Neurons (IMAGE) Sanford Burnham Prebys Caption According to this study, nitric oxide not only damages neurons (shown here in green), the gaseous molecule also blocks the brain’s ability to self-repair. Credit Sanford-Burnham Medical Research Institute Usage Restrictions Free to use in conjunction with this story only, using provided caption and credit 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.