Heike Althen, Sabine Grimm and Carles Escera Simple and complex acoustic regularities are encoded at different levels of the auditory hierarchy European Journal of Neuroscience 38
Frequency-location deviants of an auditory feature-conjunction paradigm did not elicit any modulations of the Na, Pa or Nb auditory middle latency waves. In contrast, deviants of a frequency oddball paradigm elicited an enhancement of the Nb wave. These findings corroborate the notion that simple auditory regularities are encoded upstream to more complex auditory regularities and go in line with the idea of a hierarchically working auditory novelty system.
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