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The observed effects on memory and learning, they said, showed long-term cannabis use caused "selective memory defects", but "of a very small magnitude". [85] A study by Johns Hopkins University School of Medicine found that heavy cannabis use is associated with decrements in neurocognitive performance even after 28 days of abstinence. [86]
The earliest systematic studies of physiological effects of cannabis-derived chemical were conducted in the 1920's (see Fig. The number of publications about marijuana/cannabis). The level or research activity in this area remained relatively low and constant until 1966, when a 10-fold increase in publication activity occurred within 10 years.
Legal cannabis (marijuana) product. Overconsumption and reliance could lead to cannabis-induced amotivational syndrome. The term amotivational syndrome was first devised to understand and explain the diminished drive and desire to work or compete among the population of youth who are frequent consumers of cannabis and has since been researched through various methodological studies with this ...
An April 2023 study published in Cureus documented an increase in emergency room visits for psychiatric effects of cannabis after Michigan legalized the drug in 2018. Nearly 20% of emergency room ...
Contrary to existing cross-sectional studies showing marijuana use in adolescence is associated with poor cognitive functioning, there were no associations between long-term cannabis use and memory and processing speed. [55] While this study showed no correlations between memory and cannabis use, others have found that there is.
Using marijuana daily for years may raise the overall risk of head and neck cancers three- to five-fold, according to a new study that analyzed millions of medical records. “Our research shows ...
As of 2021 there is a lack of research into long-term cognitive effects of medical use of cannabis, but one 12-month observational study reported that "MC patients demonstrated significant improvements on measures of executive function and clinical state over the course of 12 months". [46]
The "Dr. Phil" show responded to the criticism in a statement to Vice, citing a 2012 study on marijuana use and added that the controversial clip was meant to focus on JJ's violence, not his drug use.