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A fNIRS Investigation of Speech Planning and Execution in Adults Who Stutter

Jackson, Eric S.; Wijeakumar, Sobana; Beal, Deryk S.; Brown, Bryan; Zebrowski, Patricia; Spencer, John P.

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Authors

Eric S. Jackson

Deryk S. Beal

Bryan Brown

Patricia Zebrowski

John P. Spencer



Abstract

© 2019 IBRO Our study aimed to determine the neural correlates of speech planning and execution in adults who stutter (AWS). Fifteen AWS and 15 controls (CON) completed two tasks that either manipulated speech planning or execution processing loads. Functional near-infrared spectroscopy (fNIRS) was used to measure changes in blood flow concentrations during each task, thus providing an indirect measure of neural activity. An image-based reconstruction technique was used to analyze the results and facilitate their interpretation in the context of previous functional neuroimaging studies of AWS that used positron emission tomography (PET) or functional magnetic resonance imaging (fMRI). For planning, we compared neural activity associated with high versus low planning load in AWS and CON. For execution, we compared the neural activity associated with overt versus covert naming in AWS and CON. Broadly, group level effects corroborate previous PET/fMRI findings including under-activation in left-hemisphere perisylvian speech-language networks and over-activation in right-hemisphere homologs. Increased planning load revealed atypical left-hemisphere activation in AWS, whereas increased execution load yielded atypical right fronto-temporo-parietal and bilateral motor activation in AWS. Our results add to the limited literature differentiating speech planning versus execution processes in AWS.

Citation

Jackson, E. S., Wijeakumar, S., Beal, D. S., Brown, B., Zebrowski, P., & Spencer, J. P. (2019). A fNIRS Investigation of Speech Planning and Execution in Adults Who Stutter. Neuroscience, 406, 73-85. https://doi.org/10.1016/j.neuroscience.2019.02.032

Journal Article Type Article
Acceptance Date Feb 26, 2019
Online Publication Date Mar 6, 2019
Publication Date May 15, 2019
Deposit Date Mar 10, 2020
Publicly Available Date Mar 29, 2024
Journal Neuroscience
Print ISSN 0306-4522
Electronic ISSN 1873-7544
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 406
Pages 73-85
DOI https://doi.org/10.1016/j.neuroscience.2019.02.032
Keywords General Neuroscience
Public URL https://nottingham-repository.worktribe.com/output/3828078
Publisher URL https://doi.org/10.1016/j.neuroscience.2019.02.032

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