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