Word learning is mediated by the left arcuate fasciculus

Diana López-Barroso, Marco Catani, Pablo Ripollés, Flavio Dell'Acqua, Antoni Rodríguez-Fornells, Ruth De Diego-Balaguer

Research output: Contribution to journalArticle

Abstract

Human language requires constant learning of new words, leading to the acquisition of an average vocabulary of more than 30,000 words in adult life. The ability to learn new words is highly variable and may rely on the integration between auditory and motor information. Here, we combined diffusion imaging tractography and functional MRI to study whether the strength of anatomical and functional connectivity between auditory and motor language networks is associated with word learning ability. Our results showed that performance in word learning correlates with microstructural properties and strength of functional connectivity of the direct connections between Broca's andWernicke's territories in the left hemisphere. This study suggests that our ability to learn new words relies on an efficient and fast communication between temporal and frontal areas. The absence of these connections in other animals may explain the unique ability of learning words in humans.

Original languageEnglish (US)
Pages (from-to)13168-13173
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number32
DOIs
StatePublished - Aug 6 2013

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Keywords

  • Diffusion tensor imaging
  • Dorsal stream
  • Ventral stream
  • White matter

ASJC Scopus subject areas

  • General

Cite this

López-Barroso, D., Catani, M., Ripollés, P., Dell'Acqua, F., Rodríguez-Fornells, A., & De Diego-Balaguer, R. (2013). Word learning is mediated by the left arcuate fasciculus. Proceedings of the National Academy of Sciences of the United States of America, 110(32), 13168-13173. https://doi.org/10.1073/pnas.1301696110