Fruit Fly Neural Navigation System (IMAGE) Howard Hughes Medical Institute Caption When a fruit fly turns, E-PG nerve cells that form the ellipsoid body compass (purple) get updates from P-EN nerve cells in the handlebar-shaped protocerebral bridge (green). Credit Credit: Courtesy of Tanya Wolff and Gerry Rubin Usage Restrictions Must include 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.