Brain Cancer Cell (IMAGE) University of Minnesota Caption A brain cancer cell generates traction forces to move much like a car with a motor that generates force and a clutch that transfer that force to structures that grip the tissue along which they move. In this image, those forces are indicated by arrows. The larger arrows and warmer colors represent higher forces. Credit University of Minnesota Usage Restrictions with credit to the University of Minnesota 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.