The first patient in the southeast United States who had the NeuroPace responsive neurostimulator implanted in her brain to control seizures shows marked improvement in just 30 days. The RNS system is for patients who have severe seizures but do not respond to medications and are not candidates for surgery because the location of their seizure onset is at a sensitive part of the brain. It is also only for patients whose seizure onset can be traced to just one or two locations in the brain.