What is Co-Regulation?
Co-regulation is “the neural process that enables individuals to coordinate their physiological and behavioural states with others” (Porges, 2011). It refers to the way two or more people mutually influence each other’s physiological and emotional states through nonverbal cues, vocal tone, facial expressions, and body language. Unlike self-regulation—the capacity to modulate one’s own nervous system through internal strategies—co-regulation emphasizes that mutual help and cooperation are dependent on a nervous system that has the capacity to downregulate threat reactions to allow the proximity necessary for cooperative behaviors and co-regulation.
This is not merely a psychological construct but a measurable biological phenomenon. Co-regulation creates a physiological platform of safety that supports a psychological story of security that then leads to social engagement. The autonomic nervous systems of two individuals find sanctuary in a co-created experience of connection. Functionally, co-regulation operates through the ventral vagal branch of the autonomic nervous system—the pathway responsible for social engagement, calm states, and the inhibition of defensive responses.
Origins & Lineage
Polyvagal theory was developed in 1994 by Porges, who at the time was director of the Brain-Body Center at the University of Illinois at Chicago. Stephen W. Porges introduced the concept of co-regulation as one of three organizing principles within Polyvagal Theory, alongside neuroception (unconscious threat detection) and hierarchy (the layered structure of autonomic states). According to Polyvagal Theory, three organizing principles — neuroception, hierarchy, and co-regulation — form the foundation of understanding how our nervous system works.
While Polyvagal Theory formalized co-regulation as a neuroscientific construct in the mid-1990s, its roots extend into earlier attachment research. Attachment theory, articulated by Bowlby and operationalized by Ainsworth, posits that repeated caregiver–infant transactions organize neural and behavioral systems for proximity-seeking, safety, exploration, and affective co-regulation. Developmental psychologist Allan Schore has argued that attachment theory itself can be understood as regulation theory, given the primacy of nervous system co-regulation in caregiver-child bonding.
Clinical application of co-regulation was significantly advanced by Deb Dana, LCSW, who translated Porges’s academic framework into accessible therapeutic language through her writings on the “autonomic ladder” and Polyvagal-informed clinical practice beginning in the late 2010s. However, PVT is popular among some clinical practitioners and patients. However, multiple aspects of the theory are widely criticized for being at odds with known science. Neuroanatomists have raised concerns about specific anatomical claims underpinning Polyvagal Theory, though the applied concept of co-regulation remains influential in trauma therapy, somatic practices, and relational work.
How It’s Practiced
Co-regulation begins with the shared experience between a developing baby and its mother. Before birth, the baby hears its mother’s voice, which becomes a sound of safety. As an infant, it pairs the voice with a parent’s smiling face, and later as a toddler can look to them to find regulation (after falling down, for example). This developmental template persists throughout life.
In therapeutic contexts, co-regulation is when a clinician practices an intentionally calming and supportive approach with a patient to help them regulate their nervous system activation. This approach utilizes the clinician’s own regulated nervous system to help the other person feel safe, heard, and calm. The clinician monitors their own autonomic state—maintaining ventral vagal tone—to offer a physiological anchor for clients in sympathetic arousal (fight-or-flight) or dorsal shutdown (freeze/collapse).
Concrete practices include: maintaining a steady vocal prosody; employing slow, deliberate breathing that clients can unconsciously mirror; offering open facial expressions; and physically positioning oneself at eye level. When we encounter someone whose voice is warm and whose facial expressions are open, our ventral vagal system “tunes in,” signaling safety and inviting connection. Partners and caregivers employ co-regulation through synchronized breathing, eye contact, gentle touch, active listening without attempting to “fix,” and shared rhythmic activities such as walking or rocking.
Co-Regulation Today
Co-regulation has become foundational language in trauma-informed care, somatic therapy modalities (including Somatic Experiencing and sensorimotor psychotherapy), attachment-based therapies (such as Emotionally Focused Therapy), and nervous system education for parents and educators. Lately, especially as many have struggled with the isolation of quarantine, the loss of loved ones to COVID-19, the trauma of systemic racism and police brutality, and the violent repression of protests, we are seeing many movement healers and caretakers lifting up the importance of “co-regulation,” a concept that was popularized through Stephen Porges’ research on Polyvagal Theory.
Clinical training programs now routinely teach co-regulation as a precondition for skill-building in therapy. If we try to introduce skills when a patient is too far outside their window of emotional or nervous system tolerance, they may struggle to engage in the learning, resist that skill, and even encode the experience in a negative way. Which makes sense, as when someone is in a state of fight-or-flight, their cognition has moved away from the areas of the brain that control the executive functioning that’s needed to learn new skills. Seekers encounter co-regulation practices in yoga classes emphasizing partner breathwork, mindfulness retreats incorporating dyadic exercises, group therapy settings, and parenting workshops grounded in attachment science.
Common Misconceptions
Co-regulation is not codependency. Unlike self-regulation, which focuses on managing emotions independently, co-regulation relies on positive social interactions to achieve emotional balance. Importantly, it differs from co-dependency, which involves an unhealthy reliance on others. Co-regulation fosters mutual, adaptive relationships built on trust and stability.
It is not a technique that eliminates the need for self-regulation capacity. “Co-regulation gets missed because we place a premium on self-regulation. But in reality, the more effective we are at co-regulating in our world, the more effective we are at self-regulating.” Both capacities are complementary.
Co-regulation does not require verbal processing or emotional disclosure. It operates primarily through subcortical, autonomic pathways before language. A dysregulated person may benefit more from silent shared breathing than from being asked to articulate feelings.
Finally, while Polyvagal Theory provides the dominant framework for understanding co-regulation, the anatomical and evolutionary claims underlying the theory remain contested within neuroscience. The clinical utility of co-regulation does not require acceptance of all aspects of Porges’s model.
How to Begin
Begin by cultivating awareness of your own autonomic state. Notice patterns: When do you feel settled versus activated? What sensory inputs (tone of voice, proximity, eye contact) shift your state?
Practice “lending” your nervous system. The best time to practice co-regulation isn’t during a crisis. It’s when things are relatively calm. Building a foundation of positive co-regulation makes it easier to navigate difficult moments together. Sit with a trusted person and synchronize your breathing for two minutes. Notice the shift.
For those interested in clinical application, Deb Dana’s The Polyvagal Theory in Therapy (2018) offers accessible exercises. Stephen Porges’s The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation (2011) provides the scientific foundation. For attachment-oriented readers, Allan Schore’s work on affect regulation bridges psychoanalysis and neuroscience, though it is dense. Many somatic therapists trained in Somatic Experiencing, Sensorimotor Psychotherapy, or Hakomi integrate co-regulation implicitly into bodywork.