Polyvagal Theory and Relationships: Understanding Your Automatic Reactions

Your partner raises their voice and you freeze, unable to respond. Or else, on the contrary, you explode within seconds. Or again, you leave the room without a word. These reactions aren't conscious choices: they're driven by your autonomic nervous system. Polyvagal theory, developed by Stephen Porges in 1994, revolutionizes our understanding of these automatic reactions in relationships.

The Three States of the Nervous System According to Porges

Polyvagal theory identifies three branches of the autonomic nervous system, activated hierarchically based on the level of perceived safety:

1. Ventral Vagal: Connection and Safety

When you feel safe, the ventral vagus nerve is active. You are:

• Calm and present
• Capable of listening and responding with empathy
• Open to eye contact and physical touch
• Able to regulate your emotions

This is the optimal state for relationships: the social engagement system.

2. Sympathetic: Fight or Flight

Faced with a perceived threat, the sympathetic system takes over. You shift into:

• Fight mode: anger, verbal aggression, criticism, accusations
• Flight mode: withdrawal, avoidance, changing the subject, leaving the room

Your heart races, muscles contract, breathing becomes shallow.

3. Dorsal Vagal: Immobilization

If the threat is perceived as insurmountable, the dorsal vagus nerve triggers an immobilization state:

• Freezing, disconnection, dissociation
• Sensation of emotional numbness
• "I'm here but I'm not here"
• Collapse, complete passivity

Polyvagal Theory in Couple Relationships

The Attachment System and the Vagus Nerve

Attachment styles map directly onto the polyvagal model:

• Secure attachment: easy access to ventral vagal, good regulation
• Anxious attachment: frequent sympathetic activation (hyperactivation)
• Avoidant attachment: oscillation between sympathetic (flight) and dorsal vagal (shutdown)
• Disorganized attachment: rapid switching between all three states

Co-regulation

Porges emphasizes a key concept: co-regulation. We don't regulate our nervous system alone — we do it in the presence of another nervous system. A calm partner can soothe your activated nervous system. Conversely, two nervous systems in fight mode create an explosive escalation.

Practical Exercises to Regulate Your Nervous System

Returning to Ventral Vagal

• Physiological breathing: inhale through your nose (4 seconds), exhale through your mouth (8 seconds). The long exhale directly activates the vagus nerve
• Soft eye contact: looking into your partner's eyes for 30 seconds activates the social engagement system
• Prosodic voice: speaking with melodic variations (warm tone, not monotone) signals safety
• Singing, humming: directly stimulates the vagus nerve
• Cold water on your face: activates the diving reflex, slows your heart rate

In Case of Crisis

If you're in sympathetic mode (anger, panic):

Name your state: "My nervous system is activated, I'm in fight/flight mode"

Ask for a pause: "I need 20 minutes to regulate myself"

Move: walk, stretch, shake your hands (discharge sympathetic energy)

Breathe with a lengthened exhale

Return when you feel your body calm down

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Conclusion

Polyvagal theory offers us a valuable framework for understanding our reactions in relationships. When we "lose it" or "shut down," it's not a character flaw: it's our nervous system responding to a perceived threat. Understanding this mechanism gives us the possibility of choosing a response rather than being subject to a reaction.

Gildas Garrec, CBT Psychotherapist

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