Soccer Headers Study Participant (IMAGE) University of Delaware Caption Players were asked to walk on a foam pad with their eyes closed. They were tested under two conditions - one with electrodes placed behind their ears to make them feel like they were falling sideways and another without the stimulation. Credit University of Delaware 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.