Nerve Fibers (IMAGE) Neural Regeneration Research Caption S100 positive nerve fibers were visible in the scar tissue layer in the mechanical forces group at two weeks post-injury. Credit <i>Neural Regeneration Research</i> 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.