Vagus nerve stimulation (VNS). Stimulation of your vagus nerve is a method of regulating the excitability of nerve cells with out inducing seizures. The vagus nerve, which begins inside the brainstem, has several branches, and vagal nerve stimulation is employed medically to normalize heart rate in people with cardiac arrhythmias. https://brainhealthusa.com/psychiatrist-in-san-marino-los-angeles-county/