Neurons (IMAGE) PLOS Caption Neurons in the lateral intraparietal area of the monkey brain have been shown to integrate information about space and time. A new study asks whether they also "add up" numerical quantity. Credit Roitman et al. Usage Restrictions Please cite the authors and PLoS Biology as the source. 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.