The Fear Paralysis Reflex (FPR): The Primordial Freeze Response
© 2025 J. Moffitt. Registered U.S. Copyright Office. Polyvagal Acupuncture® The Fear Paralysis Reflex (FPR) is the earliest-appearing defensive reflex in fetal development, emerging as early as 5–8 weeks of gestation. It precedes all motoric fight-or-flight responses and represents the organism’s first organized reaction to threat: tonic immobility. This freeze state is characterized by stillness, bradycardia, breath-holding, and Read More




