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      Coordination patterns in Essential Tremor patients with Deep Brain Stimulation: Syllables with low and high complexity

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          Abstract

          This study investigated syllable coordination patterns in Essential Tremor (ET) patients treated with Deep Brain Stimulation (DBS) by using electromagnetic articulography. We analyzed articulatory timing patterns for nine ET patients with activated and inactivated DBS and compared them to a group of healthy age-matched controls. We focused on timing patterns among gestures in syllables with low and high complexity in natural sentence production (simple CV versus complex CCV syllables). These articulatory patterns were interpreted in the framework of a coupled oscillator planning model of speech timing. In simple CV syllables, ET patients did show a similar coordination pattern to healthy control speakers. However, when complexity increased, the patients showed deviant coordination patterns for complex CCV syllables. These deviant patterns even aggravated under activated stimulation. We were able to show that the behavior of the speech system changes when the stimulation was activated, inducing a change in the dynamical system the ET patients have to adapt to. We conclude that coordination problems are not categorical but gradient in nature, pointing to the fact that there are dynamic mechanisms of regulation behind phonetic realization of phonological syllable parses.

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          Consensus Statement on the classification of tremors. from the task force on tremor of the International Parkinson and Movement Disorder Society.

          Consensus criteria for classifying tremor disorders were published by the International Parkinson and Movement Disorder Society in 1998. Subsequent advances with regard to essential tremor, tremor associated with dystonia, and other monosymptomatic and indeterminate tremors make a significant revision necessary.
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              Explaining Phonetic Variation: A Sketch of the H&H Theory

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                Author and article information

                Contributors
                Journal
                1868-6354
                Laboratory Phonology: Journal of the Association for Laboratory Phonology
                Ubiquity Press
                1868-6354
                27 March 2019
                2019
                : 10
                : 1
                : 6
                Affiliations
                [1 ]IfL – Phonetics, University of Cologne, DE
                [2 ]Department of Neurology, University Hospital Cologne, DE
                Article
                10.5334/labphon.141
                3eca1a4c-0729-416a-8196-74214026b9c8
                Copyright: © 2019 The Author(s)

                This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.

                History
                : 31 January 2018
                : 19 February 2019
                Categories
                Journal article

                Applied linguistics,General linguistics,Linguistics & Semiotics
                inefficient coordination patterns,dynamical disease,Deep Brain Stimulation,Essential Tremor,Syllable coordination patterns

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