The dynamic imprint of word learning on the dorsal language pathway
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Título
The dynamic imprint of word learning on the dorsal language pathwayAutoría
Fecha de publicación
2017Editor
ElsevierISSN
1053-8119; 1095-9572Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
NeuroImage 159 (2017)Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
According to Hickok and Poeppel (2007), the acquisition of new vocabulary rests on the dorsal language pathway
connecting auditory and motor areas. The present study tested this hypothesis longitudinally by measuring ... [+]
According to Hickok and Poeppel (2007), the acquisition of new vocabulary rests on the dorsal language pathway
connecting auditory and motor areas. The present study tested this hypothesis longitudinally by measuring BOLD
signal changes during a verbal repetition task and modulation of resting state functional connectivity (rs-FC) in
the dorsal stream. Thirty-five healthy participants, divided into trained and control groups, completed fMRI
sessions on days 1, 10, and 24. Between days 1 and 10, the trained group learned 84 new pseudowords associated
with 84 native words. Task-related fMRI results showed a reduced activity in the IFG and STG while processing
the learned vocabulary after training, returning to initial values two weeks later. Moreover, rs-fMRI analysis
showed stronger rs-FC between the IFG and STG in the trained group than in the control group after learning,
especially on day 24. These neural changes were more evident in participants with a larger vocabulary. Discussion
focuses on the prominent role of the dorsal stream in vocabulary acquisition. Even when their meaning was
known, newly learned words were again processed through the dorsal stream two weeks after learning, with the
increase in rs-FC between auditory and motor areas being a relevant long-term imprint of vocabulary learning. [-]
Proyecto de investigación
APOSTD/2012068 ; CSD2007 0.0012 ; PSI2013-47504-R ; FPDI2013-17045 ; P1-1B2012-38Derechos de acceso
1053-8119/© 2017 Elsevier Inc. All rights reserved.
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