The role of reward in word learning and its implications for language acquisition

Pablo Ripollés, Josep Marco-Pallarés, Ulrike Hielscher, Anna Mestres-Missé, Claus Tempelmann, Hans Jochen Heinze, Antoni Rodríguez-Fornells, Toemme Noesselt

Research output: Contribution to journalArticle

Abstract

Summary The exact neural processes behind humans' drive to acquire a new language - first as infants and later as second-language learners - are yet to be established. Recent theoretical models have proposed that during human evolution, emerging language-learning mechanisms might have been glued to phylogenetically older subcortical reward systems [1], reinforcing human motivation to learn a new language. Supporting this hypothesis, our results showed that adult participants exhibited robust fMRI activation in the ventral striatum (VS) - a core region of reward processing [2] - when successfully learning the meaning of new words. This activation was similar to the VS recruitment elicited using an independent reward task. Moreover, the VS showed enhanced functional and structural connectivity with neocortical language areas during successful word learning. Together, our results provide evidence for the neural substrate of reward and motivation during word learning. We suggest that this strong functional and anatomical coupling between neocortical language regions and the subcortical reward system provided a crucial advantage in humans that eventually enabled our lineage to successfully acquire linguistic skills.

Original languageEnglish (US)
Pages (from-to)2606-2611
Number of pages6
JournalCurrent Biology
Volume24
Issue number21
DOIs
StatePublished - Nov 3 2014

    Fingerprint

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Ripollés, P., Marco-Pallarés, J., Hielscher, U., Mestres-Missé, A., Tempelmann, C., Heinze, H. J., Rodríguez-Fornells, A., & Noesselt, T. (2014). The role of reward in word learning and its implications for language acquisition. Current Biology, 24(21), 2606-2611. https://doi.org/10.1016/j.cub.2014.09.044