Action Potentials in <i>C. elegans</i> (IMAGE) Rockefeller University Caption Researchers have mapped all 302 neurons that make up the C. elegans nervous system. However, until now, they had never observed action potentials in these cells. Credit Qiang Liu/The Rockefeller University 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.