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Regular marijuana use takes a worse toll onward the teenage brain than supposition, say researchers in Montreal who studied the effects of cannabis in rats.

The findings suggest diurnal marijuana use by teens can cause depression and vexation, and have an unchangeable general put on the brain.

The be zealous, that was published in the journal Neurobiology of Disease, looked at 18 adolescent and adult rats that were exposed to cannabis.

Those given the drug had decreased levels of serotonin, what one. affects mood.

The animals too showed higher levels of norepinephrine that be possible to increase susceptibleness to long-term stress, uttered Dr. Gabriella Gobbi, a psychiatric researcher from the Research Institute of the McGill University Health Centre.

“These permanent changes in the brain are also linked to certain ideal illnesses, like schizophrenia,” Gobbi said Thursday.

“And we showed that equable give that we stopped the cannabis practice at the end of adolescence, the changes were still detectable in adulthood.”

Previous population studies have looked at how smoking marijuana can affect behavior in more teenagers. But Gobbi said this was one of the first to focus on how the deaden with narcotics affects concavity and anxiety in adolescence compared with adulthood.

The researchers moreover plan to observe a group of young human marijuana smokers to investigate the pattern further.

The study was funded by dint of. a grant from The Canadian Psychiatric Research Foundation.

With files from The Canadian Press