Vagus nerve stimulation (VNS). Stimulation of your vagus nerve is a way of regulating the excitability of nerve cells without inducing seizures. The vagus nerve, which starts inside the brainstem, has numerous branches, and vagal nerve stimulation is applied medically to normalize coronary heart level in people with cardiac arrhythmias. https://brainhealthusa.com/psychiatrist-vernon-los-angeles-county/