What is Polyvagal Theory? A plain-English guide for therapy clients (Calgary)

Polyvagal Theory is a framework for understanding the autonomic nervous system as a hierarchy of states that shape everything from emotional reactivity to social connection to chronic illness. Polyvagal-informed therapy uses this framework to help clients recognize what state they are in, expand their capacity to be in a regulated state, and use specific practices to shift between states. The theory was developed by Stephen Porges.

Where Polyvagal Theory came from

Stephen Porges, a neuroscientist and psychologist, developed Polyvagal Theory in the 1990s. The theory mapped the role of the vagus nerve (the largest nerve in the autonomic nervous system) in social engagement, threat response, and bodily regulation. It reframed many features of trauma, anxiety, and chronic illness as nervous system states rather than purely cognitive issues.

The three nervous system states

  1. Ventral vagal (regulated): social engagement, safety, connection, calm capacity, presence. The state where genuine therapy work, learning, and relationship can happen.
  2. Sympathetic (fight or flight): activation, anxiety, anger, urgency, vigilance. Useful in actual danger. Exhausting when chronic.
  3. Dorsal vagal (shutdown): collapse, numbing, dissociation, depression, withdrawal. The system's last-resort response when fight or flight has failed.

The nervous system shifts between these states based on perceived safety or threat. Polyvagal-informed therapy works to expand the time spent in ventral vagal, recognize shifts into sympathetic or dorsal earlier, and use specific practices to shift back.

Why this matters in therapy

If a client is in a chronic fight-or-flight or shutdown state, traditional talk therapy cannot land. The client's nervous system is not in a state where learning, insight, or change can be received. Polyvagal-informed work prioritizes building the regulated state first, then doing the deeper work from that foundation.

What polyvagal-informed therapy is used for

What polyvagal-informed sessions look like

Sessions often include nervous system mapping (helping the client recognize their own states), specific regulation practices (breathing, movement, social engagement, grounding), and slow careful work that respects the nervous system's pace. The therapeutic relationship itself becomes a regulating presence.

Evidence base

Polyvagal Theory is widely integrated into trauma therapy, somatic approaches, and attachment work. While some aspects of the original theory are debated in the neuroscience literature, the clinical framework has accumulated significant practitioner support and is foundational in modern trauma treatment.

Common misconceptions about Polyvagal Theory

Polyvagal work is not a standalone therapy model. It is a framework that integrates with other approaches (EMDR, IFS, attachment-based therapy, somatic experiencing). Polyvagal work is not just about "calming down." It is about expanding the range of nervous system states the client can flexibly move through.

When polyvagal-informed work is the right fit

Polyvagal-informed therapy fits particularly well when:

Polyvagal-informed therapy at Curio Counselling Calgary

Several Curio Counselling Calgary clinicians integrate polyvagal-informed work throughout their practice. The approach pairs naturally with EMDR, IFS, attachment-based therapy, and trauma work. Free 20-minute consultations help clarify whether polyvagal-informed work fits your situation.

Curio Counselling Calgary is at 1414 8 St SW Suite 200, Calgary, AB T2R 1J6, in the Beltline. Phone 403-243-0303. In-person and virtual sessions across Alberta.