METHODS: The research subject that will be studied might present some characteristics: over 20 years old, literate, of both genders, and candidate for surgery under general anesthesia in the Hospital das Clínicas of the Faculty of Medicine, University of São Paulo. Reliability MentalPlus® analysis will be performed as the first part of the study with healthy volunteers. Later, the volunteers assess cognitive functions, like memory, attention, and executive functions, using a usual psychological test battery. Compare the psychological test battery results with MentalPlus® video game scores. The MentalPlus® digital game will be applied to all study phases. A third project will use functional magnetic resonance imaging (fMRI) to assess the association between brain response and cognitive training by MentalPlus®.