treatment for PTSD.

Why "Just Talking About It" Sometimes Retraumatises

This is a crucial clinical point, and one that requires careful nuance. Talking therapies — including CBT, psychodynamic therapy, and narrative therapies — have significant evidence bases and help many people profoundly. The claim here is not that talking does not work, but rather that for some people, particularly those with complex or developmental trauma, purely verbal approaches can be insufficient or can inadvertently activate the threat system without providing resolution.

When someone with unresolved trauma is asked to narrate their traumatic experience in detail, the brain's threat system activates as though the event is happening again. If the therapist does not attend carefully to regulation — to the client's physiological state, to keeping them within the window of tolerance — the activation can become overwhelming, flooding the system and reinforcing the neural encoding of the traumatic memory rather than reprocessing it.

This is not an argument against verbal therapy. It is an argument for trauma-informed therapy that integrates attention to the body, to nervous system regulation, and to the pace of approaching traumatic material.

Physical Symptoms as Trauma Language

The Adverse Childhood Experiences (ACE) study, conducted by Vincent Felitti and colleagues at Kaiser Permanente (published 1998), found striking dose-response relationships between the number of adverse childhood experiences and a wide range of adult physical health outcomes: cardiovascular disease, cancer, autoimmune disorders, chronic pain, irritable bowel syndrome, and many others.

The mechanism connecting early trauma to physical health is multi-layered. Chronic activation of the stress response (cortisol, inflammation, immune dysregulation) creates physiological wear. Dissociation from body sensation removes the early warning signals that would otherwise prompt health-protective behaviour. And unresolved traumatic activation in the nervous system can manifest directly as chronic muscle tension, altered breathing patterns, and dysregulation of the autonomic nervous system — which governs every organ system in the body.

Chronic back pain, fibromyalgia, chronic pelvic pain, and functional gastrointestinal disorders are among the conditions most consistently associated with trauma history. This does not mean these conditions are "not real" or "all in the head" — they are genuine physical presentations. It means that effective treatment may need to address the trauma alongside the symptom.

A Note on Safety and Professional Care

Body-based trauma work is not self-help. The approaches described in this article — Somatic Experiencing, Sensorimotor Psychotherapy, EMDR — are clinical modalities requiring trained practitioners. Attempting to process traumatic material without professional support can be destabilising, particularly for those with complex or dissociative presentations.

If you recognise yourself in this article, the most important step is to find a trauma-informed therapist with training in somatic approaches. The platform's specialist directory includes practitioners with relevant training who can provide culturally appropriate support.

Stabilisation and resourcing come before processing. Before any trauma work begins, a competent therapist will focus on building your capacity for self-regulation — establishing a sense of safety in the body, developing internal resources, and expanding your window of tolerance. This foundation makes subsequent trauma processing both safer and more effective.

Medical note: This article is for informational and educational purposes only. It does not constitute clinical advice or a treatment recommendation. Trauma work carries risks and should be undertaken only with the support of a qualified, trauma-trained mental health professional. If you are in acute distress, please contact a crisis service.

Key Takeaways

• Trauma is encoded in the body — in nervous system activation, muscular tension, and physiological patterns — not only in memory or narrative. This is why verbal approaches alone are sometimes insufficient.
• Neuroimaging research shows that during trauma recall, Broca's area (language) deactivates while the emotional and sensory brain activates — creating the characteristic inability to put trauma into words.
• Somatic Experiencing (Levine) addresses incomplete defensive responses; Sensorimotor Psychotherapy (Ogden) works with thwarted action tendencies; EMDR (Shapiro) uses bilateral stimulation to reprocess frozen memories.
• The window of tolerance (Siegel) is the key clinical framework: effective trauma work keeps the person activated enough to access material but regulated enough to process, not just relive, it.
• Physical symptoms — chronic pain, fatigue, gastrointestinal distress — can be somatic expressions of unresolved trauma. Effective treatment may need to address both.