Norepinephrine Release in the Mouse Brain (IMAGE) RIKEN Caption Specific gene expression allows light to trigger norepinephrine release in the locus coeruleus (yellow). In red, the ventral tegmental area without gene expression. Credit RIKEN Usage Restrictions credit RIKEN 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.