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Functional selectivity for face processing in the temporal voice area of early deaf individuals

View ORCID ProfileStefania Benetti, Markus J. van Ackeren, Giuseppe Rabini, Joshua Zonca, Valentina Foa, Francesca Baruffaldi, Mohamed Rezk, Francesco Pavani, Bruno Rossion, View ORCID ProfileOlivier Collignon
doi: https://doi.org/10.1101/154138
Stefania Benetti
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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  • For correspondence: stefania.benetti@unitn.it olivier.collignon@uclouvain.be
Markus J. van Ackeren
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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Giuseppe Rabini
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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Joshua Zonca
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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Valentina Foa
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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Francesca Baruffaldi
4Ente Nazionale Sordi, Sezione di Trento, Trento, Italy
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Mohamed Rezk
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
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Francesco Pavani
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
2Department of Psychology and Cognitive Sciences, University of Trento, Trento, Italy
5IMPACT, Centre de Recherche en Neuroscience de Lyon (CRNL), Lyon, France
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Bruno Rossion
3Institute of research in Psychology (IPSY) & Institute of Neuroscience (IoNS)- University of Louvain (UCL), Louvain, Belgium
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Olivier Collignon
1Center for Mind/Brain Studies, University of Trento, Trento, Italy
3Institute of research in Psychology (IPSY) & Institute of Neuroscience (IoNS)- University of Louvain (UCL), Louvain, Belgium
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Abstract

Brain systems supporting face and voice processing both contribute to the extraction of important information for social interaction (e.g., person identity). How does the brain reorganize when one of these channels is absent? Here we explore this question by combining behavioral and multimodal neuroimaging measures (magneto-encephalography and functional imaging) in a group of early deaf humans. We show enhanced selective neural response for faces and for individual face coding in a specific region of the auditory cortex that is typically specialized for voice perception in hearing individuals. In this region, selectivity to face signals emerges early in the visual processing hierarchy, shortly following typical face-selective responses in the ventral visual pathway. Functional and effective connectivity analyses suggest reorganization in long-range connections from early visual areas to the face-selective temporal area in individuals with early and profound deafness. Altogether, these observations demonstrate that regions that typically specialize for voice processing in the hearing brain preferentially reorganize for face processing in born deaf people. Our results support the idea that cross-modal plasticity in case of early sensory deprivation relates to the original functional specialization of the reorganized brain regions.

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Posted June 23, 2017.
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Functional selectivity for face processing in the temporal voice area of early deaf individuals
Stefania Benetti, Markus J. van Ackeren, Giuseppe Rabini, Joshua Zonca, Valentina Foa, Francesca Baruffaldi, Mohamed Rezk, Francesco Pavani, Bruno Rossion, Olivier Collignon
bioRxiv 154138; doi: https://doi.org/10.1101/154138
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Functional selectivity for face processing in the temporal voice area of early deaf individuals
Stefania Benetti, Markus J. van Ackeren, Giuseppe Rabini, Joshua Zonca, Valentina Foa, Francesca Baruffaldi, Mohamed Rezk, Francesco Pavani, Bruno Rossion, Olivier Collignon
bioRxiv 154138; doi: https://doi.org/10.1101/154138

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