New Marijuana Target (IMAGE) Society for Neuroscience Caption This working model shows how chronic exposure to the psychoactive component of marijuana may increase dopamine levels by altering the function of an inhibitory cell type, contributing to the drug's pleasurable and potentially addictive qualities. Credit Friend et al., <i>JNeurosci</i> (2017) 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.