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White matter connectivity between occipital and temporal regions involved in face and voice processing in hearing and early deaf individuals

View ORCID ProfileStefania Benetti, Lisa Novello, Chiara Maffei, Giuseppe Rabini, Jorge Jovicich, View ORCID ProfileOlivier Collignon
doi: https://doi.org/10.1101/339713
Stefania Benetti
1Center for Mind/Brain Studies, University of Trento, 38123 Trento, Italy
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  • ORCID record for Stefania Benetti
  • For correspondence: stefania.benetti@unitn.it
Lisa Novello
1Center for Mind/Brain Studies, University of Trento, 38123 Trento, Italy
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Chiara Maffei
2Athinoula A. Martinos Center, Massachusetts General Hospital, Charlestown, MA 01129, USA
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Giuseppe Rabini
1Center for Mind/Brain Studies, University of Trento, 38123 Trento, Italy
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Jorge Jovicich
1Center for Mind/Brain Studies, University of Trento, 38123 Trento, Italy
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Olivier Collignon
1Center for Mind/Brain Studies, University of Trento, 38123 Trento, Italy
3Institute of Research in Psychology (IPSY) and in Neuroscience (IoNS), University of Louvain, 1348 Louvain-la-Neuve, Belgium
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  • For correspondence: olivier.collignon@uclouvain.be
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Abstract

Neuroplasticity following sensory deprivation has long inspired neuroscience research in the quest of understanding how sensory experience and genetics interact in developing the brain functional and structural architecture. Many studies have shown that sensory deprivation can lead to cross-modal functional recruitment of sensory deprived cortices. Little is known however about how structural reorganization may support these functional changes. In this study, we examined early deaf, hearing signer and hearing non-signer individuals using diffusion MRI to evaluate the potential structural connectivity linked to the functional recruitment of the temporal voice area by face stimuli in deaf individuals. More specifically, we characterized the structural connectivity between occipital, fusiform and temporal regions typically supporting voice- and face-selective processing. Despite the extensive functional reorganization for face processing in the temporal cortex of the deaf, macroscopic properties of these connections did not differ across groups. However, both occipito- and fusiform-temporal connections showed significant microstructural changes between groups (fractional anisotropy reduction, radial diffusivity increase). We propose that the reorganization of temporal regions after early auditory deprivation builds on intrinsic and mainly preserved anatomical connectivity between functionally specific temporal and occipital regions.

  • Macrostructural connectivity of the face-voice system is preserved in early deafness

  • Early deafness impacts on the microstructural connectivity of the face-voice system

  • Both genetics and experience shape structural connections in the face-voice system

  • Innate anatomical networks might constrain the expression of cross-modal plasticity

STG
Superior Temporal Gyrus
STS
Superior Temporal Sulcus
pSTS
Posterior superior Temporal Sulcus
FFA
Face-fusiform Area
V2/3
Boundary between Extrastriate V2 and V3 Areas
TVA
Temporal Voice-sensitive Area
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Posted June 06, 2018.
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White matter connectivity between occipital and temporal regions involved in face and voice processing in hearing and early deaf individuals
Stefania Benetti, Lisa Novello, Chiara Maffei, Giuseppe Rabini, Jorge Jovicich, Olivier Collignon
bioRxiv 339713; doi: https://doi.org/10.1101/339713
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White matter connectivity between occipital and temporal regions involved in face and voice processing in hearing and early deaf individuals
Stefania Benetti, Lisa Novello, Chiara Maffei, Giuseppe Rabini, Jorge Jovicich, Olivier Collignon
bioRxiv 339713; doi: https://doi.org/10.1101/339713

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