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Now that marijuana is recreationally legal in 11 states and medically legal in 33 states smoking has become mainstream. Individuals who smoke sometimes report paranoia while using the drug. Researchers are digging in to determine the likelihood of this result.

We have more light on the subject due to a study by Western University. Researchers decided to dig into psychological effects from tetrahydrocannabinol (THC). The study uncovered that THC can trigger highly divergent psychological reactions depending on what part of an individuals brain is sensitive to the drug.

The study used rats to find evidence of the psychological reactions to weed. The responses depended on which part of the brain was most sensitive. The front part of the brain would produce rewarding effects (for example feelings of relaxation and joy). The back of the brain would produce negative reactions (like paranoia or fear).

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