Reefer Madness: Marijuana Throws Brain Regions Out of Sync - Yahoo! News:
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Marijuana hurts memory and cognition, and a new rat study indicates this is because it causes once-coordinated brain regions to fall out of sync with each other. The result resembles the effects of schizophrenia, the neuroscientists found.
The researchers measured the electrical activity in nerve cells of rats given a drug that mimics the effect of the psychoactive ingredient in marijuana, called tetrahydrocannabinol (THC). The drug had only subtle effects on individual brain regions; however, it disrupted the coordinated activity between regions of the brain.
Specifically, they found the drug disrupted the coordinated fluctuations in electrical activity — called brain waves — across the hippocampus and prefrontal cortex. The result resembled two instruments within an orchestra playing out of sync.
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