The Effects Of Marijuana On The Developing Brain

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In this article, Kristen Weir reviews the effects marijuana has on the developing brain. As more states are now legalizing marijuana for not only medical but recreational use, many medical doctors and psychologist fear the long-term effects. Many of marijuana’s long-term effects are still unknown even though it is one of the most widely used illegal substance in the United States. Recreational use in states that marijuana is legalized in only pertains to citizens 21 or older. Even with the age restrictions, some doctors still fear the legalization of marijuana recreational will allow the drug to become more accessible to younger adults or adolescences. Susan Weiss, the director of the division of extramural research at the National Institute on Drug Abuse (NIDA), voiced her concerns on the topic stating, “There are a lot of open questions…. But there 's a growing literature, and it 's all pointing in the same direction: Starting young and using frequently may disrupt brain development." (Weiss). As she acknowledges the fact that there is a “growing literature” when it comes to marijuana use and its effects, she also admits the new research is all leading to the same conclusion, frequent use and starting young may disrupt normal brain development. The government and other private institutions are funding and researching these unknown effects.
Medically, marijuana has proven to be a productive drug. Studies show marijuana has helped dealing with “pain, muscle spasms, seizure disorders and nausea from cancer chemotherapy.” (Weir) Scientist believes these benefits come from a chemical compound in marijuana called cannabidiol. This chemical is not the active chemical that gives marijuana users the mind-altering effects. With the unce...

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...eveloping parts, the frontal cortex, is responsible for planning, judgment, decision-making and personality. Teenagers also have to deal with the immaturity of their endocannabinoid system. This system is accountable for the psychological mechanisms that respond to the active drug in marijuana, THC. Krista Lisdahl, PhD, the director of the Brain Imaging and Neuropsychological Laboratory at the University of Wisconsin, Milwaukee, states, “That system (endocannabinoid) is important for cognition, neurodevelopment, stress response and emotional control, and it helps to modulate other major neurotransmitter systems” (Lisdahl). Frequent exposure to marijuana can “dial down cellular activity in the endocannabinoid system… That sets the stage for why adolescents may be more sensitive to the effects of repeated marijuana exposure, from a neuroscience perspective." (Lisdahl)

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