A study now shows how brain-wide gain modulation, indexed by pupil diameter, shapes the structure of brain-wide neural interactions and, consequently, trial-and-error learning.
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Donner, T., Nieuwenhuis, S. Brain-wide gain modulation: the rich get richer. Nat Neurosci 16, 989–990 (2013). https://doi.org/10.1038/nn.3471
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DOI: https://doi.org/10.1038/nn.3471
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