Vagus nerve stimulation (VNS). Stimulation in the vagus nerve is a means of regulating the excitability of nerve cells without the need of inducing seizures. The vagus nerve, which begins while in the brainstem, has quite a few branches, and vagal nerve stimulation is used medically to normalize heart rate https://brainhealthusa.com/psychiatrist-in-san-marino-los-angeles-county/