The Polyvagal Theory: New Insights into Adaptive Reactions of the Autonomic Nervous System — A Plain-English Review
Porges, S. W. (2009) — Cleveland Clinic Journal of Medicine
In this 2009 paper, Stephen Porges provides a more accessible overview of Polyvagal Theory and explores how the autonomic nervous system may contribute to different ways of responding to safety, danger and life threat.
The paper develops some of the ideas from his earlier work and introduces concepts that have since become widely used within trauma-informed and body-based approaches.
Different responses for different situations
Polyvagal Theory proposes that our autonomic nervous system has more than one way of responding to the world around us.
Porges describes a proposed hierarchy of responses involving social engagement, mobilisation and immobilisation.
When conditions support safety, the theory proposes that physiological regulation can support social connection, communication and engagement.
When threat is detected, mobilisation may become more prominent, preparing the body for action. Under circumstances experienced as overwhelming or life-threatening, immobilisation responses may occur.
From a therapeutic perspective, this can provide a useful way of understanding why someone's experience can change considerably depending on their bodily state.
The idea of neuroception
An important concept discussed by Porges is neuroception.
He uses this term to describe a proposed process through which the nervous system evaluates features of safety, danger and life threat without requiring conscious awareness.
This can be a useful idea clinically because our conscious assessment of a situation and our bodily response to it do not always appear to agree.
Someone might intellectually know that they are safe while still experiencing tension, vigilance, an urge to escape or a tendency to withdraw.
Rather than assuming that these responses are irrational, we can become curious about what the body may be responding to.
Regulation through relationship
Another important aspect of the theory is its emphasis on social connection.
Porges proposes that facial expression, vocal tone, listening and other aspects of social interaction are connected with physiological regulation.
This helps provide a framework for thinking about co-regulation — the ways in which interactions with another person may influence our physiological and emotional state.
For me, this connects particularly well with attachment theory and Somatic Experiencing. Therapy isn't simply about an individual learning techniques to regulate themselves. The quality of the therapeutic relationship and the experience of sufficient safety within that relationship can also matter.
What I find useful clinically
One thing I value about this framework is that it encourages us to notice state rather than looking only at symptoms or behaviour.
A person who becomes highly activated, disconnected or withdrawn may be experiencing a protective response rather than deliberately choosing that behaviour.
This can open up a different kind of therapeutic curiosity.
Instead of immediately trying to change the response, we can notice what is happening, what preceded it, what the body appears to need and whether greater support or safety changes the experience.
Over time, the aim isn't necessarily to remain in one supposedly ideal state. It is to develop greater flexibility and capacity to move between states without becoming overwhelmed or stuck.
What are the limitations?
As with Porges' earlier paper, this is primarily a presentation and development of Polyvagal Theory, rather than a clinical trial testing whether therapy based on the theory is effective.
Some of the specific physiological and evolutionary explanations proposed by Polyvagal Theory remain scientifically contested.
This distinction matters.
There is good reason to be interested in the relationship between autonomic physiology, threat, safety, social interaction and emotional regulation. That does not automatically establish every biological mechanism proposed within Polyvagal Theory.
Later papers in this series look directly at these scientific criticisms and at more recent attempts to evaluate the theory in light of current research.
What I take from this paper
The aspect I find particularly useful is the invitation to consider behaviour within the context of nervous-system state, safety and relationship.
It encourages curiosity rather than judgement.
Someone's mobilisation, withdrawal or difficulty connecting may make more sense when understood as part of an adaptive protective response.
Used alongside Somatic Experiencing, attachment theory and other perspectives, this can offer a helpful framework for exploring what is happening in the present moment without reducing a person's experience to a single theory.
Reference
Porges, S. W. (2009). The Polyvagal Theory: New Insights into Adaptive Reactions of the Autonomic Nervous System. Cleveland Clinic Journal of Medicine, 76(Suppl 2), S86–S90.
Comments