Bivalent neurons (IMAGE) Estonian Research Council Caption Bivalent neurons: Bivalent neurons. Photo: Eve-Ellen Govek, Rockefeller University. Credit Eve-Ellen Govek, Rockefeller University Usage Restrictions Only for usage with the article. License Original 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.