Cells Crawling in An Electric Field (video) University of California - Davis Loading video... Caption These fish cells crawl towards the negative electrode, or cathode, and change direction when the electric field is reversed. Electric fields may recruit or guide cells into wounded tissue. Credit Min Zhao and Alex Mogilner, UC Davis. Usage Restrictions May be used with acknowledgement of the source. 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.