The freeze response occupies a pivotal position in the depth-psychology and somatic trauma literature, functioning as the hinge between mobilizing defenses (fight and flight) and the more regressed immobilizing defense of feigned death or shutdown. The corpus reveals two principal lines of inquiry. The first, exemplified by Peter Levine and Pat Ogden, situates freezing within an evolutionary-ethological continuum: it is understood as 'alert immobility,' a sympathetically charged stilling that serves adaptive survival functions—concealment from predators, deception through apparent death, and preservation of energy for a future escape attempt. Ogden's sensorimotor framework carefully distinguishes the freeze response, with its tense musculature and hyperarousal, from the dorsal-vagal shutdown state, which is characterized instead by flaccid muscles and profound hypoarousal. Stephen Porges' polyvagal theory provides the neurophysiological substrate for this distinction, identifying ventrolateral PAG pathways and dorsal vagal complex as the neural architecture underlying immobilization. Ellert Nijenhuis and Bessel van der Kolk extend the analysis into dissociative phenomenology, arguing that chronic freezing underlies many somatoform dissociative symptoms. Lisa Feldman Barrett introduces a critical epistemological caution, warning against the conflation of freezing behavior with the emotion of fear. Across these authors, the freeze response is less a pathological failure than an adaptive default whose chronification constitutes the core somatic signature of unresolved trauma.
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The freeze response is characterized by high sympathetic nervous system arousal and hyper attentiveness, combined with a feeling of being unable to move. Tense muscles accompany this 'alert immobility,' and we might feel anxious, paralyzed, terrified, or agitated.
Ogden establishes the freeze response as a sympathetically driven, hyperaroused state of tense immobility, explicitly differentiated from the dorsal-vagal shutdown response that produces flaccid hypoarousal.
Ogden, Pat, Sensorimotor Psychotherapy Interventions for Trauma and, 2015thesis
In humans, freezing appears to involve a highly engaged sympathetic system in which the muscles become stiff and tense, heart rate is elevated, sensory acuity is increased, and the person becomes hyperalert.
Ogden characterizes human freezing as a state of peak sympathetic mobilization—alert immobility that is phenomenologically and physiologically distinct from both the orienting arrest and the dorsal-vagal collapse.
Ogden, Pat, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006thesis
the muscles become flaccid rather than tense and stiff as they do in freezing... 'muscles go limp, eyes look glazed, and heart rate slows down—just the opposite of what happens with the adrenaline burst of the freeze response'
Ogden clarifies the diagnostic contrast between the freeze response and floppy immobility by mapping them onto opposing poles of autonomic arousal—sympathetic hyperactivation versus dorsal-vagal collapse.
Ogden, Pat, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006thesis
No animal, not even the human, has conscious control over whether or not it freezes in response to threat. When an animal perceives that it is trapped and can't escape by running or fighting, freezing offers several advantages.
Levine grounds the freeze response in evolutionary necessity, arguing it is an involuntary, phylogenetically conserved survival strategy that becomes pathological only when it fails to discharge after the threat has passed.
Levine, Peter A., Waking the Tiger: Healing Trauma - The Innate Capacity to Transform Overwhelming Experiences, 1997thesis
No animal, not even the human, has conscious control over whether or not it freezes in response to threat. When an animal perceives that it is trapped and can't escape by running or fighting, freezing offers several advantages.
A parallel formulation to Levine's 1997 argument, reinforcing the involuntary and adaptive nature of freezing as an instinctual last-resort when fight and flight are foreclosed.
Levine, Peter A., Waking the Tiger: Healing Trauma—The Innate Capacity to Transform Overwhelming Experiences, 1997thesis
The neo-cortex is not powerful enough to override the instinctual defense response to threat and danger—the fight, flee, or freeze responses. In this respect, we humans are still inextricably bound to our animal heritage.
Levine situates the freeze response within a triune-brain framework, asserting that cortical override of instinctual discharge—not the freeze itself—is the proximate cause of chronic traumatization.
Levine, Peter A., Waking the Tiger: Healing Trauma - The Innate Capacity to Transform Overwhelming Experiences, 1997thesis
It is generally agreed that when faced with threat to life, both animals and humans assume a state of freeze, that is, the organism becomes completely muscularly immobile, with diminished awareness.
Rothschild identifies the freeze state as a universal threat-response across species and then moves to delineate two distinct categories of freeze, setting up a clinically important diagnostic taxonomy.
Rothschild, Babette, The body remembers Volume 2, Revolutionizing trauma, 2024thesis
a freeze state of sympathetic activation—tightened muscles temporarily paralyzing the individual from taking mental or physical action—or it may be filled with neural activation of one aspect of the vagus nerve—the dorsal, unmyelinated branch
Siegel integrates the freeze response into his window-of-tolerance model, identifying it as one of two distinct neurobiological pathways to immobilization outside the window—sympathetic freezing versus dorsal-vagal faint.
Siegel, Daniel J., The Developing Mind: How Relationships and the Brain Interact to Shape Who We Are, 2020supporting
The individual is forced to abandon active, mobilizing defenses (fight or flight) in favor of defenses that are immobilizing: freeze or 'feigned death.' Levine noted that 'the bodies of traumatized people portray snapshots of their unsuccessful attempts to defend themselves in the face of threat and injury'
Ogden, citing Herman and Levine, frames the freeze response as a defensive default adopted when mobilizing defenses fail, with somatic residues of that failed defense persisting as the hallmark of chronic trauma.
