Workshop 2009 MRgFUS Symposium 2008 Library Publications Videos Focused Ultrasound Videos European Symposium on MRgFUS CRN Skip to content Epilepsy Epilepsy Background Epilepsy is a common  chronic neurological disorder characterized by recurrent unprovoked  seizures . These seizures are transient signs and/or symptoms of abnormal, excessive or synchronous neuronal activity in the brain. While more