Cannabis use affects processing of emotions

Cannabis appears to have a significant impact on the recognition and processing of human emotions like happiness, sadness and anger, according to research published in the journal PLOS One.

Scientists are only just starting to understand how cannabis affects the brain.

Cannabis consumption is known to cause immediate, residual and long-term changes in brain activity that can affect appetite and food intake, sleep patterns, executive function and emotional behavior.

Conflicting evidence has suggested that it can intensify both positive and negative mood states.

Lucy Troup, assistant professor of psychology at Colorado State University, and her graduate students wanted to look at how, if at all, cannabis use impacts a person's ability to process emotions.

For nearly 2 years, the team has been conducting experiments using an electroencephalogram (EEG) to measure the brain activities of about 70 volunteers.

All the participants identified themselves as chronic, moderate or non-users of cannabis. They were...

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