Mean-based neural coding of voices

Andics, Attila and McQueen, J. M. and Petersson, K. M. (2013) Mean-based neural coding of voices. NEUROIMAGE, 79. pp. 351-360. ISSN 1053-8119

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The social significance of recognizing the person who talks to us is obvious, but the neural mechanisms that mediate talker identification are unclear. Regions along the bilateral superior temporal sulcus (STS) and the inferior frontal cortex (IFC) of the human brain are selective for voices, and they are sensitive to rapid voice changes. Although it has been proposed that voice recognition is supported by prototype-centered voice representations, the involvement of these category-selective cortical regions in the neural coding of such "mean voices" has not previously been demonstrated. Using fMRI in combination with a voice identity learning paradigm, we show that voice-selective regions are involved in the mean-based coding of voice identities. Voice typicality is encoded on a supra-individual level in the right STS along a stimulus-dependent, identity-independent (i.e., voice-acoustic) dimension, and on an intra-individual level in the right IFC along a stimulus-independent, identity-dependent (i.e., voice identity) dimension. Voice recognition therefore entails at least two anatomically separable stages, each characterized by neural mechanisms that reference the central tendencies of voice categories. © 2013 Elsevier Inc.

Item Type: Article
Uncontrolled Keywords: voice change; voice analysis; task performance; speech discrimination; response time; priority journal; normal human; neuroimaging; nervous system function; human experiment; human; functional magnetic resonance imaging; frontal cortex; Female; brain region; BOLD signal; auditory stimulation; auditory feedback; auditory discrimination; ARTICLE; Adult; Voice identity learning; SUPERIOR TEMPORAL SULCUS; Prototype-centered representations; Inferior frontal cortex; FMRI
Subjects: Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
Depositing User: MTMT SWORD
Date Deposited: 07 Feb 2014 02:51
Last Modified: 07 Feb 2014 02:51

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