Definition
Immobilization can involve freezing, faintness, energy conservation, protective stillness, dissociative shutdown, illness, medication effect, or exhaustion. These are physiologically and clinically distinct states.
Why it matters
Collapsing all low-activation states into “shutdown” risks missing important medical, psychiatric, or contextual causes.
The Science
Tonic immobility, faintness (vasovagal), sickness behavior, freeze responses, and depressive withdrawal share the surface feature of reduced action but differ in mechanism and treatment.
The NSI Perspective
NSI insists on differentiation. Low activation is a category, not a diagnosis.
Clinical Implications
Careful assessment matters. A person who cannot move may be freezing, ill, exhausted, or grieving — and each requires different care.
Practical Application
If your body has slowed to a stop, resist the urge to label it immediately. Ask what kind of stop it is. Sometimes the answer is medical.
References
- 1.Kozlowska K, et al. Fear and the defense cascade: clinical implications and management. Harv Rev Psychiatry. 2015;23(4):263–287.