Voltron in a Mouse Neuron (IMAGE) Howard Hughes Medical Institute Caption Voltron makes neurons fluoresce under the microscope. When the cells' voltage changes, so does the fluorescence. That lets scientists know when neurons are firing. Credit Ahmed S. Abdelfattah Usage Restrictions Please credit the photographer. 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.