Neural mechanisms of auditory categorization: From across brain areas to within local microcircuits

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Abstract

Categorization enables listeners to efficiently encode and respond to auditory stimuli. Behavioral evidence for auditory categorization has been well documented across a broad range of human and non-human animal species. Moreover, neural correlates of auditory categorization have been documented in a variety of different brain regions in the ventral auditory pathway, which is thought to underlie auditory-object processing and auditory perception. Here, we review and discuss how neural representations of auditory categories are transformed across different scales of neural organization in the ventral auditory pathway: from across different brain areas to within local microcircuits. We propose different neural transformations across different scales of neural organization in auditory categorization. Along the ascending auditory system in the ventral pathway, there is a progression in the encoding of categories from simple acoustic categories to categories for abstract information. On the other hand, in local microcircuits, different classes of neurons differentially compute categorical information. © 2014 Tsunada and Cohen.

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Tsunada, J., & Cohen, Y. E. (2014). Neural mechanisms of auditory categorization: From across brain areas to within local microcircuits. Frontiers in Neuroscience. Frontiers Research Foundation. https://doi.org/10.3389/fnins.2014.00161

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