Visual System of a Fly (IMAGE) Max-Planck-Gesellschaft Caption The visual system of the fly consists of different layers. To perceive motion, the cells of each layer process only certain pieces of information. The neurobiologists of the Max Planck Institute of Neurobiology investigate the nature of these pieces of information and which cells are involved in the process. Credit MPI for Neurobiology/Schorner Usage Restrictions None 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.