GFRAL-Expressing Neurons (IMAGE) Canale Communications Caption GFRAL-expressing neurons (yellow cells) are found exclusively in the brainstem (pictured), and form the 'emergency circuit' of body weight regulation. Credit NGM Bio Usage Restrictions With 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.