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