GMV and Cannabis (IMAGE) Society for Neuroscience Caption Figure 1 (a) Those regions showing significantly greater GMV in 14 year olds reporting one or two instances of cannabis use than in matched controls. Credit Orr et al., <i>JNeurosci</i> (2019) 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.