Neurons sorted into subtypes (image) University of California - San Diego Share Print E-Mail Caption The research team was able to classify neurons based on chemical modifications in their DNA. Pictured here are clusters of different kinds of 'stop' and 'go' neurons in the human frontal cortex. Credit Image by Jamie Simon, Salk Institute. Usage Restrictions Only with reporting on this study Share Print E-Mail 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.