Vagal tone, development, and Gray's motivational theory: Toward an integrated model of autonomic nervous system functioning in psychopathology (cambridge.org)
Also seen to have action on autonomic nervous system in the vagal pathway, the effects on body temperature, blood pressure, and anxiety have been well documented. (tandemtrouble.com)
Research on autonomic nervous system activity to rejection experiences has been contradictory, with opposing strings of argumentation (activating vs. numbing). (journals.plos.org)