Clusters of Neural Crest Cells (IMAGE) University College London Caption This is a cluster of neural crest cells, where the protrusions can be seen at the border of the cluster. Credit Roberto Mayor, UCL 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.