The harmful effects of Marijuana

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Marijuana can interfere with motor coordination, short-term memory, and concentration. And regular marijuana smoking can damage the respiratory tract. If you become a regular user and suddenly stop because you lose access to weed you may start to feel angry and tense. In 2013  114,712,000 people aged 12 and up have used marijuana in their lifetime. This view has received considerable support from studies in animals, which have shown, for example, that prenatal or adolescent exposure to THC can re-calibrate the sensitivity of the reward system to other drugs. Also that prenatal exposure interferes with cytoskeletal dynamics, which are critical for the establishment of axonal connections between neurons. As compared with unexposed controls, adults who smoked marijuana regularly during adolescence have impaired neural connectivity (fewer fibers) in specific brain regions.  In addition, imaging studies in persons who use cannabis have revealed decreased activity in prefrontal regions and reduced volumes in the hippocampus. Thus, certain brain regions may be more vulnerable than others to the long-term effects of marijuana. Regular marijuana use is associated with an increased risk of anxiety and depression, but causality has not been established. 

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