Cannabis is the most widely used recreational drug in developed nations1. Its legal status has been a source of enduring controversy2, gaining particular momentum recently in the United States3. Yet, concerns about putative influences of cannabis on brain structure/function remain salient4. Neuroimaging studies have found inconsistent evidence linking cannabis to brain structure where recent meta-analyses noted possible associations between cannabis and hippocampus (and potentially amygdala) structure5,6.
