Corsini, A. orcid.org/0009-0008-1069-2940, Tomassini, A. orcid.org/0000-0003-2986-020X, Pastore, A. et al. (3 more authors) (2024) Speech perception difficulty modulates theta-band encoding of articulatory synergies. Journal of Neurophysiology, 131 (3). pp. 480-491. ISSN 0022-3077
Abstract
The human brain tracks available speech acoustics and extrapolates missing information such as the speaker’s articulatory patterns. However, the extent to which articulatory reconstruction supports speech perception remains unclear. This study explores the relationship between articulatory reconstruction and task difficulty. Participants listened to sentences and performed a speech-rhyming task. Real kinematic data of the speaker’s vocal tract were recorded via electromagnetic articulography (EMA) and aligned to corresponding acoustic outputs. We extracted articulatory synergies from the EMA data with principal component analysis (PCA) and employed partial information decomposition (PID) to separate the electroencephalographic (EEG) encoding of acoustic and articulatory features into unique, redundant, and synergistic atoms of information. We median-split sentences into easy (ES) and hard (HS) based on participants’ performance and found that greater task difficulty involved greater encoding of unique articulatory information in the theta band. We conclude that fine-grained articulatory reconstruction plays a complementary role in the encoding of speech acoustics, lending further support to the claim that motor processes support speech perception.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 the American Physiological Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | articulatory synergies; EEG; mutual information; partial information decomposition; speech entrainment |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biomedical Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Mar 2024 12:23 |
Last Modified: | 07 Feb 2025 01:14 |
Status: | Published |
Publisher: | American Physiological Society |
Identification Number: | 10.1152/jn.00388.2023 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:210706 |