Behavioral Brain Circuits Conserved across Species (6 of 7) (video) American Association for the Advancement of Science Share Print E-Mail Loading video... Caption Video-assisted motion tracking allows the quantitative analysis of fruit fly behavior. Shown on the left are normal flies in their arenas during a one-minute recording. On the right are flies in which parts of the central complex are defective. These flies exhibit Parkinsonism, as they have problems with initiating and maintaining movement. This video relates to a paper that appeared in the April 12, 2013, issue of Science, published by AAAS. The paper, by Nicholas Strausfeld at University of Arizona in Tucson, Ariz., and colleagues was titled, "Deep Homology of Arthropod Central Complex and Vertebrate Basal Ganglia." Credit [Video courtesy of Dr. Dickon M. Humphrey, Hirth Lab, King's College London] Usage Restrictions Please cite the owner of the video when publishing. This video may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. 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.