Brain at Work (IMAGE) Rockefeller University Caption Neurons within a three-dimensional section of mouse brain, in a movement-planning region, light up as they signal to one another. The neurons were genetically altered to fluoresce upon taking in calcium ions, which happens when neurons are active. Credit Laboratory of Neurotechnology and Biophysics at The Rockefeller University/Nature Methods Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.