Researchers from Vanderbilt University have found that some brains process dopamine differently resulting in greater "thrill seeking" behavior, says BBC News. Essentially, these individuals have fewer dopamine "autoreceptors" in their brains, which would normally result in a feedback loop that...
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http://blog.bioethics.net/2009/01/thrill-seeking-brains-and-the-people-who-have-t
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