Tracking training-related plasticity by combining fMRI and DTI : the right hemisphere ventral stream mediates musical syntax processing

Oechslin, Mathias S. (Faculty of Psychology and Educational Sciences, University of Geneva, Switzerland ; Department of Education and Culture of the Canton of Thurgau, Switzerland) ; Gschwind, Markus (Department of Neurology, Geneva University Hospitals, Switzerland ; Department of Neuroscience, Campus Biotech, University of Geneva, Switzerland) ; James, Clara Eline (Faculty of Psychology and Educational Sciences, University of Geneva, Switzerland ; Geneva Neuroscience Center, University of Geneva, Switzerland ; Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland)

As a functional homolog for left-hemispheric syntax processing in language, neuroimaging studies evidenced involvement of right prefrontal regions in musical syntax processing, of which underlying white matter connectivity remains unexplored so far. In the current experiment, we investigated the underlying pathway architecture in subjects with 3 levels of musical expertise. Employing diffusion tensor imaging tractography, departing from seeds from our previous functional magnetic resonance imaging study on music syntax processing in the same participants, we identified a pathway in the right ventral stream that connects the middle temporal lobe with the inferior frontal cortex via the extreme capsule, and corresponds to the left hemisphere ventral stream, classically attributed to syntax processing in language comprehension. Additional morphometric consistency analyses allowed dissociating tract core from more dispersed fiber portions. Musical expertise related to higher tract consistency of the right ventral stream pathway. Specifically, tract consistency in this pathway predicted the sensitivity for musical syntax violations. We conclude that enduring musical practice sculpts ventral stream architecture. Our results suggest that training-related pathway plasticity facilitates the right hemisphere ventral stream information transfer, supporting an improved sound-to-meaning mapping in music.


Mots-clés:
Type d'article:
scientifique
Faculté:
Santé
Ecole:
HEdS - Genève
Institut:
Aucun institut
Classification:
Santé
Date:
2018-04
Pagination:
10 p.
Publié dans:
Cerebral Cortex
Numérotation (vol. no.):
2018, vol. 28, no. 4, pp. 1209-1218
DOI:
ISSN:
1047-3211
Le document apparaît dans:

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 Notice créée le 2019-01-09, modifiée le 2019-10-07

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