(VIDEO) Champalimaud Centre for the Unknown This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption The charge of a visual neuron (top) in the brain of a fruit fly was recorded while the animal was walking freely on top of a floating 3D treadmill. Tracking the position of the legs shows that the charge is in tune with the fly's front leg. Credit Terufumi Fujiwara & Eugenia Chiappe, Champalimaud Foundation. Usage Restrictions Only use with credit and caption. License Original 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.