New Study Reveals Impact of Heavy Cannabis Use on Memory Function
A groundbreaking study has uncovered surprising findings regarding the effects of heavy cannabis use on memory. The largest study of its kind to date, conducted by scientists at the University of Colorado Anschutz Medical Campus, has shed light on the potential negative impact of heavy cannabis consumption on working memory.
Recent research indicates a significant increase in cannabis use worldwide, with the number of users rising from 180.6 million in 2011 to 219 million in 2021. This surge in cannabis consumption has been fueled by the legalization of the drug in various countries, including the United States, Canada, and Uruguay.
Previous studies have highlighted the health risks associated with regular cannabis use, such as lung damage, mental health issues, and a potential link to dementia risk factors. The latest study from the University of Colorado Anschutz Medical Campus focuses on the impact of heavy cannabis use on cognitive functions, specifically working memory.
Analyzing data from over 1,000 young adults aged 22 to 36, the researchers categorized participants based on their cannabis usage: heavy users (over 1,000 lifetime uses), moderate users (10 to 999 lifetime uses), and non-users (less than 10 lifetime uses). Using magnetic resonance imaging (MRI), the scientists assessed neural responses in the participants’ brains as they completed various cognitive tasks.
Dr. Joshua L. Gowin, assistant professor at the University of Colorado Anschutz Medical Campus and lead author of the study, expressed his interest in understanding how substances like cannabis impact brain function. The study revealed that working memory was the cognitive function most affected by cannabis use, with 63% of heavy users exhibiting issues during the working memory task.
While the study’s findings suggest a potential link between heavy cannabis use and memory problems, the researchers emphasize the need for further investigation to fully understand the implications. The study, published in the journal JAMA Network Open, underscores the importance of considering the impact of cannabis on cognitive function, particularly in heavy users.
“The cannabis product is reliable, ensuring it won’t turn Einstein into Fred Flintstone but may introduce some clouds to an otherwise clear sky,” Gowin explained. Heavy cannabis use can affect attention and decision-making. Scientists found that heavy cannabis users exhibited reduced brain activity in areas crucial for memory, attention, and decision-making, such as the dorsolateral prefrontal cortex, dorsomedial prefrontal cortex, and anterior insula.
Dr. Joshua L. Gowin stated, “The cannabinoid system is widespread in the brain, and altering its function with products like THC could have various effects. The study aimed to identify the brain functions most impacted by cannabis use, shedding light on its potential effects for informed decision-making.”
Dr. Clifford Segil, a neurologist, shared that the study’s findings align with clinical observations, indicating that heavy cannabis use may lead to memory issues. He suggested further research on the impact of cannabis on driving tasks and in medical marijuana users to assess cognitive effects and risks.
Dr. Jasdeep S. Hundal, a clinical neuropsychologist, expressed concern over the study’s implications on cognitive decline in heavy cannabis users. He highlighted the importance of informed discussions between doctors and patients regarding the potential cognitive consequences of regular cannabis use.
“Individuals and patients, particularly those with a high risk of developing Alzheimer’s disease or other memory-related conditions,” he explained. “Though cannabis is commonly viewed as innocuous or even advantageous for specific medical issues, this research highlights the potential adverse impact on cognitive abilities, specifically affecting working memory and executive function. These cognitive faculties are essential for preserving independence and enhancing quality of life.” Read more about this study on Medical News Today.
