Scientists Discover How to Herd Cells (video) University of California - Berkeley Loading video... Caption Videos show the effect of electric fields on the movement of epithelial cells. The first clip shows the cells migrating normally until the electric field is turned on, causing the population to move right. In the second video, the electric field causes the population of cells to make a U-turn. Credit Video by Daniel Cohen Usage Restrictions All rights reserved. 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.