Measuring Genes in the Brain (IMAGE) Allen Institute Caption In this image, we see the proportions of inhibitory neuron classes in human and mouse cortex. The colored dots show different inhibitory neuron classes that can be detected in the brain using the combination of genes shown. In this case, the same genes label the same cell classes in mouse and human cortex but, in mouse, the inhibitory neurons labeled with blue dots are much more abundant than the inhibitory neurons labeled with green dots, whereas in human these two inhibitory neuron classes each make up roughly half of the total population of inhibitory neurons in the cortex. The pink dots label a particular inhibitory neuron type that is present in both mouse and humans but is more abundant in human, particularly in the deep layers of the cortex. Credit Allen Institute 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.