Predictive entrainment of natural speech through two fronto-motor top-down channels

Research output: Contribution to journalArticle

Authors

External organisations

  • University of Glasgow
  • University of Münster

Abstract

Natural communication between interlocutors is enabled by the ability to predict upcoming speech in a given context. Previously we showed that these predictions rely on a fronto-motor top-down control of low-frequency oscillations in auditory-temporal brain areas that track intelligible speech. However, a comprehensive spatio-temporal characterisation of this effect is still missing. Here, we applied transfer entropy to source-localised MEG data during continuous speech perception. First, at low frequencies (1-4 Hz, brain delta phase to speech delta phase), predictive effects start in left fronto-motor regions and progress to right temporal regions. Second, at higher frequencies (14-18 Hz, brain beta power to speech delta phase), predictive patterns show a transition from left inferior frontal gyrus via left precentral gyrus to left primary auditory areas. Our results suggest a progression of prediction processes from higher-order to early sensory areas in at least two different frequency channels.

Details

Original languageEnglish
JournalLanguage, Cognition and Neuroscience
Publication statusPublished - 26 Sep 2018

Keywords

  • Speech, Entrainment, Top-down, Prediction, Beta, Delta