Polyvagal Theory

The Polyvagal Theory is a model of the autonomic nervous system—that is, the part of the nervous system that controls heart rate, breathing, and stress responses without us having to think about it consciously. The American psychophysiologist Stephen Porges introduced it in 1994.

The model distinguishes three states. In the first, a person feels safe and is able to make contact, speak, and play. Porges attributes this state to a branch of the vagus nerve, which he calls the ventral vagus. The second state is fight or flight, controlled by the sympathetic nervous system, which puts the body on alert. The third state is freeze or withdrawal, which Porges attributes to the dorsal vagus.

A central concept is neuroception. By this, Porges means that the nervous system constantly and unconsciously scans the environment and assesses whether a situation is safe, threatening, or life-threatening. This assessment occurs faster than a child or adult could put it into words.

This often sounds familiar to parents. A child who feels safe talks, laughs, and lets themselves be comforted. When stress rises, the child becomes loud, fidgety, or angry, wants to run away, or lashes out. If the tension becomes too great, the child slips into a third state: they fall silent, seem absent, withdraw, or suddenly appear tired and distant.

The theory emphasizes that the nervous system of a calm adult can help the child calm down. It describes this process as co-regulation. A child first learns emotional regulation through the support of trusted caregivers. In trauma therapy, the model is used to explain intense stress and startle reactions, such as those seen in post-traumatic stress disorder. The vivid language of safety and connection resonates more deeply with many families than abstract technical terms.

Honesty is needed here. The model is widely used in practice and in self-help literature, but its neurophysiological basis is considered controversial among experts and has not been conclusively proven.

In 2023, physiologist Paul Grossman of the University Hospital of Basel explained in the journal *Biological Psychology* why he considers five core assumptions of the theory to be untenable or unlikely. Criticism has been directed, among other things, at the assumption that a specific heart rate measure reliably reflects what is known as “vagal tone,” and at the thesis that myelinated vagal fibers are unique to mammals. A broader review article involving numerous experts in vagus physiology and neuroanatomy reached a similar conclusion in 2026.

Porges disagrees. In a 2026 response to the criticism, he accuses his critics of attacking a distorted version of his theory and draws a clearer distinction between the physiological basis and the polyvagal perspective as a clinical approach. For parents, this means: The descriptive language about calm and stress helps some people in their daily lives. The specific claims about certain neural pathways in the brain are scientifically controversial and should not be understood as established facts.

The Polyvagal Theory can serve as a helpful metaphor for discussing tension and calm. It reminds us that a child is more likely to calm down if an adult remains calm themselves, and that the adult’s own state of mind matters. In this sense, it aligns well with approaches such as mindfulness and conscious self-care.

It’s important to maintain a level-headed perspective. The theory is not a diagnostic tool, nor is it a treatment method with proven efficacy. Caution is advised regarding programs that use the term in their marketing and promise a quick cure for trauma or stress. The current state of research does not support such claims of a cure.

• Use the model as a framework for describing states of being, not as proof of biological processes.
• Focus on safe, reliable routines and moments of calm rather than on individual techniques that make grand promises.
• Remain skeptical of expensive courses that claim their effectiveness has been scientifically proven.

If your child is under severe stress for an extended period of time, withdraws, frequently freezes up, or if you suspect they have had a traumatic experience, seek professional help. Your first point of contact should be your child’s pediatrician. A reliable assessment, diagnosis, and treatment can only be provided by a child and adolescent psychiatry (KJP) practice or by a medical or psychotherapeutic specialist.

Rückenwind “Eltern” is intended to provide coaching and support for parents. Janike is a social worker and parent coach currently training to become a child and adolescent psychotherapist; she is not licensed and does not make diagnoses. Our support is not a substitute for psychotherapy or a medical evaluation. If there is a specific suspicion of a mental health condition, you should consult the appropriate specialist.