Polyvagal Theory: A Science of Safety

Summary & key facts

This 2022 paper by Stephen Porges presents Polyvagal Theory as a way to study how feelings of safety come from the body's nervous system. It proposes that safety is not just a mood but has measurable brain–body signals. The paper explains neural pathways (like the ventral vagal complex and a process called neuroception) and physiological signs (for example respiratory sinus arrhythmia) that the author says link safety, social engagement, and bodily states, and suggests this view could guide changes in institutions to support health and social behavior.

Key facts:

• The paper (Porges, 2022) proposes that feelings of safety emerge from internal states regulated by the autonomic nervous system, rather than being only a subjective report.
• Polyvagal Theory, as described, identifies a ventral vagal complex and a “social engagement system” as neural circuits that can downregulate threat reactions and promote interpersonal accessibility.
• The paper uses the term neuroception for the nervous system’s detection of cues of safety or threat that can shift autonomic state.
• Respiratory sinus arrhythmia (RSA) is described as a measurable, periodic part of heart-rate variability tied to breathing and a valid index of cardiac vagal tone via ventral vagal pathways.
• According to the paper’s model, Level I (brainstem–organ communication that maintains physiological balance) is functional at birth in healthy full-term infants, but the amplitude of RSA is notably low in preterm infants.
• The author argues that recognizing and promoting feelings of safety (and opportunities for co-regulation) in places like healthcare and education could, if implemented, enhance health, sociality, productivity, creativity, and wellbeing; thi

Abstract

Contemporary strategies for health and wellbeing fail our biological needs by not acknowledging that feelings of safety emerge from internal physiological states regulated by the autonomic nervous system. The study of feelings of safety has been an elusive construct that has historically been dependent upon subjectivity. Acknowledging that feelings of safety have a measurable underlying neurophysiological substrate would shift investigations of feelings of safety from a subjective to an objective science. Polyvagal Theory provides an innovative scientific perspective to study feelings of safety that incorporates an understanding of neuroanatomy and neurophysiology. This perspective identifies neural circuits that downregulate neural regulation of threat reactions and functionally neutralize defensive strategies via neural circuits communicating cues of safety that enable feelings of safety to support interpersonal accessibility and homeostatic functions. Basically, when humans feel safe, their nervous systems support the homeostatic functions of health, growth, and restoration, while they simultaneously become accessible to others without feeling or expressing threat and vulnerability. Feelings of safety reflect a core fundamental process that has enabled humans to survive through the opportunistic features of trusting social engagements that have co-regulatory capacities to mitigate metabolically costly defense reactions. Through the study of neural development and phylogeny, we can extract foundational principles and their underlying mechanisms through which the autonomic nervous system leads to feelings of safety and opportunities to co-regulate. Several principles highlight the validity of a science of safety that when implemented in societal institutions, ranging from healthcare to education, would enhance health, sociality, and lead to greater productivity, creativity, and a sense of wellbeing. By respecting our need to feel safe as a biological imperative linked to survival, we respect our phylogenetic heritage and elevate sociality as a neuromodulator that functionally provides the scientific validation for a societal focus on promoting opportunities to experience feelings of safety and co-regulation.

Topics

Heart Rate Variability and Autonomic Control Neural and Behavioral Psychology Studies Psychosomatic Disorders and Their Treatments

Categories

Cardiology and Cardiovascular Medicine Health Sciences Medicine

Tags

Artificial intelligence Cognitive science Computer science Feeling Interpersonal communication Neuroscience Perspective (graphical) Psychology Social psychology