Allen Brain Observatory Cell List (IMAGE) Allen Institute Caption A small sample of the novel data visualizations for each of the nearly 40,000 neurons contained in the Allen Brain Observatory. Mice were presented with a large variety of visual stimuli to determine the "tuning," or preference, of each individual cell to visual features. Credit Allen Institute Usage Restrictions With credit to Allen Institute 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.