Vagus Nerve Stimulation (VNS) is a medical treatment that involves delivering electrical impulses to the vagus nerve, which runs from the brain to various organs in the body. This therapy is often used to help manage conditions like epilepsy and depression when other treatments have not been effective. A small device, similar to a pacemaker, is implanted under the skin in the chest and connected to the vagus nerve. The stimulation can help regulate mood and reduce seizure frequency by influencing brain activity. VNS is typically considered when patients have not responded well to medications or other therapies, providing an alternative option for symptom management.