Serotonin Slows Walking Speed (VIDEO) The Zuckerman Institute at Columbia University This video is under embargo. Please login to access this video. Caption Videos of flies using FlyWalker, a program that enables scientists to label and track the position of each of the fly’s footfalls, thereby building a high-resolution picture of it’s walking gait. Top: normal fly walking at around 25 mm/s. Bottom: fly with its VNC serotonin neurons stimulated, which slows its speed to 15 mm/s. Credit Clare Howard/Mann lab/Columbia University's Zuckerman Institute Usage Restrictions Please contact Zuckerman Institute press office for permissions. 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.