Ogden, Pat, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006supporting
the tension and pain of the freeze response were related to feeling unable to move in order to protect herself, saying that just thinking about her past trauma brought up the freezing.
Through case illustration, Ogden demonstrates how the somatic signature of the freeze response—muscular tension and immobility—is reactivated by trauma cues and can be therapeutically resolved through mindful embodied action.
Ogden, Pat, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006supporting
Freezing is a behavior, whereas fear is a much more complex mental state. The scientists who believe they study fear learning are categorizing a freezing behavior as 'Fear' and the underlying circuit for freezing as a fear circuit.
Barrett introduces a critical epistemological challenge to conventional fear-conditioning research, arguing that freezing is a measurable behavior whose conflation with the subjective emotion of fear constitutes a category error in neuroscience.
Barrett, Lisa Feldman, How Emotions Are Made: The Secret Life of the Brain, 2017thesis
several authors have observed a striking analogy between certain animal defensive responses and aspects of trauma-induced psychopathology in humans... Rivers (1920) stressed the survival value of freezing
Nijenhuis situates the freeze response within a century-long comparative tradition linking animal defensive behavior to human trauma psychopathology, emphasizing its evolutionary survival value and its recurrence as somatoform symptomatology.
Nijenhuis, Ellert, Somatoform Dissociation: Phenomena, Measurement, and Theoretical Issues, 2004supporting
the essential process underlying the instinct of immobility is the suppression of fear and pain. It is possible that the instinctive reaction to danger by means of immobility may have furnished one of the earliest motives for suppression.
Nijenhuis foregrounds the analgesia-producing function of immobility, arguing that the freeze response's suppression of fear and pain constitutes a phylogenetic precursor to psychological suppression and dissociation.
Nijenhuis, Ellert, Somatoform Dissociation: Phenomena, Measurement, and Theoretical Issues, 2004supporting
stimulation in the region of the PAG ventrolateral to the aqueduct (vlPAG) evokes a passive reaction of immobility, a decrease in blood pressure, and a slowing of heart rate... excitation of the vlPAG evokes an opioid-mediated analgesia
Porges identifies the neuroanatomical substrate of immobilization in the ventrolateral periaqueductal gray, linking it to dorsal vagal circuitry, opioid analgesia, and the polyvagal hierarchy of threat response.
Porges, Stephen W., The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation, 2011supporting
the increase in dorsal vagal tone has been observed even in newborns who become hypoxic... The hypoarousal of the submissive response leads to a subjective detachment from emotions as well as an evacuation, so to speak, of emotional experience
Ogden traces the developmental ontogeny of freeze and shutdown, noting the early emergence of dorsal vagal immobilization and its phenomenological correlates of depersonalization and emotional evacuation.
Ogden, Pat, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006supporting
When faced with possible or actual threat, the body goes into an arrest response: we hold our breath, we become completely still, all extraneous activities stop. We focus attention on our senses, particularly vision and hearing.
Heller describes the startle-arrest response as the somatic preamble to freeze, grounding it in a three-option threat-appraisal sequence—fight, flight, or freeze—that emerges from sensory orienting toward danger.
Laurence Heller, Ph D, Healing Developmental Trauma How Early Trauma Affectssupporting
Freezing or feigning death would be more successful than crying for help, fighting, or fleeing in situations when the abuser could easily overpower us if we tried to fight, catch us if we tried to run
Ogden articulates the context-dependent adaptiveness of freezing within the animal defense hierarchy, positioning it as the optimal response when other mobilizing defenses are foreclosed by circumstances of power disparity.
Ogden, Pat, Sensorimotor Psychotherapy Interventions for Trauma and, 2015supporting
We freeze or dissociate. We're not in our bodies. We're gone. We're frozen in our limbic mind and have no access to our thinking mind.
Dayton captures the phenomenological and cognitive consequences of the freeze response in relational trauma—the simultaneous loss of embodied presence and cortical access that accompanies limbic freezing.
Dayton, Tian, Emotional Sobriety: From Relationship Trauma to Resilience and Lasting Fulfillment, 2007supporting
The ANS evolved in the context of security and threat... highlighting its role in behaviors like mother-infant bonding... offering a unified perspective on the mind-brain-body connection and its role in promoting either social bonding or defensive responses.
Haeyen's polyvagal framework contextualizes the freeze response within the broader ANS hierarchy, noting that defensive immobility occupies the lowest rung of a system primarily organized around social engagement and co-regulation.
Haeyen, Suzanne, A theoretical exploration of polyvagal theory in creative arts and psychomotor therapies for emotion regulation in stress and trauma, 2024aside
Clayton's index reference places the freeze response within a four-part survival-response taxonomy alongside fight, flight, and fawn, marking it as a standard orienting concept in trauma-informed fawning literature.
Clayton, Ingrid, Fawning: Why the Need to Please Makes Us Lose Ourselves--and How to Find Our Way Back, 2025aside