Washington: An international research team has found that the persistent, dependent use of marijuana before age 18 cause lasting harm to a person’s intelligence, attention and memory.In a study involving more than 1,000 New Zealanders, individuals who started using cannabis in adolescence and used it for years afterward showed an average decline in IQ of 8 points when their age 13 and age 38 IQ tests were compared. Quitting pot did not appear to reverse the loss either, said lead researcher Madeline Meier, a post-doctoral researcher at Duke University.The key variable in this is the age of onset for marijuana use and the brain’s development, Meier said.Study subjects who didn’t take up pot until they were adults with fully-formed brains did not show similar mental declines. Before age 18, however, the brain is still being organized and remodelled, to become more efficient, she said, and may be more vulnerable to damage from drugs.“Marijuana is not harmless, particularly for adolescents,” said Meier, who produced this finding from the long term Dunedin Multidisciplinary Health and Development Study.
Narendra Modi sent emissaries to me: Geelani
Pak journalist Hamid Mir shot at in Karachi
Book from RAW, a new threat to UPA?
IPL Scam: BCCI`s emergency meet to decide Srinivasan`s fate tomorrow