Niels Birbaumer is a psychologist and neurobiologist. He is a leading figure in the development of brain-computer interfaces, a field he has researched for 40 years, with a focus on treating brain disturbances. He has been awarded numerous international honours and prizes, including the Gottfried Wilhelm Leibniz Prize and the Albert Einstein World Award of Science. Professor Birbaumer is co-director of the Institute of Behavioural Neurobiology at the University of Tubingen in Germany, and senior researcher at the Wyss Centre for Bio- and Neuro-engineering in Switzerland.Jorg Zittlau is a freelance journalist and writes about science, psychology, and philosophy, among other topics. He is also the author of several bestsellers.