Vitamin A for nerve cells (IMAGE) University of Freiburg Caption Using electron microscopy images, the researchers visualize the dendritic spines (yellow) with their spine apparatus (red) and the synapse terminal buttons (blue). Credit Source: Andreas Vlachos Usage Restrictions the image may only be used with appropriate caption or credit. 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.