Water Movement Relative to Nerve Fibers (IMAGE) University of Rochester Caption This illustration shows the direction of water movement, perpendicular (radial) and parallel (axial) to a bundle of nerve fibers. Credit David A. Paul/University of Rochester School of Medicine 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.