next time we are going to take up something called ignosia, this also comes from freud, people used toink blindness is as a result of defect in their eye and he discovered a patient who his eye was perfectly normal but he had a defect in the high reaches of the visual system and he developed the word ignosia a defect from vision which comes from a cortical region and now have people that have face blindness, that can't recognize faces, people who have difficulty with music recognition so we can check close, who has face blindness, and a great portrait paint search going to join us. >> rose: wow. >> that is fantastic. >> rose: until next time, thank you all. >> thank you very much. captioning sponsored by rose communications captioned by media access group at wgbh access.wgbh.org >> the charlie rose brain series is about the most exciting scientific journey of our time. understanding the brain. the series is made possible by a grant from the sigh monls foundation, their mission is to advance the frontiers of research in the basic sciences and mathematics. funding for charlie rose has be