A person with intractable epilepsy, someone who doesn't respond to or get control from medications after multiple medication trials, is someone who might be a candidate for epilepsy surgery. Most of those patients have partial seizures, that is seizure that come from one part of the brain. Once that is determined, that they're not responding to medication or the noninvasive treatment, then you would go onto a seizure surgery workup or seizure surgery protocol. That involves more intense monitoring, usually going into the hospital, having seizures that are recorded to make sure they're all coming from the same place. They have specialized MRI and other imaging tests, they have neuropsychological testing, and sometimes other testing called water testing to see if the memory can be supported on the part of the brain that is going to be left. Once that's all completed, it's determined whether or not they're surgery candidates.
