Excitatory and Inhibitory Neurons (IMAGE) Cold Spring Harbor Laboratory Caption Excitatory (green) and inhibitory (red) neurons, shown in this microscopic image of a mouse's brain, respond faster and more immediately as the animal becomes better at performing a task. Credit Churchland lab/CSHL, 2019 Usage Restrictions Attribution needed 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.