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Argument: Marijuana impairs brain functions

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Charles Q. Choi. "Why Marijuana Impairs Memory." Live Science. November 19, 2006: "The active ingredient of marijuana, THC, is known to impair memory and to bind to areas of the brain linked to memory, such as the hippocampus. Still, the exact mechanisms by which marijuana impairs memory remain unclear. Neuroscientists David Robbe and Gyorgy Buzsaki at Rutgers University and their colleagues recorded hippocampus activity in rats. Normally brain cells in this region often synchronize their electrical activity.When the researchers injected rats with THC or a related synthetic drug, they found the normally synchronized workings of the hippocampus became disrupted. While the cells did not change how often they fired nerve impulses, their timing became erratic."

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