High frequency oscillations (HFO) in the EEG are considered to be new biomarkers with which we can detect epileptogenic
 tissue more accurately than is possible with standard methods. If tissue with HFO has not been removed during surgery, the patient has a high probability of continuing to suffer from epileptic seizures after surgery.

Research on HFO in epilepsy is conducted at Zentrum für Epileptologie und Epilepsiechirurgie (ZEE), a collaboration of the Department of Neurosurgery with the Swiss Epilepsy Center at Klinik Lengg, the Department of Neurology of the University Hospital Zurich, the University Children’s Hospital Zurich, and the Institute for Neuroinformatics, University and ETH Zurich.