A Preliminary Synthesis in Polyvagal Acupuncture® and Polyvagal Massage™
Dr. Jennifer Moffitt, DTCM, DNCCAOM, L.Ac. Certified Primitive Reflex Clinical Specialist (CPRCS)
This document is a preliminary clinical synthesis. It draws on established neuroscience, clinical observation, and integrative reasoning across multiple disciplines. The mechanistic reasoning is grounded in established neuroanatomy, autonomic physiology, mitochondrial bioenergetics, and developmental neuropsychology. The clinical frameworks, techniques, and synthesis presented in this series were developed over 25 years of clinical practice, years of post-graduate education and personal recovery. Practitioners are encouraged to evaluate it against their own clinical experience The opinions expressed here are mine. ©Polyvagal Acupuncture® and Dr.Jennifer Moffitt. This work is registered with the Library of Congress.
The physiological changes described throughout the preceding sections ultimately converge in the brain’s systems for emotion, attachment, and identity. Because these are the systems most closely associated with thoughts, feelings, and relationships, this is where psychotherapy has traditionally focused. In this model, however, they represent the downstream consequences of a much broader physiological process.
The limbic system is not a single structure but an integrated network through which the physiological changes described throughout the previous spokes become our lived experience of ourselves, other people, and the world. Here, one corrupted developmental blueprint produces many downstream expressions. Every spoke discussed thus far converges within this network, where physiology is translated into sense of self.
The limbic system gives emotional meaning to our experiences. It decides whether we perceive our surroundings as safe or dangerous. It develops alongside the autonomic nervous system (ANS), the vestibular system, connective tissue (sinew channels), the gut, and the immune system. (Schore, 2012). When these systems face prolonged physiological stress, as in chronic dysautonomia or developmental trauma, the limbic system recalibrates toward survival. (Heim et al., 2008). This recalibration produces a near constant sense of dread, difficulty regulating emotions, and defensive reactions that persist long after the original danger has passed. (van der Kolk, 2014).
Bessel van der Kolk’s work on Developmental Trauma Disorder (DTD) gives clinicians an important framework for understanding these issues. In The Body Keeps the Score (2014), he argued that trauma is not simply a story about the past. It is an ongoing physiological state that continues to shape the present body. (van der Kolk, 2014). The DSM has not yet included DTD, but his work has helped shift trauma research toward understanding altered nervous system development rather than isolated psychological symptoms.
The limbic system expresses this recalibration throughout its structures, but one principal survival structure coordinates it: the periaqueductal gray (PAG).
The Periaqueductal Gray and the Survival Response
The periaqueductal gray (PAG) is the brainstem’s primary survival command center. It sits at the junction of the midbrain, surrounding the cerebral aqueduct, and it does not distinguish between a present threat and an anticipated one.
In severe or prolonged stress states, the threshold for PAG activation drops. The PAG no longer needs a genuinely threatening event to trigger a fight, flight, or freeze response. It needs only a cue, such as a tone of voice or a facial expression, that the pattern matching system reads as threat adjacent. (Shore, , 2012). This circuit fires before the cortex processes the input, so the body enters a fight, flight, or freeze response before the person knows why. (Levine, 2010). Clinicians see the consequence of this often: patients who cannot stay regulated in ordinary situations.
Spoke 1 introduced this principle in general form, describing how survival adaptations shape perception itself. Here it becomes specific: the same low threshold that governs a person’s response to ordinary situations also governs their relationship to intimacy itself, a connection this section returns to below.
PAG sensitization does not only affect children, even though its effects often run deepest during development. Military veterans, first responders, healthcare workers who lived through the prolonged stress of the COVID-19 pandemic, survivors of violence, refugees, and others who face overwhelming or repeated trauma can all develop a persistently sensitized PAG. (McEwen, 2007; van der Kolk, 2014) Afterward, their nervous system needs far less input before the PAG triggers a fight, flight, or freeze response.
This same mechanism plays out today on a larger scale. Screens and constant exposure to outrage, whether on social media or in political rhetoric, feed the PAG the same threat cues that a hostile face or tone of voice would. Doomscrolling on platforms like Twitter works the same way, except it repeats hundreds of times a day. This daily exposure pushes many people much closer to a chronic, low-grade survival state, even without a single traumatic event. (Moffitt, 2025).
Why Understanding the Trauma Does Not Heal It
Kalsched, Winnicott, and Schore describe the same nervous system from three different angles. Kalsched calls it the self care system. Winnicott calls it the False Self. Schore calls it a right hemisphere built around survival instead of safety. Different words, same underlying pattern: a person whose regulatory system organized around threat instead of connection, early enough that the threat became the baseline. (Kalsched, 1996; Schore, 2012; Winnicott, 1965).
Taken together, these perspectives suggest that early relational experience does more than shape attachment. Through repeated experiences of attunement, mirroring, and co regulation, it becomes embodied as the individual’s baseline experience of self, others, and the world. The quality of early attachment becomes embodied as the nervous system’s baseline expectation of safety, connection, and existence itself. When this developmental process unfolds within a sufficiently safe environment, the child gradually develops the capacity simply to be. When it is disrupted, the nervous system organizes around defense rather than presence. Winnicott described this process psychologically, Schore developmentally, Kalsched psychodynamically, and van der Kolk physiologically, yet each points toward the same underlying developmental process expressed through different disciplinary languages.
