Neurologist Conrado Estol sat down with LA NACION for an exclusive interview on keeping the mind active deep into old age. His core message on staying sharp at 80 was blunt: a person has to keep doing the same things they did at 40. In the conversation he laid out the steps to follow for aging in a healthy way. He also cautioned that the traditional concept of old age has to be abandoned. The advice comes from one of the best-known names in his field.