Impact of THC on Brain Response to Threat (IMAGE) Michigan Medicine - University of Michigan Caption These brain scans and graph show that response to a threat was greatly reduced when study volunteers received THC, compared with placebo. This indicates that the brain's cannabinoid system may be a good target for anxiety disorder treatments. Credit K. Luan Phan, M.D. Usage Restrictions None 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.