Cannabis consumers show greater susceptibility to false memories
http://www.eurekalert.org/pub_releases/2015-04/uadb-ccs042115.php

http://media.eurekalert.org/multimedia_prod/pub/web/90424_web.jpg
The image shows the brain activation pattern which permits ruling out a stimulus as a false memory. In the control group, the activations are much more intense and extensive than in the group of cannabis consumers.