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