Lab-Grown Nerves Promote Nerve Regeneration (IMAGE) University of Pennsylvania School of Medicine Caption This is a surviving cluster of transplanted neurons at the graft extremity (top) with axons in the center (bottom). In both images, transplanted nerve cells are labeled green and axons are stained red. These axons are a mix of the transplanted axons and host axons, which intertwined as regeneration occurred directly across the transplanted tissue. Credit Douglas H. Smith, MD, University of Pennsylvania 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.