The metabolic activity of the brain is constant over time. It consists of the oxidation of glucose to carbon dioxide and water, resulting in large amounts of energy in the form of [[ATP]]. This happens whether we are resting or active. --- **Source**: Raichle, M. E., and D. A. Gusnard. “Appraising the Brain’s Energy Budget.” Proceedings of the National Academy of Sciences 99, no. 16 (August 6, 2002): 10237–39. https://doi.org/10.1073/pnas.172399499.