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Polyvagal Theory of trauma and Vagal Tone



"...Polyvagal Theory, a theory that links the evolution of the mammalian autonomic nervous system to social behavior and emphasizes the importance of physiological state in the expression of behavioral problems and psychiatric disorders. The theory is leading to innovative treatments based on insights into the mechanisms mediating symptoms observed in several behavioral, psychiatric, and physical disorders." https://www.stephenporges.com/

"Vagal tone is activity of the vagus nerve, the 10th cranial nerve and a fundamental component of the parasympathetic branch of the autonomic nervous system. ... In this context, tone specifically refers to the continual nature of baseline parasympathetic action that the vagus nerve exerts." wikipedia

 

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