Rats were found to press a lever up to 2,000 times/hour to receive a drug such as cocaine, resulting in dopamine release in the nucleus accumbens. Rats were also found to push this lever up to 2,000 times/hour to receive brain stimulation that results in release of dopamine in the nucleus accumbens (without receiving a drug). What does this study reveal? The nucleus accumbens is important for reinforcing a behavior O The nucleus accumbens is found only in rodents The nucleus accumbens is not an important area for drug seeking behavior O Rats will push a lever for any reason

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