In a study published in the Society for Neuroscience meeting, reported that people who began using marijuana in their teens more susceptible to cognitive impairment. Besides, if they still continue to use drugs until adulthood, the greater their risk of experiencing problems in focus and attention.
"At the age of adolescence, the brain has a different pattern of activity with adults. Therefore the use of drugs in this age can affect the brain in the long run. Moreover, 80 percent of new adolescent brain is formed and a new development in the mature age of 20 years," said Staci Gruber , from Harvard Medical School who conducted the study.
He and his team conducted a study of 29 people is not a drug user and 35 chronic marijuana smokers, ie 20 people who started using marijuana before the age of 16 and 15 people start smoking after age 16 years. When this study started all respondents aged 22 years.
From the results of cognitive tests, the users of marijuana has the worst test results. Based on the results of an MRI scan, it looks a disturbance activity in the frontal cortex. The frontal cortex is part of the brain that regulate the function of attention, decision-making and other noble function.
"The drug users also tend to be more impulsive. The higher their impulsive nature, the worse the results of tests conducted," said Gruber. He added a direct link to impaired cognitive function was also determined by the age of starting to use marijuana and the amount smoked per day.
Several studies have also been conducted to determine the adverse effects of drugs. One of them mentions the receipts sedative impaired brain associated with memory functions and decision making.
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