His clinical and scientific areas of expertise are: refractory paediatric epilepsy, epilepsy surgery, imaging in epilepsy, and childhood arteriopathic stroke, in particular moyamoya treatment.
He coordinates epilepsy research in the UMCU Brain center. The epilepsy research projects he is personally involved in focus on the effects of focal epilepsy on the brain in animal models and patients (structural and functional integrity and network analysis); seizure- and cognitive outcome after paediatric epilepsy surgery; postoperative antiepileptic drug withdrawal; ESES treatment; stress and epilepsy; and epileptic focus detection in surgical candidates.