10 Ways to Stimulate Vagus Nerve Vagus nerve regulates the body functions across the nerve route and plays an important role in rest and digest nervous system. Low vagal tone is associated with poor emotional health along with some others symptoms like unusual heart rate, loss of Gag reflex, difficulty in drinking liquids etc. We have to improve and increase the vagal tone by stimulating the parasympathetic nervous system. Introduction Vagus nerve is the 10th cranial nerve also known as