This is the same vagus nerve that responds to probiotic bacteria by making you feel better and is even felt to be a treatment for depression. Conversely ( you recall from previous blogs) that bacteria fed with sugar and the breakdown of grains ( into sugar) caused more pain and a tendency to not be happy with the world. More stress and all that.
I don't know how long this article will stay available, so check it out. Again, I don't make this stuff up.
BB
http://www.dailymail.co.uk/health/article-3674430/Arthritis-agony-cure-Neck-implant-gives-small-shock-help-patients-complete-remission.html