Kalsched’s self care system protects the core self by numbing or shutting down parts of the person’s own experience. This is the same interoceptive shutdown described in Spoke 8, viewed here from its psychological side rather than its sensory one. The patient who does not feel their body from the inside and the patient whose inner protector attacks their own feelings are the same patient, described through two different vocabularies. (Kalsched, 1996)
Winnicott described what happens when the environment is not good enough. The child suppresses the True Self and builds a False Self instead, one that organizes around managing the caregiver rather than growing from the child’s own inner life. (Winnicott, 1965). Schore maps this onto the brain directly. The right hemisphere develops along the path the relational field provides. When that field carries chronic threat, the brain builds its regulatory architecture around survival instead of safety.
The adult who grew from that infant does not have a simple relationship to closeness. Intimacy activates both systems at once, the same way the original caregiver did. The move toward connection fires the attachment circuit and the threat circuit at the same time. The person wants closeness and cannot tolerate it. They pursue connection and then sabotage it when it arrives. The PAG fires below the level where the thinking brain can step in and offer reassurance. The oxytocin receptor epigenetic changes described in Spoke 5 provide a molecular correlate of this same conflict, illustrating how chronic threat can impair trust and social connection through altered oxytocin signaling. (Fujisawa et al., 2019). This is not ambivalence in the psychological sense. It is the nervous system’s inheritance from a time when closeness and danger meant the same thing, and the nervous system still runs on that old code. (Schore, 2012; van der Kolk, 2014).
This creates a real problem for treatment. A patient can sit with a therapist for years and talk clearly about the pattern, understand it, name it, even predict it. But talking happens in the cortex. The PAG sits far below the cortex, and it does not respond to insight. (Levine, 2010). This gap explains why so many patients with a strong intellectual grasp of their own trauma still cannot regulate their body when the threat response fires. The mind understood the danger has passed. The PAG did not get the memo.
This gap grows widest in DTD because, for many survivors, much of the original trauma occurred before language developed fully, when the brain’s language networks were still maturing. A patient may be able to talk at length about experiences that shaped them before they had words to represent those experiences, yet many forms of cognitive therapy primarily engage the narrative that formed after language emerged. They cannot directly access neural and regulatory systems that were organized before explicit verbal memory was possible (Schore, 2012). This is why healing in these cases often requires working through the body, not just through the story (Levine, 2010; van der Kolk, 2014).
Until neuroscience and psychology begin speaking a common language, our understanding of complex trauma will remain fragmented.
Although every spoke describes a different aspect of the same process, the treatment is more straightforward than the model itself might suggest.
The Treatment: Neuroplasticity
The preceding sections describe how chronic dysautonomia manifests across multiple physiological systems. The pattern section maps one corrupted hub, the ANS, and how pathology may be seen across many spokes. Treatment follows the same logic, but the hub changes. Here the hub is neuroplasticity, with the nervous system rebuilding what it could not repair in survival mode. Rather than address each spoke independently, the treatment described in this synthesis works to support autonomic balance so the nervous system can build new patterns rather than reinforce old ones.
Rest, digestion, tissue repair, and immune function all depend on parasympathetic activity. In addition, trauma and DTD many times cannot resolve through therapy alone. This holds especially true in PAG driven presentations, where the threat response fires below conscious awareness (Levine, 2010). The nervous system needs direct, body-based intervention to recalibrate a threshold that talk cannot touch (van der Kolk, 2014).
What began as an approach to trauma has expanded to nearly every patient I now see. Soft tissue and orthopedic cases are effortless. Endocrine dysfunction and Long COVID have proven equally responsive. Many patients with pronounced autonomic dysregulation have no trauma history. In clinical practice, these presentations span far beyond mental health and include joint wear and tear, digestive complaints, cardiology, and unresolved fight or flight activation that is often diagnosed as ADHD, anxiety, or chronic stress. Identifying these autonomic patterns complements rather than replaces existing diagnostic and therapeutic approaches.
Diagnosis remains the biggest challenge, since many older adults and trauma patients are treated by separate clinicians, with limited communication between providers. Many physicians receive limited formal training in assessing retained reflexes or the fascial manifestations of chronic autonomic defense. My understanding of these processes emerged through a combination of lived recovery, nearly 30 years in clinical practice, advanced study of neuroplasticity and trauma, and interdisciplinary training in pediatric OT, somatic therapy, and rehabilitation. Together, these perspectives complement conventional medical models by emphasizing autonomic regulation as a clinically relevant component of assessment and recovery. This broader lens may help identify patterns of autonomic dysregulation that are not always captured within conventional medicine and create opportunities for approaches that support neuroplastic recovery.
Prevention matters as much as treatment. Preserving a nervous system that retains adaptive flexibility requires far less time, cost, and suffering than restoring one that has become chronically organized around defense. Dysautonomia is a common finding across a broad range of presenting diagnoses. Ultimately, the nervous system that once adapted around survival retains the capacity to reorganize around safety through neuroplasticity.
The Care and Feeding of Neuroplasticity
As we move into treatment, a shift in perspective is helpful. The goal is not a single intervention or pill to regulate the ANS, but to support the conditions in which neuroplasticity can thrive. The strategies presented are additive. Each contributes to an internal environment that supports autonomic regulation, but none is a cure. Neuroplastic change depends on consistent, repeated experience over time. For this reason, recovery cannot be outsourced entirely to medication, manual therapies, or appointments with healthcare providers. Interventions may facilitate change, but the patients become the primary drivers of recovery through daily practices that reinforce new neural pathways.
This places responsibility, but also agency, back in the hands of the patient. Repeated moments of regulation, presence, movement, breathing, sleep, nutrition, and meaningful connection allow individuals participate directly in reshaping the nervous system. In this way, recovery becomes the ongoing practice of creating the conditions for lasting neuroplastic change.
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AI-assisted drafting was used in preparation and organization of the material for publication.
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