A small electrical device, like a pacemaker, is placed under the skin on the chest. From it a wire goes under the skin and connects to the vagus nerve, which is a nerve in the neck. Bursts of electricity go along the wire to the nerve to help make seizures less regular and less severe. When the electrical signal is happening, every five minutes for 30 seconds, you may have a hoarse voice, a sore throat and a cough. The battery of the VNS will need to be replaced about every 10 years.