International
People who are heavy cannabis users could have poorer working memory skills even if they haven't used the drug recently, according to international research. The team put 1000 adults through a series of tests to measure their brain function, including working memory, emotion, language and motor skills - comparing the results based on how much cannabis the participants had used in the past and recently. The researchers say those considered to have a history of heavy cannabis use performed worse during the task testing working memory, and brain scans showed lower brain activation in several regions. The researchers say this link between poorer memory skills and heavy cannabis use persisted even when they removed participants who had used cannabis recently.
From:
About The Study: Lifetime history of heavy cannabis use was associated with lower brain activation during a working memory task in this study of young adults. These findings identify negative outcomes associated with heavy lifetime cannabis use and working memory in healthy young adults that may be long lasting.
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