Neurons in the Cortex of a Mouse (IMAGE) University College London Caption Neurons in the cortex of a mouse express proteins enabling the 'reading' and 'writing' of electrical activity. Six neurons arranged in the shape of a smiling face were simultaneously activated with light. The response of those neurons is color coded in green, indicating the successful activation of this neuronal pattern of activity. This experiment was performed during the acquisition of experimental data seeking to understand how patterns of activity propagate in the cortex. Credit Lloyd Russell, Hausser lab, UCL 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.