Movement Disorders (revue)

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Involuntary painful muscle contractions in satoyoshi syndrome : A surface electromyographic study

Identifieur interne : 001430 ( PascalFrancis/Curation ); précédent : 001429; suivant : 001431

Involuntary painful muscle contractions in satoyoshi syndrome : A surface electromyographic study

Auteurs : Gea Drost [Pays-Bas] ; Aad Verrips [Pays-Bas] ; Baziel G. M. Van Engelen [Pays-Bas] ; Dick F. Stegeman [Pays-Bas] ; Machiel J. Zwarts [Pays-Bas]

Source :

RBID : Pascal:07-0021740

Descripteurs français

English descriptors

Abstract

We report a child with Satoyoshi syndrome manifested by involuntary painful muscle contractions and alopecia. Although an autoimmune origin of Satoyoshi syndrome seems likely, its exact etiology remains as yet unknown, as is the origin of the involuntary contractions. To gain a better understanding of the electrophysiological characteristics of the involuntary contractions, we performed a surface electromyographic (EMG) study. We investigated muscle contractions in the legs using two noninvasive techniques: high-density surface EMG (HD-sEMG) recordings on one muscle, and polymyographic surface EMG (sEMG) recordings on various muscles. During the involuntary contractions, HD-sEMG showed a fourfold increase in amplitude compared to maximal voluntary contractions. These high potentials were widely distributed across the whole muscle and showed a pronounced oscillatory behavior with a frequency around 45 Hz. Polymyographic sEMG revealed that the involuntary contractions often occur simultaneously in various muscles or showed a switch of activity from one muscle to another. These findings point to hyperactivity or a disinhibition at the alpha motor neuron level, originating probably at that level, although a central origin cannot be excluded.
pA  
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A03   1    @0 Mov. disord.
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A08 01  1  ENG  @1 Involuntary painful muscle contractions in satoyoshi syndrome : A surface electromyographic study
A11 01  1    @1 DROST (Gea)
A11 02  1    @1 VERRIPS (Aad)
A11 03  1    @1 VAN ENGELEN (Baziel G. M.)
A11 04  1    @1 STEGEMAN (Dick F.)
A11 05  1    @1 ZWARTS (Machiel J.)
A14 01      @1 Department of Clinical Neurophysiology, Institute of Neurology, Radboud University Nijmegen Medical Centre @2 Nijmegen @3 NLD @Z 1 aut. @Z 4 aut. @Z 5 aut.
A14 02      @1 Neuromuscular Centre Nijmegen, Institute of Neurology, Radboud University Nijmegen Medical Centre @2 Nijmegen @3 NLD @Z 1 aut. @Z 3 aut. @Z 4 aut. @Z 5 aut.
A14 03      @1 Canisius Wilhelmina Hospital @2 Nijmegen @3 NLD @Z 2 aut.
A20       @1 2015-2018
A21       @1 2006
A23 01      @0 ENG
A43 01      @1 INIST @2 20953 @5 354000158935070370
A44       @0 0000 @1 © 2007 INIST-CNRS. All rights reserved.
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A60       @1 P @3 CC
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A64 01  1    @0 Movement disorders
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C01 01    ENG  @0 We report a child with Satoyoshi syndrome manifested by involuntary painful muscle contractions and alopecia. Although an autoimmune origin of Satoyoshi syndrome seems likely, its exact etiology remains as yet unknown, as is the origin of the involuntary contractions. To gain a better understanding of the electrophysiological characteristics of the involuntary contractions, we performed a surface electromyographic (EMG) study. We investigated muscle contractions in the legs using two noninvasive techniques: high-density surface EMG (HD-sEMG) recordings on one muscle, and polymyographic surface EMG (sEMG) recordings on various muscles. During the involuntary contractions, HD-sEMG showed a fourfold increase in amplitude compared to maximal voluntary contractions. These high potentials were widely distributed across the whole muscle and showed a pronounced oscillatory behavior with a frequency around 45 Hz. Polymyographic sEMG revealed that the involuntary contractions often occur simultaneously in various muscles or showed a switch of activity from one muscle to another. These findings point to hyperactivity or a disinhibition at the alpha motor neuron level, originating probably at that level, although a central origin cannot be excluded.
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C03 01  X  SPA  @0 Sistema nervioso patología @5 01
C03 02  X  FRE  @0 Douleur @5 09
C03 02  X  ENG  @0 Pain @5 09
C03 02  X  SPA  @0 Dolor @5 09
C03 03  X  FRE  @0 Contraction musculaire @5 10
C03 03  X  ENG  @0 Muscle contraction @5 10
C03 03  X  SPA  @0 Contracción muscular @5 10
C03 04  X  FRE  @0 Electromyographie @5 11
C03 04  X  ENG  @0 Electromyography @5 11
C03 04  X  SPA  @0 Electromiografía @5 11
C07 01  X  FRE  @0 Electrophysiologie @5 37
C07 01  X  ENG  @0 Electrophysiology @5 37
C07 01  X  SPA  @0 Electrofisiología @5 37
N21       @1 010
N44 01      @1 OTO
N82       @1 OTO

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Pascal:07-0021740

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<div type="abstract" xml:lang="en">We report a child with Satoyoshi syndrome manifested by involuntary painful muscle contractions and alopecia. Although an autoimmune origin of Satoyoshi syndrome seems likely, its exact etiology remains as yet unknown, as is the origin of the involuntary contractions. To gain a better understanding of the electrophysiological characteristics of the involuntary contractions, we performed a surface electromyographic (EMG) study. We investigated muscle contractions in the legs using two noninvasive techniques: high-density surface EMG (HD-sEMG) recordings on one muscle, and polymyographic surface EMG (sEMG) recordings on various muscles. During the involuntary contractions, HD-sEMG showed a fourfold increase in amplitude compared to maximal voluntary contractions. These high potentials were widely distributed across the whole muscle and showed a pronounced oscillatory behavior with a frequency around 45 Hz. Polymyographic sEMG revealed that the involuntary contractions often occur simultaneously in various muscles or showed a switch of activity from one muscle to another. These findings point to hyperactivity or a disinhibition at the alpha motor neuron level, originating probably at that level, although a central origin cannot be excluded.</div>
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