MovDisordV3, PascalFrancis, Corpus, bibRecord, 002925

Involvement of the motor cortex in pseudochoreoathetosis

Identifieur interne : 002925 ( PascalFrancis/Corpus ); précédent : 002924; suivant : 002926

Involvement of the motor cortex in pseudochoreoathetosis

Auteurs : Lars Timmermann ; Joachim Gross ; Frank Schmitz ; Hans-Joachim Freund ; Alfons Schnitzler

Source :

Movement disorders [ 0885-3185 ] ; 2001.

RBID : Pascal:02-0050007

Descripteurs français

Pascal (Inist)
- Choréoathétose, Cortex moteur, Magnétoencéphalographie, Electromyographie, Membre supérieur, Main, Exploration, Etude cas, Adulte, Mâle, Femelle, Pseudochoréoathétose.

English descriptors

KwdEn :
- Adult, Case study, Choreoathetosis, Electromyography, Exploration, Female, Hand, Magnetoencephalography, Male, Motor cortex, Upper limb.

Abstract

The pathophysiological background of involuntary movements in pseudochoreoathetosis is unclear. We therefore recorded in four patients with pseudochoreoathetosis and in six age-matched controls cortical activity with a whole-head magnetoencephalography (MEG) system and surface EMGs from hand muscles. Subjects performed the following tasks: 1) rest, and 2) constant finger stretch during forearm elevation; controls additionally simulated pseudochoreoathetotic finger movements. During rest, the patients showed involuntary finger movements associated with excessive MEG-EMG coherence at frequencies between 6 and 20 Hz, whereas coherence in controls simulating pseudochoreoathetotic movements did not exceed noise level (P < 0.02). During finger stretch, MEG-EMG coherence in patients was similar to that of controls. Cortical sources of MEG-EMG coherence in patients were localized in the contralateral motor cortex. We conclude that pseudochoreoathetosis is associated with pathologically increased corticomuscular coherence and thus differs, neurophysiologically, from voluntarily simulated pseudochoreoathetotic movements. The enhanced MEG-EMG coherence in pseudochoreoathetosis probably reflects a pathologically strong motor cortical drive of spinal motorneurons after deafferentation.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 02-0050007 INIST
ET :	Involvement of the motor cortex in pseudochoreoathetosis
AU :	TIMMERMANN (Lars); GROSS (Joachim); SCHMITZ (Frank); FREUND (Hans-Joachim); SCHNITZLER (Alfons)
AF :	Department of Neurology, Heinrich-Heine University/Duesseldorf/Allemagne (1 aut., 2 aut., 3 aut., 4 aut., 5 aut.)
DT :	Publication en série; Niveau analytique
SO :	Movement disorders; ISSN 0885-3185; Etats-Unis; Da. 2001; Vol. 16; No. 5; Pp. 876-881; Bibl. 30 ref.
LA :	Anglais
EA :	The pathophysiological background of involuntary movements in pseudochoreoathetosis is unclear. We therefore recorded in four patients with pseudochoreoathetosis and in six age-matched controls cortical activity with a whole-head magnetoencephalography (MEG) system and surface EMGs from hand muscles. Subjects performed the following tasks: 1) rest, and 2) constant finger stretch during forearm elevation; controls additionally simulated pseudochoreoathetotic finger movements. During rest, the patients showed involuntary finger movements associated with excessive MEG-EMG coherence at frequencies between 6 and 20 Hz, whereas coherence in controls simulating pseudochoreoathetotic movements did not exceed noise level (P < 0.02). During finger stretch, MEG-EMG coherence in patients was similar to that of controls. Cortical sources of MEG-EMG coherence in patients were localized in the contralateral motor cortex. We conclude that pseudochoreoathetosis is associated with pathologically increased corticomuscular coherence and thus differs, neurophysiologically, from voluntarily simulated pseudochoreoathetotic movements. The enhanced MEG-EMG coherence in pseudochoreoathetosis probably reflects a pathologically strong motor cortical drive of spinal motorneurons after deafferentation.
CC :	002B17A01
FD :	Choréoathétose; Cortex moteur; Magnétoencéphalographie; Electromyographie; Membre supérieur; Main; Exploration; Etude cas; Adulte; Mâle; Femelle; Pseudochoréoathétose
FG :	Homme; Système nerveux pathologie; Mouvement involontaire; Trouble neurologique; Encéphale pathologie; Système nerveux central pathologie; Electrodiagnostic
ED :	Choreoathetosis; Motor cortex; Magnetoencephalography; Electromyography; Upper limb; Hand; Exploration; Case study; Adult; Male; Female
EG :	Human; Nervous system diseases; Involuntary movement; Neurological disorder; Cerebral disorder; Central nervous system disease; Electrodiagnosis
SD :	Coreoatetosis; Corteza motora; Magnetoencefalografía; Electromiografía; Miembro superior; Mano; Exploración; Estudio caso; Adulto; Macho; Hembra
LO :	INIST-20953.354000099256460100
ID :	02-0050007

