Primary auditory cortex neurons are now shown to respond to the probability of a sound's occurrence--perhaps a correlate of the mismatch negativity implicated in novelty detection.
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Kamal Masuta
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Moore, D. Cortical neurons signal sound novelty. Nat Neurosci 6, 330–332 (2003). https://doi.org/10.1038/nn0403-330
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DOI: https://doi.org/10.1038/nn0403-330
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