Dr. Sebastian Markett, University of Bonn (image) University of Bonn Caption Dr. Sebastian Markett from the department for Differential and Biological Psychology of the University of Bonn examined variants of a gene affecting signal transmission within the brain's frontal lobes. Credit (c) Photo: Volker Lannert/Uni Bonn Usage Restrictions This photo may be used with the press release. 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.