We thought we had figured out dopamine, a neuromodulator involved in everything from learning to addiction. But the finding that dopamine levels ramp up as rats navigate to a reward may overthrow current theories. See Letter p.575
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Niv, Y. Dopamine ramps up. Nature 500, 533–535 (2013). https://doi.org/10.1038/500533a
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DOI: https://doi.org/10.1038/500533a
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