What Marijuana Does to Your Brain

What Marijuana Does to Your Brain Addiction Drug Use Marijuana Print How Marijuana Affects Your Brain By Buddy T facebook twitter Buddy T is an anonymous writer and founding member of the Online Al-Anon Outreach Committee with decades of experience writing about alcoholism. Learn about our editorial policy Buddy T Medically reviewed by Medically reviewed by Steven Gans, MD on August 05, 2016 Steven Gans, MD is board-certified in psychiatry and is an active supervisor, teacher, and mentor at Massachusetts General Hospital. Learn about our Medical Review Board Steven Gans, MD Updated on September 18, 2019 skodonnell / Getty Images More in Addiction Drug Use Marijuana Cocaine Heroin Meth Ecstasy/MDMA Hallucinogens Opioids Prescription Medications Alcohol Use Addictive Behaviors Nicotine Use Coping and Recovery More is known about the short-term effects of marijuana on the brain that is known about the long-term effects that the drug produces. Marijuana affects cannabinoid receptors which are found in brain regions that influence learning, memory, appetite, coordination, and pleasure.?? Affecting those receptors is how marijuana use produces the effects it has on users. What researchers do not fully understand is what effect that marijuana can have on the brain when someone uses the drug regularly over a long period of time. MRI imaging studies show that there are differences between the brains of marijuana users and non-users.?? Impaired Neural Connectivity According to the National Institute on Drug Abuse, what scientists do not know is what the differences seen on the MRI images mean and how long the difference last, if someone quits using marijuana.?? MRI image studies of teen brains show that those who regularly use marijuana display impaired neural connectivity in specific brain regions involved in a broad range of executive functions like memory, learning, and impulse control compared to non-users.?? Loss of I.Q. Points A large, longitudinal study in New Zealand found that frequent marijuana use by adolescents was linked to an average loss of 8 I.Q. points in mid-adulthood.?? That same study also found that teens who used marijuana in adolescence but quit using as adults did not recover the lost I.Q. test points. Largest Effect on Young Brains Researchers believe that marijuanas strongest long-term effects occur with young smokers who brains are still developing neural connections.?? Research into the effects of marijuana on the brain has been hampered by the fact that most people who use marijuana also drink alcohol, or other substances, which can have their own negative effects on the brain.??