From Sleep to Awake (IMAGE) Kyoto University Caption Two genes, Hes1 and Ascl1, control the sleeping and waking of adult neural stem cells and their expression fluctuates in waves. Credit Kyoto University/Robin Hoshino 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.