Date 30 July 2009
Neuroscience in the News
Topic: ______Long Term Effects of marijuana use on cognition_________________
Presenter Names: Dorice Eaton , Sonia Sillan, Kasey Weeks, Xochilt Guido, Esther Shon
Reference: Cromie WJ. Study: Intelligence, cognition unaffected by heavy marijuana use.
Harvard University Gazette
. 15 Oct
2001. Web. 17 July 2009.<http://www.news.harvard.edu/gazette/2001/10.11/marijuana.html>
(Peer-reviewed journal paper)
Reference: Yucel M, Solowij N , Respondek C, Whittle S, Fornito A, Pantelis C, Lubman DI. Regional Brain Abnormalities
Associated with Long-Term Heavy Cannabis Use
Archives of General Psychiatry
. 2008; 65(6):694-701.
Cannabis- any of the preparations (as marijuana or hashish) or chemicals (as THC) that are derived from the herb hemp
and are psychoactive.
Use of cannabis produces a mild sense of euphoria, as well as impairments in judgment and lengthened response time.
Can be smoked or eaten.
Archaeologists have reported that marijuana was one of the first plants cultivated by humans. It was being used 10,000
years ago for linen, paper, and garments. In China and India, it was being smoked as early as 2700 BC.
century Iraq where it was used to treat epilepsy
or in Egypt where it was used as an inebriant.
The plant appears to have some potential for medical use, particularly as a sedative for glaucoma and disease-related
loss of appetite, as is often seen in cancer, AIDS, and other illnesses.
THC, or tetrahydrocannabinol is a compound within the cannabis plant that has strong psychoactive properties.
Once it reaches the bloodstream, THC takes only a few seconds to reach the brain, where it passes itself off as a
THC attaches to sites called cannabinoid receptors on nerve cells in the brain, affecting the way those cells work.
Cannabinoid receptors are abundant in parts of the brain that regulate movement, coordination, learning and memory,