Maps Made of Nerve Cells (VIDEO) University of Freiburg This video is under embargo. Please login to access this video. Caption The mouse moves through the virtual world of the video game with the help of a styrofoam ball that floats on compressed air. Credit Source: Thomas Hainmüller, Marlene Bartos Usage Restrictions The video may only be used with appropriate caption or credit. License Licensed content 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.