Immobilization/shutdown/dissociation/frozen, a trauma response built into the nervous system

Back in March 2012, I posted that I had started reading Peter A. Levine’s latest book, In An Unspoken Voice: How the Body Releases Trauma and Restores Goodness. My post included excerpts from Levine’s description of being hit by a car and his experience afterwards.

His experience serves as a useful model for being and staying present through trauma and recovery. He knew how to allow his body and emotions to process naturally so that he did not get stuck in a traumatic state (i.e., PTSD).

Well, I am still reading that book. It’s very, very rich. Some parts are rather scientific. I’m taking my time to really understand it.

Levine uses polyvagal theory (I just posted an interview with Stephen Porges, who came up with the theory) to explain the states that people experience and can get stuck in from traumatic experiences.

Because Somatic Experiencing Practitioners and other therapists (as well as astute loved ones) who are helping someone recovery from trauma need to know which layer of the nervous system is dominant at any given time in a traumatized individual, I am going to describe them.

First, the primary job of our nervous system is to protect us. We have senses that alert us to danger. We may react to a perception of a threat in our bodies before it ever becomes conscious in the mind. That’s because the autonomic nervous system (which is not under our control) is involved when trauma occurs. We react instinctually.

This is good to know. It means that your trauma reactions are automatic, not something you can control, so there’s no need to feel shame or blame yourself. You were doing the best you could.

There are two defensive states that occur when encountering trauma: immobility/dissociation/shutdown (freeze) and sympathetic hyperarousal (fight or flight).

I’m going to write about them in separate posts to avoid being too lengthy.

The more primitive nervous system state is immobility. (Primitive in that evolutionarily it comes from jawless and cartilaginous fish and precedes sympathetic hyperarousal.)

It is triggered when a person perceives that death is imminent, from an external or internal threat.

Levine also uses the terms dissociation, shutdown, and freeze/frozen to describe this state. Note: If you’re an NLPer, dissociation means the separation of components of subjective experience from one another, such as cutting off the emotional component of a memory and simply remembering the visual and/or auditory components. (Source: Encyclopedia of NLP)

Keep in mind that Levine is talking about dissociation as an involuntary post-traumatic physiological state that trauma victims can sometimes get stuck with. There may be some overlap. According to Levine, symptoms of being in this state include frequent spaciness, unreality, depersonalization, and/or various somatic and health complaints, including gastrointestinal problems, migraines, some forms of asthma, persistent pain, chronic fatigue, and general disengagement from life.

Levine notes:

This last-ditch immobilization system is meant to function acutely and only for brief periods. When chronically activated, humans become trapped in the gray limbo of nonexistence, where one is neither really living nor actually dying. The therapist’s first job in reaching such shut down clients is to help them mobilize their energy: to help them, first, to become aware of their physiological paralysis and shutdown in a way that normalizes it, and to shift toward (sympathetic) mobilization. 

The more primitive the operative system, the more power it has to take over the overall function of the organism. It does this by inhibiting the more recent and more refined neurological subsystems, effectively preventing them from functioning. In particular, the immobilization system all but completely suppresses the social engagement/attachment system.

Highly traumatized and chronically neglected or abused individuals are dominated by the immobilization/shutdown system.

Signs that someone is operating from this state include:

  • constricted pupils
  • fixed or spaced-out eyes
  • collapsed posture (slumped forward)
  • markedly reduced breathing
  • abrupt slowing and feebleness of the heart rate
  • skin color that is a pasty, sickly white or even gray in color

Brainwise, volunteers in the immobility state exhibited a decrease in activity of the insula and the cingulate cortex. In one study, about 30% of PTSD sufferers experienced immobility and 70% experienced hyperarousal, with a dramatic increase of activity in these brain areas. Most traumatized people exhibit some symptoms from both nervous systems, Levine says.

I feel the deepest compassion for people in this state, because I have experienced it myself: the spaciness, depersonalization, sense of unreality, and passive, disengaged attitude toward life. It was many years ago. If I could, I would reach back in time to that injured woman and give her resources she just didn’t have back then.

I feel so grateful for the trauma recovery work I’ve done, both with a therapist and on my own. I haven’t experienced immobilization for years, except briefly.

Next up: sympathetic hyperarousal/fight or flight.

8 thoughts on “Immobilization/shutdown/dissociation/frozen, a trauma response built into the nervous system

  1. Pingback: War and the Body – Serving the Survivors | Hands-of-Faith Holistic Healing Centers® Blog

  2. I can’t even make it through your whole article because I am so emotional about finally finding something that describes what I am going through. I have been searching and searching for so long and no one can ever help me. It has been up to me to help myself and I have been so close to giving up lately. I am nearly 33 years old and I “froze” at 2 and a half years old. I have photos to prove this but what I really need are some resources. Please, please get in touch with me. I can’t do this on my own anymore and you’re the first person I’ve found who truly understands.


    • Honey, I don’t know where you are, but the best resource I can think of for you in these circumstances is to find a Somatic Experiencing practitioner to work with. They are specially trained to understand what happens with the nervous system after a trauma, and they have some skills that can help you recover. This website can help you locate someone near you. Best of luck, dear.


  3. Good morrow Amanda & Mary~Ann,

    If possible in your area, try Tai Chi Chuan. Many MBIs(Mind~body Interventions) have been shown to reverse the molecular/cellular effects of stress/anxiety/PTSD.Breath is the bridge between body & mind.

    By engaging the Vegas nerve rather than sensory nerves our bodies can generate the capacity to cope more efficiently & “restore Goodness”.

    Njoy today, Jennie


  4. Thank you for this. Your words
    I started out with hyperarousal for over a few years. Crippling, quit my job, high school and life. Then developed a coping mechanism to help; immobilization/dissociation feeling and been dealing with that for the last 7 years. The first few years I welcomed it. Huge relief from the panic attacks. But within the last few years it’s been growing worse. Normal every day things have been getting harder and harder to remember and keep track of my life. My energy is limited and I have to chose one thing to do in a day or I crash. I have Started trauma healing for a few months now but it’s a slow process considering my memory is not well. It feels like my soul has left.
    You must tell me of your recovery story. It’s so refreshing and promising to hear you’ve come out from the fog.
    Thank you for this wonderful research,


    • Only someone with a soul could write this comment, Channy. ❤ Yes, it can be quite a struggle. Recovering from trauma is a process that unfolds daily. A lot of things helped: bodywork, psychotherapy, a circle of friends, dreamwork, journaling, ecstatic dance, yoga, improving my diet, gratitude, EFT, NLP, working on my strength and flexibility, meditation in many forms, books, podcasts, and more. I may never be completely recovered, unable to be triggered, as if the trauma never occurred. It's part of the path my life has taken. But every moment, every second, that I can be peaceful, grounded, and centered in my body-mind system means I am building resilience and health. Sending you all my best wishes for your healing.


  5. Pingback: Resources for understanding and healing Severe PTSD/C-PTSD – Cheryl Anne Ruebner: Astrology, Poetry, Performance, Healing, Theory, Thinking, Writing of all Sorts

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