Vagus Nerve Stimulators: An Emerging Epilepsy Treatment What is Vagus Nerve Stimulation?Vagus nerve stimulation (VNS) is a medical treatment for epilepsy and treatment-resistant depression. It involves a device placed surgically under the skin in the chest region that is connected to the vagus nerve in the neck. The vagus nerve is responsible for communicating signals between the brain and different organs in the body including the heart, lungs, and...