I’m currently reading The Vagus nerve reset by Anna Ferguson which talks about the polyvagal theory and training your body to heal stress trauma and anxiety. It talks about the importance of the nervous system in healing, regulating and maintaining our health and well being. For those not so medically minded it gives a good basic description and breakdown of the nervous system and its role and of course the vagus nerve and its importance. 

Polyvagal theory was developed by  Dr Stephen Porges - professor of Psychiatry and Bioengineering at the University of North Carolina hospitals in Chapel Hill. He states that we are hardwired with a third response of the vagus nerve (1. Parasympsthetic ns which calms us  and 2. Sympathetic  ns which excites or activates us) 3 Autonomic ns being the social engagement system which explains the role of the ns in our behaviour, emotions and overall mental health. The ANS interprets safety or danger. 

It’s all related to fight, flight and freeze responses in different situations for different people. She teaches ways to train your nervous system to respond to certain situations through movement, breath work, diet and teaches how to recognise triggers.