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Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder
INTRODUCTION: While the etiology of developmental coordination disorder (DCD) is yet to be established, brain-behavior modeling provides a cogent argument that neuropathology may subserve the motor difficulties typical of DCD. We argue that a number of the core behavioral features of the DCD profile...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5876243/ https://www.ncbi.nlm.nih.gov/pubmed/29628909 http://dx.doi.org/10.3389/fneur.2018.00179 |
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author | He, Jason L. Fuelscher, Ian Enticott, Peter G. Teo, Wei-peng Barhoun, Pamela Hyde, Christian |
author_facet | He, Jason L. Fuelscher, Ian Enticott, Peter G. Teo, Wei-peng Barhoun, Pamela Hyde, Christian |
author_sort | He, Jason L. |
collection | PubMed |
description | INTRODUCTION: While the etiology of developmental coordination disorder (DCD) is yet to be established, brain-behavior modeling provides a cogent argument that neuropathology may subserve the motor difficulties typical of DCD. We argue that a number of the core behavioral features of the DCD profile (such as poor surround inhibition, compromised motor inhibition, and the presence of mirror movements) are consistent with difficulties regulating inhibition within the primary motor cortex (M1). This study aimed to be the first account of the integrity of cortical inhibition in motor cortices in DCD. METHOD: The sample consisted of eight adults with DCD aged (18–30 years) and 10 aged matched neurotypical controls. Participants received a common battery of single and paired-pulse transcranial magnetic stimulation from which a series of neurophysiological measures classically used to measure intra- [e.g., short-interval cortical inhibition (SICI), long-interval cortical inhibition (LICI), and cortical silent period] and inter hemispheric [e.g., ipsilateral silent period (ISP)] cortical inhibition of the M1 at rest were recorded. RESULTS: While no group differences were observed for any measure of intrahemispheric cortical inhibition, individuals with DCD demonstrated significantly reduced interhemispheric cortical inhibition relative to controls, shown by consistently lower ISP(ratios). CONCLUSION: Our findings are consistent with the view that regulation of cortical inhibition of M1 activity may be atypical in individuals with DCD, indicating differential GABAergic operation. This effect, however, appears to be select to cortical inhibition. Importantly, our data support the notion that reduced interhemispheric M1 cortical inhibition may at least partly explain commonly reported difficulties with bimanual motor control in DCD. The neurochemical implications and limitations of this evidence will be discussed. |
format | Online Article Text |
id | pubmed-5876243 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-58762432018-04-06 Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder He, Jason L. Fuelscher, Ian Enticott, Peter G. Teo, Wei-peng Barhoun, Pamela Hyde, Christian Front Neurol Neuroscience INTRODUCTION: While the etiology of developmental coordination disorder (DCD) is yet to be established, brain-behavior modeling provides a cogent argument that neuropathology may subserve the motor difficulties typical of DCD. We argue that a number of the core behavioral features of the DCD profile (such as poor surround inhibition, compromised motor inhibition, and the presence of mirror movements) are consistent with difficulties regulating inhibition within the primary motor cortex (M1). This study aimed to be the first account of the integrity of cortical inhibition in motor cortices in DCD. METHOD: The sample consisted of eight adults with DCD aged (18–30 years) and 10 aged matched neurotypical controls. Participants received a common battery of single and paired-pulse transcranial magnetic stimulation from which a series of neurophysiological measures classically used to measure intra- [e.g., short-interval cortical inhibition (SICI), long-interval cortical inhibition (LICI), and cortical silent period] and inter hemispheric [e.g., ipsilateral silent period (ISP)] cortical inhibition of the M1 at rest were recorded. RESULTS: While no group differences were observed for any measure of intrahemispheric cortical inhibition, individuals with DCD demonstrated significantly reduced interhemispheric cortical inhibition relative to controls, shown by consistently lower ISP(ratios). CONCLUSION: Our findings are consistent with the view that regulation of cortical inhibition of M1 activity may be atypical in individuals with DCD, indicating differential GABAergic operation. This effect, however, appears to be select to cortical inhibition. Importantly, our data support the notion that reduced interhemispheric M1 cortical inhibition may at least partly explain commonly reported difficulties with bimanual motor control in DCD. The neurochemical implications and limitations of this evidence will be discussed. Frontiers Media S.A. 2018-03-23 /pmc/articles/PMC5876243/ /pubmed/29628909 http://dx.doi.org/10.3389/fneur.2018.00179 Text en Copyright © 2018 He, Fuelscher, Enticott, Teo, Barhoun and Hyde. https://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience He, Jason L. Fuelscher, Ian Enticott, Peter G. Teo, Wei-peng Barhoun, Pamela Hyde, Christian Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title | Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title_full | Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title_fullStr | Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title_full_unstemmed | Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title_short | Interhemispheric Cortical Inhibition Is Reduced in Young Adults With Developmental Coordination Disorder |
title_sort | interhemispheric cortical inhibition is reduced in young adults with developmental coordination disorder |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5876243/ https://www.ncbi.nlm.nih.gov/pubmed/29628909 http://dx.doi.org/10.3389/fneur.2018.00179 |
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