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.
Original language | English |
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Pages (from-to) | 739-751 |
Number of pages | 13 |
Journal | Language, Cognition and Neuroscience |
Volume | 35 |
Issue number | 6 |
Early online date | 26 Sept 2018 |
DOIs | |
Publication status | Published - 2 Jul 2020 |
Keywords
- Speech
- Entrainment
- Top-down
- Prediction
- Beta
- Delta