Links to Exploration step

Pascal:02-0050007

Le document en format XML

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<s5>86</s5>
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<s5>38</s5>
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<s5>38</s5>
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<s5>39</s5>
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<s5>40</s5>
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<s5>40</s5>
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<s5>40</s5>
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<fC07 i1="06" i2="X" l="FRE"><s0>Système nerveux central pathologie</s0>
<s5>41</s5>
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<s5>41</s5>
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<fC07 i1="06" i2="X" l="SPA"><s0>Sistema nervosio central patología</s0>
<s5>41</s5>
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<s5>61</s5>
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<fC07 i1="07" i2="X" l="SPA"><s0>Electrodiagnóstico</s0>
<s5>61</s5>
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<server><NO>PASCAL 02-0050007 INIST</NO>
<ET>Involvement of the motor cortex in pseudochoreoathetosis</ET>
<AU>TIMMERMANN (Lars); GROSS (Joachim); SCHMITZ (Frank); FREUND (Hans-Joachim); SCHNITZLER (Alfons)</AU>
<AF>Department of Neurology, Heinrich-Heine University/Duesseldorf/Allemagne (1 aut., 2 aut., 3 aut., 4 aut., 5 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Movement disorders; ISSN 0885-3185; Etats-Unis; Da. 2001; Vol. 16; No. 5; Pp. 876-881; Bibl. 30 ref.</SO>
<LA>Anglais</LA>
<EA>The pathophysiological background of involuntary movements in pseudochoreoathetosis is unclear. We therefore recorded in four patients with pseudochoreoathetosis and in six age-matched controls cortical activity with a whole-head magnetoencephalography (MEG) system and surface EMGs from hand muscles. Subjects performed the following tasks: 1) rest, and 2) constant finger stretch during forearm elevation; controls additionally simulated pseudochoreoathetotic finger movements. During rest, the patients showed involuntary finger movements associated with excessive MEG-EMG coherence at frequencies between 6 and 20 Hz, whereas coherence in controls simulating pseudochoreoathetotic movements did not exceed noise level (P < 0.02). During finger stretch, MEG-EMG coherence in patients was similar to that of controls. Cortical sources of MEG-EMG coherence in patients were localized in the contralateral motor cortex. We conclude that pseudochoreoathetosis is associated with pathologically increased corticomuscular coherence and thus differs, neurophysiologically, from voluntarily simulated pseudochoreoathetotic movements. The enhanced MEG-EMG coherence in pseudochoreoathetosis probably reflects a pathologically strong motor cortical drive of spinal motorneurons after deafferentation.</EA>
<CC>002B17A01</CC>
<FD>Choréoathétose; Cortex moteur; Magnétoencéphalographie; Electromyographie; Membre supérieur; Main; Exploration; Etude cas; Adulte; Mâle; Femelle; Pseudochoréoathétose</FD>
<FG>Homme; Système nerveux pathologie; Mouvement involontaire; Trouble neurologique; Encéphale pathologie; Système nerveux central pathologie; Electrodiagnostic</FG>
<ED>Choreoathetosis; Motor cortex; Magnetoencephalography; Electromyography; Upper limb; Hand; Exploration; Case study; Adult; Male; Female</ED>
<EG>Human; Nervous system diseases; Involuntary movement; Neurological disorder; Cerebral disorder; Central nervous system disease; Electrodiagnosis</EG>
<SD>Coreoatetosis; Corteza motora; Magnetoencefalografía; Electromiografía; Miembro superior; Mano; Exploración; Estudio caso; Adulto; Macho; Hembra</SD>
<LO>INIST-20953.354000099256460100</LO>
<ID>02-0050007</ID>
</server>
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	Movement Disorders (revue)
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Movement Disorders (revue)

Involvement of the motor cortex in pseudochoreoathetosis

Involvement of the motor cortex in pseudochoreoathetosis

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