Prof. John Ratey is asso­ciate clin­i­cal pro­fes­sor of psy­chi­a­try at Har­vard Med­ical School. He is co-author of Dri­ven to Dis­trac­tion, and A User’s Guide to the Brain: Per­cep­tion, Atten­tion, and the Four The­aters of the Brain -one of the best intro­duc­tions to user-friend­ly brain research I have ever found. He is also the first sci­en­tist…