Oran Knowlson, 13, from Somerset has suffered from Lennox-Gastaut syndrome, a treatment-resistant form of epilepsy, since he was three. But a new brain implant has reduced his seizures. Oran Knowlson, 13, from Somerset has suffered from Lennox-Gastaut syndrome, a treatment-resistant form of epilepsy, since he was three. But a new brain implant has reduced his seizures.