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Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation
BACKGROUND: Integration of afferent somatosensory input with motor-cortex output is essential for accurate movements. Prior studies have shown that tactile input modulates motor-cortex excitability, which is reflected in the reactivity of the ∽20-Hz motor-cortex rhythm. ∽20-Hz rebound is connected t...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BlackWell Publishing Ltd
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4396160/ https://www.ncbi.nlm.nih.gov/pubmed/25874163 http://dx.doi.org/10.1002/brb3.328 |
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author | Parkkonen, Eeva Laaksonen, Kristina Piitulainen, Harri Parkkonen, Lauri Forss, Nina |
author_facet | Parkkonen, Eeva Laaksonen, Kristina Piitulainen, Harri Parkkonen, Lauri Forss, Nina |
author_sort | Parkkonen, Eeva |
collection | PubMed |
description | BACKGROUND: Integration of afferent somatosensory input with motor-cortex output is essential for accurate movements. Prior studies have shown that tactile input modulates motor-cortex excitability, which is reflected in the reactivity of the ∽20-Hz motor-cortex rhythm. ∽20-Hz rebound is connected to inhibition or deactivation of motor cortex whereas suppression has been associated with increased motor cortex activity. Although tactile sense carries important information for controlling voluntary actions, proprioception likely provides the most essential feedback for motor control. METHODS: To clarify how passive movement modulates motor-cortex excitability, we studied with magnetoencephalography (MEG) the amplitudes and peak latencies of suppression and rebound of the ∽20-Hz rhythm elicited by tactile stimulation and passive movement of right and left index fingers in 22 healthy volunteers. RESULTS: Passive movement elicited a stronger and more robust ∽20-Hz rebound than tactile stimulation. In contrast, the suppression amplitudes did not differ between the two stimulus types. CONCLUSION: Our findings suggest that suppression and rebound represent activity of two functionally distinct neuronal populations. The ∽20-Hz rebound to passive movement could be a suitable tool to study the functional state of the motor cortex both in healthy subjects and in patients with motor disorders. |
format | Online Article Text |
id | pubmed-4396160 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BlackWell Publishing Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-43961602015-04-14 Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation Parkkonen, Eeva Laaksonen, Kristina Piitulainen, Harri Parkkonen, Lauri Forss, Nina Brain Behav Original Research BACKGROUND: Integration of afferent somatosensory input with motor-cortex output is essential for accurate movements. Prior studies have shown that tactile input modulates motor-cortex excitability, which is reflected in the reactivity of the ∽20-Hz motor-cortex rhythm. ∽20-Hz rebound is connected to inhibition or deactivation of motor cortex whereas suppression has been associated with increased motor cortex activity. Although tactile sense carries important information for controlling voluntary actions, proprioception likely provides the most essential feedback for motor control. METHODS: To clarify how passive movement modulates motor-cortex excitability, we studied with magnetoencephalography (MEG) the amplitudes and peak latencies of suppression and rebound of the ∽20-Hz rhythm elicited by tactile stimulation and passive movement of right and left index fingers in 22 healthy volunteers. RESULTS: Passive movement elicited a stronger and more robust ∽20-Hz rebound than tactile stimulation. In contrast, the suppression amplitudes did not differ between the two stimulus types. CONCLUSION: Our findings suggest that suppression and rebound represent activity of two functionally distinct neuronal populations. The ∽20-Hz rebound to passive movement could be a suitable tool to study the functional state of the motor cortex both in healthy subjects and in patients with motor disorders. BlackWell Publishing Ltd 2015-05 2015-03-31 /pmc/articles/PMC4396160/ /pubmed/25874163 http://dx.doi.org/10.1002/brb3.328 Text en © 2015 The Authors. Brain and Behavior published by Wiley Periodicals, Inc. http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Parkkonen, Eeva Laaksonen, Kristina Piitulainen, Harri Parkkonen, Lauri Forss, Nina Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title | Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title_full | Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title_fullStr | Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title_full_unstemmed | Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title_short | Modulation of the ∽20-Hz motor-cortex rhythm to passive movement and tactile stimulation |
title_sort | modulation of the ∽20-hz motor-cortex rhythm to passive movement and tactile stimulation |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4396160/ https://www.ncbi.nlm.nih.gov/pubmed/25874163 http://dx.doi.org/10.1002/brb3.328 |
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