Over the years, the field of neurology has undergone enormous expansion in clinical and basic data, as well as that of field-related technol ogies. With the problem of neurological diseases reaching epidemic dimensions, treatment possibilities have diversified. Development s ha ve greatly created a need fo r these debates on the numerous controversial issues, in order to obtain relevant clinical conclusions. The intention of the World Congress on Controversies in Neurology (CONy) is to function as a forum for international experts to share and compare experiences, in order to outline appropriate treatment.