Mouse brain as seen by fMRI (IMAGE) University of Queensland Caption Image caption: mouse brain activity under optogenetic stimulation detected by ultrafast fMRI technique. Red shows a positive response (reflecting excitatory activity) and blue shows a negative response (reflecting inhibitory activity). Credit Credit: Associate Professor Kai-Hsiang Chuang / Queensland Brain Institute Usage Restrictions No altering License Original 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.