Flood Control (IMAGE) Brown University Caption Controlling the flood of information: The cortex sends 10 times as many axons from its neurons (green) into the thalamus as the thalamus sends from its neurons (red) into the cortex. Cortical neurons control the activity of thalamic neurons by varying the frequency of their signals. Credit Connors lab/Brown University 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.