The Polyvagal Theory: How to Calm the Body
By Ashley Barnes, M.S. AMFT What is Polyvagal Theory? Polyvagal Theory explains the impact that our nervous system has on our experience of threat and safety. Shifts in our autonomic nervous system (which regulates involuntary physiological processes like heart rate, respiration, digestion, etc.) produces key states of being: rest-and-digest (safe), fight-or-flight (unsafe, mobilization), or shutdown (unsafe, freeze). The autonomic nervous system is composed of three divisions, two of which are the sympathetic and parasympathetic nervous systems. If we have unresolved trauma in our past, struggle with chronic stress, or experience anxiety and depression, we may live in a version of perpetual fight-or-flight. This is hard on the body and can lead to many adverse health outcomes, both physical and mental. What is the Vagus Nerve? Central to Polyvagal Theory is the vagus nerve, “is the longest cranial nerve in the body, containing both motor and sensory functions in both the …