In Ancient Greece they called it «the sacred disease». Epilepsy affects 50 million in the world and is the most common of serious mental disorders, according to the World Health Organization.
Diagnosing it, however, is not easy.
To do this, a seizure must be recorded when the patient is connected to a machine that performs electroencephalograms, a non-invasive test that allows studying brain electrical activity.
«The symptoms of epilepsy vary a lot and there are many types of epileptic disorders that cause people to react differently to medical treatments,» Vincent Navarro, a neurologist at the Pitie-Salpetriere Hospital in Paris, told the BBC.