Brain Energy During Sleep (image) Society for Neuroscience Caption Levels of adenosine triphosphate (ATP), the energy currency of cells, in rats increased in four key brain regions normally active during wakefulness. Shown here is the energy surge measured in the frontal cortex, a brain region associated with higher-level thinking. Credit Courtesy, with permission: Dworak et al. The Journal of Neuroscience 2010. Usage Restrictions For reporters, free use with appropriate credit line. All others, please contact The Journal of Neuroscience. 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.