In the Sleep Laboratory (image) University of Bonn Share Print E-Mail Caption Dr. Nadine Petrovsky and professor Dr. Ulrich Ettinger from the Institute of Psychology of the University of Bonn measure the filtering function of the brain in a test subject (center) using the prepulse inhibition. Credit (c) Photo: Volker Lannert/University of Bonn Usage Restrictions This photo may be used with the press release. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.