According to a recent study conducted by University of Michigan researchers, long-term marijuana usage is associated with a decrease in the brain's response time. The study, published in JAMA Psychiatry, brought forth new information about the effect marijuana can have on the brain of a young adult user.
To determine whether marijuana use among young adults prospectively affects nucleus accumbens (NAcc) activation during reward anticipation.
More than 100 young adults were recruited from the Michigan Longitudinal Study, an ongoing study of youth at high risk for substance use disorder and a contrast sample of control families. Participants underwent three consecutive functional magnetic resonance imaging scans at approximate ages of 20 (time 1), 22 (time 2), and 24 (time 3) years. Self-report data on marijuana and other drug use occasions were collected annually since age 11 years old. Click to read more....