Hormonal Influence in Brain Developments (IMAGE) University of Oregon Caption In a fruit fly in which the signaling of a steroid hormone was blocked in experiments at the University of Oregon, glial cells (magenta) no longer needed at a particular stage of brain developments are over-produced by neural stems cells (green). Credit Image courtesy of Mubarak Hussain Syed 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.