A new study has revealed how both recent and lifetime cannabis use can affect cognitive function and working memory.

A new study from the University of Colorado Anschutz Medical Campus suggests that heavy cannabis use negatively affects working memory.

Cannabis use can significantly impact the part of the brain responsible for following instructions, responding during conversations, or remembering a question long enough to answer it. This type of cognitive function is a form of short-term memory called working memory.

The largest study yet into the effects of cannabis on the brains of 18- to 36-year-olds has found that the drug can reduce brain function during cognitive tests. The findings will help people to make an informed decision about the pros and cons of using cannabis.

Heavy weed use appears to dull the brains of young adults, particularly affecting their short-term working memory, a new study suggests. MRI scans showed less brain activation in heavy tokers performing tasks that tested their ability to temporarily hold a limited amount of information at the ready for immediate mental use,