Study results (recently published in the Journal of Neuroscience
related to recreational use of marijuana and brain changes in the amygdala and nucleus
accumbens) fit with animal studies that show when rats are given
tetrahydrocannabinol (THC)—the mind-altering ingredient contained in marijuana—their
brains rewire to form many new connections. In animals, these new connections
indicate the brain is adapting to the unnatural level of reward and stimulation
from marijuana. The result of these new connections is to make other natural
rewards less satisfying. Lead author Jodi Gilman said, “It may be that we’re
seeing a type of drug learning in the brain. “We think when people are in the
process of becoming addicted, their brains form these new connections.”
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