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The speed-curvature power law in tongue movements of repetitive speech

The speed-curvature power law is a celebrated law of motor control expressing a relation between the kinematic property of speed and the geometric property of curvature. We aimed to assess whether speech movements obey this law just as movements from other domains do. We describe a metronome-driven...

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Detalles Bibliográficos
Autores principales: Kuberski, Stephan R., Gafos, Adamantios I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6422270/
https://www.ncbi.nlm.nih.gov/pubmed/30883586
http://dx.doi.org/10.1371/journal.pone.0213851
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author Kuberski, Stephan R.
Gafos, Adamantios I.
author_facet Kuberski, Stephan R.
Gafos, Adamantios I.
author_sort Kuberski, Stephan R.
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description The speed-curvature power law is a celebrated law of motor control expressing a relation between the kinematic property of speed and the geometric property of curvature. We aimed to assess whether speech movements obey this law just as movements from other domains do. We describe a metronome-driven speech elicitation paradigm designed to cover a wide range of speeds. We recorded via electromagnetic articulometry speech movements in sequences of the form /CV…/ from nine speakers (five German, four English) speaking at eight distinct rates. First, we demonstrate that the paradigm of metronome-driven manipulations results in speech movement data consistent with earlier reports on the kinematics of speech production. Second, analysis of our data in their full three-dimensions and using advanced numerical differentiation methods offers stronger evidence for the law than that reported in previous studies devoted to its assessment. Finally, we demonstrate the presence of a clear rate dependency of the power law’s parameters. The robustness of the speed-curvature relation in our datasets lends further support to the hypothesis that the power law is a general feature of human movement. We place our results in the context of other work in movement control and consider implications for models of speech production.
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spelling pubmed-64222702019-04-02 The speed-curvature power law in tongue movements of repetitive speech Kuberski, Stephan R. Gafos, Adamantios I. PLoS One Research Article The speed-curvature power law is a celebrated law of motor control expressing a relation between the kinematic property of speed and the geometric property of curvature. We aimed to assess whether speech movements obey this law just as movements from other domains do. We describe a metronome-driven speech elicitation paradigm designed to cover a wide range of speeds. We recorded via electromagnetic articulometry speech movements in sequences of the form /CV…/ from nine speakers (five German, four English) speaking at eight distinct rates. First, we demonstrate that the paradigm of metronome-driven manipulations results in speech movement data consistent with earlier reports on the kinematics of speech production. Second, analysis of our data in their full three-dimensions and using advanced numerical differentiation methods offers stronger evidence for the law than that reported in previous studies devoted to its assessment. Finally, we demonstrate the presence of a clear rate dependency of the power law’s parameters. The robustness of the speed-curvature relation in our datasets lends further support to the hypothesis that the power law is a general feature of human movement. We place our results in the context of other work in movement control and consider implications for models of speech production. Public Library of Science 2019-03-18 /pmc/articles/PMC6422270/ /pubmed/30883586 http://dx.doi.org/10.1371/journal.pone.0213851 Text en © 2019 Kuberski, Gafos http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Kuberski, Stephan R.
Gafos, Adamantios I.
The speed-curvature power law in tongue movements of repetitive speech
title The speed-curvature power law in tongue movements of repetitive speech
title_full The speed-curvature power law in tongue movements of repetitive speech
title_fullStr The speed-curvature power law in tongue movements of repetitive speech
title_full_unstemmed The speed-curvature power law in tongue movements of repetitive speech
title_short The speed-curvature power law in tongue movements of repetitive speech
title_sort speed-curvature power law in tongue movements of repetitive speech
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6422270/
https://www.ncbi.nlm.nih.gov/pubmed/30883586
http://dx.doi.org/10.1371/journal.pone.0213851
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