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バンクーバー 2015/03/14 10:48:27
昨年の書いたショートエッセイの一部です。脳の発達過におけるマリファナ摂取がどう影響を及ぼすか、様々なリサーチが行われています。他者をたたく暇があればご自身で学ぶ努力をなさってはいかがでしょうか。
Increased marijuana use has shown to have negative effects on mental health. It has been proven to significantly affect the brain, especially in adolescents. Studies have shown that “teenagers, in particular, are susceptible to the negative effects of marijuana because parts of their brains are still developing. People who start using marijuana as teens are potentially at risk of losing IQ points because of an interference in normal brain development that occurs in the teenage years”(Radcliffe). The fact that cannabis usage produces negative effects is frightening because the nervous system is the crux of the body which allows human beings to function properly. Also, research published in the International Journal of Drug Policy (IJDP) in February in 2014, found that about 10 percent of high school students say legalization may lead them to smoke habitually (CBS Radio). Considering that possible negative effects it can have on the brain, this percentage does not sound like such a small proportion. Another study by Dr. Meier, which was presented at the 14th International Congress on Schizophrenia Research (ICOSR), provides the specific data that “[1037 people who started using cannabis during their teenage years] and continued to use it for years thereafter lost an average of 8 IQ points”(Lowry). Given that out of maximum 200 points, 95 points are average and over 140 points are genius, a drop of 8 points in IQ is definitely not a small fraction and should be considered seriously. Moreover, there was an increase from 2.4 percent of seniors smoking daily in 1993, up to 6.5 percent in 2013(Weller). This percentage almost tripled during this period of 20 years and may continue to rise. These cases explain that the decline in IQ, specifically among youth, was caused by smoking marijuana and that deregulation has increased the usage rates. Simply put, cannabis use is on the rise and has been made easier to acquire by the legalization in different places, and has had negative impacts on health in terms of interfering with brain development, particularly among teens.
Another problematic issue in adolescents more frequently using cannabis, has been seen in the increase of cases of behavioral disorders. Early exposure to the THC in cannabis can produce mental disorders, possibly leading to more serious disability, such as major depressive disorder (MDD). Daily users are at high risk of developing depression. Numerous human studies have demonstrated that “early cannabis use is associated with MDD, and marijuana [users] have been shown to have higher levels of depression and depressive symptoms than [non-users]” (Lev-Ran et al., 2013; Pacek et al., 2013). In addition, statistics surveyed over a two-year period from 2007 to 2009 shows that cannabis users suffer mental health issues twice more often than who do not(CBS). This investigation illustrates that marijuana usage may accelerate these cases. A Study which was carried out in secondary school indicated that around 1600 students had smoked cannabis which signifies that 7% of those who participated were daily users and that most of these habitual smokers claimed increasing depressive conditions(). The consistent use of it can lead to cannabis dependence as well as behavior disorders. These studies above reveal that chronic cannabis use among adolescents is strongly linked to an increased risk of psychiatric disorders. In other words, the evidence suggests that the association between the lenient cannabis laws and marijuana exposure during youth have led to increase mental issues.
Works Cited
New York University “Prevalence of high school seniors' marijuana use is expected to increase
with legalization."ScienceDaily. ScienceDaily, 25 Feb. 2014.Web 03 Mar. 2014.
Christensen, Jen "Regular marijuana use on the rise, survey says." CNN. CNN, 05 Sep. 2013.
Web. 03 Mar. 2014
Radcliffe, Shawn “Marijuana Legalization: The Experts Weigh In” Healthline. Healthline,
06 Jan. 2014. Web. 05 Mar. 2014.
“Will legalization lead to more teens smoking pot?” CBS Seattle. CBS Radio, 26 Feb. 2014.
Web. 05 Mar. 2014.
Lowry, Fran “medical news” Medscape. Web.MD LLC, 26 Apr. 2013. Web. 05 Mar 2014
Weller, Chris “60 Percent Of High School Seniors Give Smoking Marijuana The ‘OK’”
Medical daily. IBT Media Inc, 18 Dec 2013.Web. 05 Mar 2014.
“American teens more cautious about using synthetic drugs” University of Michigan.
University of Michigan, 18 Dec. 2013
“LEGALIZED MARIJUANA HURTS COLORADO’S IMAGE, SLIM MAJORITY TELLS QUINNIPIAC UNIVERSITY POLL; ONLY 10% SAY THEY’VE USED MARIJUANA
SINCE LEGALIZATION” Quinnipiac University. Quinnipiac University, 10 Feb. 2014.
Web. 05 Mar. 2014.
Smith, Aaron “Colorado stash: $184M in marijuana taxes” CNN. Cable News Network.
A Time Warner Company, 20 Feb. 2014.Web. 01 Mar. 2014
Walker, John “These 5 Numbers Show Marijuana Legalization Is Going Well in Colorado”
JUST SAY NOW 25. Np, Feb 2014.Web. 03 Mar. 20
Statistics Netherlands “Pilot Project on Morbidity Statistics” Institute for Public Health and the
Environment (RIVM). National Netherlands. Jun 2011
Forensic Science International. Elsevier Ireland Ltd. Lars Radünz Volume 215, Issues 1–3, 10 February 2012, Pages 171–174
HOPES. Stanford University. Medical Marijuana Policy in the United States . May 15th, 2012
Healy, Jack “Colorado Expects to Reap Tax Bonanza From Legal Marijuana Sales” The New York Times Company. 20 Feb. 2104. Web. 12 Mar. 2014
Poltonowicz, John “Marijuana Sales in Colorado to Reach $1 Billion”Guardian Liberty Voice, The New York Times Company. 09 Mar 2014. Web. 12 Mar. 2014
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