The Author of the Polyvagal Theory clarifies how social behaviour attenuates defences promoting actions that allow to feel safe. According to this theory, interventions that stimulate the feeling of being safe and the use of social behaviour to adjust physiological states are particularly effective for the treatment of psychological disorders depending on the activation of the inadequate system of defences. Highlights the connections between functions of the peripheral nervous system and behaviour, with particular interest to neurophysiological variables associated with emotions, attachment, social communication, self-regulation, defensive strategies and psychiatric disorders. In this theory, he sustains that the evolution of the peripheral nervous system is connected with affective experience, expression of emotions, voice communication and consequent social behaviour.
Keywords: Trauma, polyvagal theory, dissociation, self-regulation.