Exploring the early organization and maturation of linguistic pathways in the human infant brain
Jessica Dubois 1,2 , Cyril Poupon 3 , Bertrand Thirion 2,4 , Sofya Kulikova 5 , Franois Leroy 1,2 , Lucie Hertz-Pannier 5 , and Ghislaine Dehaene-Lambertz 1,2
Cognitive Neuroimaging Unit, INSERM,
CEA, Gif-sur-Yvette, France,
UNIRS, CEA, Gif-sur-Yvette, France,
INRIA, Gif-sur-Yvette, France,
UNIACT, U1129, INSERM-CEA, Gif-sur-Yvette, France
To understand how perisylvian regions collaborate from
the preterm period on, we investigated the development
of the language network bundles during the first stages
of language acquisition. Using diffusion imaging,
tractography and DTI parameters in 6- to 22w-old
infants, we demonstrated structural similarities between
infants and adults in the organization and
microstructure of white matter bundles, especially with
a segregation between dorsal and ventral pathways.
According to normalized transverse diffusivity, we
further highlighted the developmental calendar of these
bundles: the ventral pathway starts maturing before the
dorsal pathway, nevertheless the dorsal maturation
catches up during the first post-natal months.
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