Advocating for Evidence Based Marijuana Policy
Category Archives: College Age Use
Heavy cannabis use associated with reduced dopamine release in brain: Effect similar to other addictions.
Source: Columbia University Medical Center:
“Heavy cannabis use associated with reduced dopamine release in brain: Effect similar to other addictions.” ScienceDaily. 14 April 2016. <www.sciencedaily.com/releases/2016/04/160414214826.htm>.
Evidence of a compromised dopamine system has been found in heavy users of marijuana. Lower dopamine release was found in the striatum — a region of the brain that is involved in working memory, impulsive behavior, and attention. Previous studies have shown that addiction to other drugs of abuse, such as cocaine and heroin, have similar effects on dopamine release, but such evidence for cannabis was missing until now.
What’s the Rush, Research and Analysis Team Note:
Researchers also that in all participants lower dopamine release was associated with worse performance on learning and working memory tasks. Heavy use was defined as daily for seven years beginning at age 16.
E van de Giessen, J J Weinstein, C M Cassidy, M Haney, Z Dong, R Ghazzaoui, N Ojeil, L S Kegeles, X Xu, N P Vadhan, N D Volkow, M Slifstein, A Abi-Dargham. Deficits in striatal dopamine release in cannabis dependence. Molecular Psychiatry, 2016; DOI: 10.1038/mp.2016.21
Daily marijuana use among U.S. college students highest since 1980
University of Michigan. (2015, September 1). Daily marijuana use among U.S. college students highest since 1980. ScienceDaily. Retrieved September 2, 2015 from http://www.sciencedaily.com/releases/2015/09/150901095321.htm
- ScienceDaily Summary:
- Daily marijuana use among the nation’s college students is on the rise, surpassing daily cigarette smoking for the first time in 2014.
WTR-RI Research and Analysis Note:
This analysis of trends in the Monitoring the Future Study data includes trends in prescription drug, opiates, cocaine, alcohol and several other abusive substance categories. The full report is available online at: http://monitoringthefuture.org/pubs/monographs/mtf-vol2_2014.pdf