cells.jpg (IMAGE) University of Wisconsin-Madison Caption Patterns in the tiny amounts of light emitted by these neural stem cells helped researchers determine whether they were active or dormant without destructive testing. Credit Image courtesy of Darcie Moore Usage Restrictions None License Original 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.