Nausea neurons (IMAGE) Harvard Medical School Caption GLP1R neurons (red) play a critical role in detecting toxins in blood vessels (green) and initiating the nausea response. Credit Chuchu Zhang , Stephen Liberles Usage Restrictions None 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.