Trapped in time: How trauma freezes the body and nervous system

What if trauma is not just a psychological wound, but a persistent biological state? Discover how neuroscience and Polyvagal Theory are changing how we treat trauma.

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In psychoanalytic tradition, psychotrauma is generally defined as an event whose intensity exceeds an individual’s psychological capacity to process it. Freud viewed trauma as a breach of the psychic apparatus, overwhelming standard defense mechanisms and preventing an adequate symbolization of the experience. This definition focuses primarily on the individual’s inability to mentally process an event whose emotional charge surpasses their adaptive resources.

While this concept remains relevant today, it appears insufficient in light of recent advances in neuroscience, ethology, and trauma-informed psychotherapies. Indeed, a paradigm shift is gradually taking hold: psychotrauma can no longer be viewed solely as a psychological phenomenon; it must also be understood as an enduring physiological state rooted in the organism’s fundamental survival mechanisms.

This article explores this conceptual evolution, demonstrating how contemporary approaches invite us to view trauma as a disruption of neurophysiological defense systems, with psychological symptoms serving merely as secondary manifestations.

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The biology of freezing: when the body stays on high alert

This perspective essentially reverses the traditional analytical hierarchy. Trauma does not begin in the mind—it begins in the body. The organism reacts first on a sensorimotor level long before a conscious representation of the event can be constructed. Emotions themselves emerge secondarily as reflections of these bodily shifts. This idea finds early roots in the theory of William James (1884), who famously suggested that we do not cry because we are sad; rather, we feel sadness because we cry. Damasio (1999) later expanded on this intuition, demonstrating that feelings arise from the conscious perception of bodily states generated by emotions.

From this vantage point, many cognitive patterns characteristic of post-traumatic states ruminations, constant self-criticism, and negative self-beliefs (“I am helpless,” “I will never manage,” “I am worthless”) may not represent the core of the disorder, but rather the secondary consequences of a deeper neurophysiological state. These cognitions serve a defensive function: they help maintain the traumatic organization by rationalizing a persistent bodily state of threat. Put simply, the mind constructs a logical narrative to explain a body trapped in a survival response.

This hypothesis leads us to examine a concept central to contemporary trauma frameworks: the freeze response. What does this state actually entail?

Research in ethology offers a particularly clarifying illustration. Peter Levine (2010), drawing from animal behavior observations, describes a mouse captured by a cat. When faced with lethal danger, two primary defense strategies normally emerge: fight or flight. However, when both options become impossible, the organism activates a third, more archaic strategy: immobilization. The animal halts all movement, enters hypervigilance, and sometimes feigns death (tonic immobility). This reaction holds significant adaptive value, as many predators lose interest in immobile prey.

In humans, this exact neurobiological mechanism can be triggered during a traumatic event. However, unlike animals, which typically resume normal functioning once the threat has passed, some individuals remain trapped in this defensive mode. The objective danger lies in the past, yet the organism continues to react as though it were still present. The “cat” has left, but the nervous system goes on living as if it were still there.

This concept allows us to reframe the clinical understanding of psychotrauma. The individual is not merely reliving a memory; their organism itself remains frozen in the timeline of the event. The body continues responding to the present using reactions anchored in the past. Consequently, trauma appears less like a flaw in memory and more like a disruption in biological temporality.

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From dissociation to the vagus nerve: bridging classic psychiatry and neuroscience

This framework aligns remarkably well with the foundational work of Pierre Janet (1889, 1907). For Janet, a traumatic event only becomes a true memory when it can be integrated into the individual’s broader personality. Integration involves embedding the experience within autobiographical memory, giving it a place within the person’s history, and recalling it as an event anchored in the past. Conversely, when this psychological synthesis fails, the experience remains dissociated: it continues to manifest through automatic actions, overwhelming emotions, bodily sensations, or behavioral reactions outside conscious control. Dissociation thus stands as the central mechanism of psychotrauma in Janet’s work.

Long relegated to the background, Janet’s contributions are experiencing a major revival. Contemporary research in affective neuroscience and trauma psychotherapy increasingly validates many of his clinical intuitions. The work of Van der Kolk (2014), Van der Hart, Nijenhuis, and Steele (2006), Levine (2010), and Ogden, Minton, and Pain (2006) converges on a shared insight: trauma is imprinted primarily within the body’s regulatory systems long before it forms a conscious narrative. This convergence is particularly striking in neuroimaging data, which reveal relative hypoactivity in prefrontal regions paired with hyperactivity in brain structures dedicated to threat detection and automatic defense responses (Van der Kolk, 2014).

Within this theoretical landscape, the Polyvagal Theory proposed by Stephen Porges (2011) occupies a unique position. Although certain aspects remain debated within the scientific community, it offers a remarkably fruitful neurophysiological model for understanding the states of mobilization and immobilization observed in trauma.

Based on his observations of autonomic regulation, Porges challenged the classical view of a unitary parasympathetic system. He proposed two distinct vagal circuits with different adaptive functions. The ventral vagal complex, phylogenetically newer, fosters social engagement, communication, facial expressions, vocal prosody, and the capacity to seek safety through connection. Conversely, the older dorsal vagal complex activates when fight or flight becomes impossible. It triggers states of immobilization, submission, collapse, or feigned death, allowing the organism to minimize harm when no other survival strategy remains viable.

This distinction provides a compelling framework for interpreting clinical presentations in psychotrauma: stupor, emotional numbness, depersonalization, extreme fatigue, behavioral inhibition, or feeling “absent from oneself” can all be understood as varying expressions of a nervous system trapped in a defensive state of immobilization.

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Restoring safety and social connection in therapy

This insight fundamentally reshapes therapeutic goals. If trauma is primarily a neurophysiological state, healing cannot rely exclusively on verbal processing of the memory. Narrative processing remains necessary, but it is rarely sufficient. Therapeutic work must also focus on progressively restoring the organism’s ability to shift out of defensive states and rediscover a sense of bodily safety.

In this light, the therapeutic relationship takes on a crucial role. Social engagement, as described by Porges, serves as a primary lever for regulating the autonomic nervous system. The therapist’s presence, relational safety, tone of voice, facial expressions, interactional rhythm, and the gradual cultivation of somatic awareness become key elements in facilitating an exit from the freeze state and integrating the traumatic experience into the individual’s life story. Trauma therapy thus emerges not merely as work on memories, but as a process of restoring the organism’s capacity to fully inhabit the present moment.

This perspective does not replace classical psychodynamic frameworks; it enriches them by grounding the psyche in its biological roots. The body is no longer viewed solely as the arena where psychological conflicts play out—it becomes the primary repository of traumatic experience and the indispensable starting point for its resolution.

Ultimately, advances in trauma science are moving us past an exclusively psychological model toward viewing trauma as an enduring neurophysiological state of survival. The work of Pierre Janet, re-evaluated alongside contemporary neuroscience and the contributions of Levine, Van der Kolk, Ogden, and Porges, points to a clear realization: trauma stems not just from a past event, but from the persistence of un-deactivated defense responses.

This perspective invites us to treat cognitive and emotional symptoms as secondary outcomes of a body trapped in traumatic time. It opens new therapeutic avenues focused on restoring physiological safety, social connection, and sensorimotor integration while maintaining the value of psychological processing and narrative construction. Psychotrauma thus reveals itself as a multifaceted phenomenon bodily, psychological, and relational requiring an integrative approach that bridges neuroscience, clinical psychology, and psychotherapy.

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