Maths quiz helps paralysed people talk with their eyes - New Scientist

via brain teasers - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNHMLz2Z9jTgWQQt-PZSiOkl4LmWnw&url=http://www.newscientist.com/article/dn23989-maths-quiz-helps-paralysed-people-talk-with-their-eyes.html