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The Freeze Response 

by | Mar 2, 2026 | Trauma & Recovery

Artistic representation on the nervous system

The Freeze Response: What It Is, Why It Happens

When people think about how their body responds to danger, fight or flight usually comes to mind. But there is a third response that is far less understood and far more common than most people realise: the freeze response.
Freezing is not a failure to act, but rather, a deeply wired survival mechanism. For many people, especially those with a history of trauma, it is not confined to moments of acute danger. It follows them into daily ordinary life, shaping how they respond to conflict, stress, intimacy, and even simple decisions.

WHAT THE FREEZE RESPONSE ACTUALLY IS

The freeze response is guided by the oldest branch of the autonomic nervous system. According to Stephen Porges’s Polyvagal Theory (2001), the autonomic nervous system operates in a hierarchy shaped by evolution:

1. Social engagement (ventral vagal) is the newest system. It allows mammals to calm themselves through connection: eye contact, tone of voice, facial expression. When this system is active, a person feels safe enough to engage with others.

2. Fight or flight (sympathetic) is the mobilisation system. When threat is detected and the social engagement system cannot resolve it, the body prepares to act, either by confronting the threat or escaping it.

3. Freeze or shutdown (dorsal vagal) is the oldest system. When threat is overwhelming and neither fight nor flight is possible, the body shuts down. Heart rate drops. Muscles go limp or rigid. The mind may go blank or feel detached. This is the freeze response.

This is not a conscious choice. It is an automatic, involuntary shift into a state of immobilisation a survival strategy that evolved when escape was not an option.

WHY THE BODY FREEZES

In the animal world, freezing serves clear purposes: a prey animal that goes still may avoid detection by a predator, or may reduce the severity of an attack. The associated analgesia (numbness to pain) protects the organism during moments of inescapable threat. In humans, the same mechanism activates during overwhelming experiences,particularly those involving interpersonal threat. Research by Nijenhuis, van der Hart, and Steele (2004) found that the human defensive system mirrors the animal model closely, progressing through stages as threat increases:

– Apprehension (hypervigilance, scanning for danger)

– Flight (urge to escape) – Freeze (immobility, analgesia, reduced awareness)

– Fight (active resistance)

– Total submission (collapse, anesthesia, dissociation)

– Recuperation (return of sensation, pain, need for rest)

None of this happens by choice. These are automatic, sequential responses determined by the nervous system’s assessment of how close and how escapable the threat is. When a person freezes, their nervous system has determined (below the level of conscious thought) that mobilisation is not possible. This is why many trauma survivors feel shame about having frozen during an assault, an accident, or an abusive encounter. They ask themselves: “Why didn’t I fight back? Why didn’t I run?” The answer is that their nervous system made a survival calculation faster than conscious thought could ever intervene!

Read Part 2: How the Freeze Response Shows Up in Everyday Life →

About the Author

Valentina Chichiniova, MA, RCC is a Registered Clinical Counsellor and EMDR Consultant and DBR Therapist at Emergence Counselling & Wellness Inc.  She provides specialized trauma recovery and nervous system regulation. With an approach rooted in neurobiology, Valentina helps clients move beyond symptom management toward profound, lasting healing.