The Polyvagal Theory provides a new conceptualization of the autonomic nervous system that leads to insights into causes and treatments of mental and physical illness. The Polyvagal Theory provides a plausible explanation of several features that are compromised during stress and observed in several psychiatric disorders. examples of new methods of biobehavioral assessment and potential strategies for treatment of features associated with autism, auditory hypersensitivities, and trauma will be discussed. The seminar recording will focus on providing information on the major features of the Polyvagal Theory. The Polyvagal Theory is an innovative theory that links the evolution of the autonomic nervous system to affective experience, emotional expression, facial gestures, vocal communication and contingent social behavior. attend this seminar and gain a greater understanding of the automatic reactions of our body to safety, danger and life threat. The seminar recording will provide examples of how a compromised Social Engagement System is refected in the features of several psychiatric disorders and the body's natural response to abuse and trauma. In addition, it will explore how faulty neuroception can have an impact on autonomic regulation and social behavior and how understanding the features that trigger diferent neuroceptive states (safety, danger, and life threat) can be used as a strategy of treatment by triggering neuroceptive states of safety. OBJECTIVES: Describe the foundation of the Polyvagal Theory; Describe how the Polyvagal Theory may demystify several features related to psychiatric disorders and behavioral problems; Describe how deficits in the regulation of the Social Engagement System are expressed as core features of several psychiatric disorders; Explain how maladaptive behaviors, which may accompany several psychiatric disorders, may reflect adaptive responses triggered by survival mechanisms; Explain how the neural process, neuroception, evaluates risk in the environment and triggers adaptive neural circuits, which promote either social interactions or defensive behaviors; Define the Social Engagement System which are the neural mechanisms connecting the brain, face and heart; Explain how features of the Social Engagement System are compromised by stress and trauma.