Freeze Response
The nervous system's third survival response — beyond fight and flight — in which the body becomes immobilized in the face of an inescapable threat, and which underlies the dissociation, numbness, and collapse that characterize many trauma responses.
The freeze response is the autonomic nervous system's survival strategy for threats that cannot be escaped or fought — the dorsal vagal collapse state in which the body becomes immobile, numbed, and disconnected from active engagement with the world.
Where fight and flight are active survival responses mediated by the sympathetic nervous system, freeze is a passive response mediated by the dorsal vagal branch of the parasympathetic nervous system. It is the nervous system's last resort: when neither fighting nor fleeing is possible, the body shuts down.
How It Works
In Stephen Porges's polyvagal theory, the freeze response corresponds to the most phylogenetically primitive of the three autonomic states. It is the response of immobility and metabolic conservation seen throughout the animal kingdom — the possum playing dead, the deer locked in headlights.
In humans, the freeze response is activated by the neuroception of threat that cannot be escaped: the child who cannot leave the situation that is terrifying them, the person whose life feels under threat with no available action. The nervous system produces dissociation, depersonalization, slowed heart rate, reduced pain sensitivity, and the subjective experience of numbness or unreality.
How It Shows Up
The freeze response shows up in the moments when someone cannot speak, cannot move, cannot respond to what is happening. In the dissociative numbness that descends during overwhelming events. In the shutdown that follows overwhelming activation.
Chronically activated, it shows up as the persistent flatness and disconnection of depression, the inability to feel pleasure or motivation, the sense of being present in the body but not fully in life.
How It Heals
Healing the freeze response requires working slowly with the body's incomplete mobilization responses — the movement impulses that were suppressed — and building the capacity to complete the threat response cycle that was arrested. Somatic Experiencing, developed by Peter Levine, is specifically designed for this work.