Somatostatin dampens cortical signaling (IMAGE) Penn State Caption Activity of pyramidal neurons in the prefrontal cortex before (left) and after (right) application of somatostatin. Inhibitory neurons (pink) release somatostatin, a neuropeptide, that binds to receptors on the surface of pyramidal neurons (purple) and other cells in the brain. Representative traces from whole-cell current clamp recordings (black lines) show that the activity of pyramidal cells is reduced following both bath applied somatostatin, and light-evoked somatostatin release. Credit Crowley Laboratory/Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.