The Vagus nerve is the largest nerve outside the spinal column, it connects from the brain to all the major organs and through them, the endocrine system. It has been noticed by medical studies that people’s health is strongly related to the way this nerve is active. The Vagus nerve has one section which seems to send communication down from the brain to the organs, and another section or column that communicates back to the brain. If this data/communication is active and busy it is a good sign that people are healthy and vis-versa, if the communication is below a certain level in either direction, it is an indicator that something is not right. Mindfulness meditation seems to encourage this communication traffic and contributes hugely to the health of the nerve and the body
To read more on the importance of this nerve and how meditation can help to bring benefits please follow the following links.
https://thelivingproofinstitute.com/what-happens-in-vagus/
https://helenpapas.wordpress.com/2012/11/27/activating-the-vagus-nerve/