Abstract
This 90-minute workshop introduces The Vestibular Paradox, a theoretical framework proposing that childhood trauma transforms the vestibular system from a neurobiological anchor of embodied self-awareness into a mechanism of self-dissolution, with cascading effects on temporoparietal junction (TPJ) connectivity, brainstem-level sensory integration, and dissociative presentations in adulthood. The workshop translates this neurobiological framework into clinically actionable understanding, equipping participants to reconceptualise treatment-resistant dissociative presentations and apply vestibular-informed, phenotype-specific thinking to assessment and case formulation.

The vestibular system is the first sensory system to fully develop, reaching functional maturity by the eighth month of gestation. Under normative developmental conditions, it provides the foundational reference frame for all subsequent sensory integration, anchoring the child's emerging sense of self in embodied physical reality. This presentation synthesises current neurobiological evidence to map how chronic childhood trauma disrupts this foundational system, initiating a developmental cascade that progressively dismantles the neural architecture of embodied self-experience.

The framework draws on convergent evidence across vestibular neuroscience, developmental trauma research, and dissociation studies to trace a primary pathway from disrupted peripheral vestibular input through brainstem fragmentation, thalamic gating, cerebellar dysregulation, and ultimately to TPJ-mediated dissociative experience. The presentation identifies four key pathway adaptations the Vestibular Escape Route, the TPJ Reality Filter, the Thalamic Guardian, and the Cerebellar Scrambler. It reframes these not as pathological dysfunction but as adaptive survival responses reflecting neuroplastic creativity in the face of inescapable threat.

A Dual Pathway Model is introduced, proposing that the same vestibular-TPJ-dissociative outcome can develop through two distinct routes: acute interpersonal trauma (Pathway A), in which the vestibular system is recruited as an emergency escape during discrete traumatic events; and chronic caregiver misattunement (Pathway B), in which the vestibular system fails to build a stable anchor in the first place. Pathway B is argued to operate through the interaction of sensory processing sensitivity, absorption capacity, and developmental egocentrism, and may account for a significant proportion of dissociative presentations in individuals who do not report overt trauma histories.

The presentation further examines how the two PTSD phenotypes classic (hyperarousal/re-experiencing) and dissociative subtype (hypoarousal/detachment) reflect fundamentally different relationships with the vestibular system: disrupted anchoring versus complete reversal. This distinction carries significant implications for assessment and treatment, including why standard grounding techniques can exacerbate dissociative presentations, and why effective intervention may require vestibular-informed, phenotype-specific approaches.

The workshop is structured in three parts: approximately 60 minutes of didactic presentation covering the core framework, neurobiological pathways, dual pathway model, and clinical implications; a 20-minute facilitated discussion in which participants are invited to connect the framework to cases from their own practice; and a 10-minute guided reflection that honours the weight of this material for clinicians, researchers, and those with lived experience of trauma and dissociation. This work aims to equip participants with a neurobiologically grounded, clinically actionable framework that illuminates why some trauma survivors remain profoundly disconnected from their bodies despite years of psychological intervention, and to open new directions for integrated vestibular-somatic-psychological treatment approaches.