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Disturbances of dynamic balance in phasic cervical dystonia.

Identifieur interne : 001391 ( Main/Exploration ); précédent : 001390; suivant : 001392

Disturbances of dynamic balance in phasic cervical dystonia.

Auteurs : J. Müller [Autriche] ; G. Ebersbach ; J. Wissel ; C. Brenneis ; L. Badry ; Werner Poewe [Autriche]

Source :

RBID : pubmed:10567505

Descripteurs français

English descriptors

Abstract

OBJECTIVE

To quantitatively assess control of balance under static and dynamic conditions in patients with tonic and phasic cervical dystonia.

METHODS

Ten patients with purely tonic cervical dystonia with fixed postural deviation and 20 patients with cervical dystonia with phasic head movements were investigated at least 3 months after botulinum toxin injections. Seventeen age matched volunteers served as controls. Static posturography was performed on a force platform; dynamic equilibrium was studied on a stabilometer, which requires the subject to continuously adapt upright posture to an unstable tilting surface. Measurements of maximum amplitude and linear displacement of the pivot were taken with open and closed eyes.

RESULTS

Sway path values in static posturography were not significantly different between patients with cervical dystonia and controls. On dynamic posturography, patients with phasic cervical dystonia showed significantly higher platform measures (maximum amplitude and linear displacement of the pivot) with eyes open and closed By contrast, none of the dynamic platform measures differed significantly between patients with tonic cervical dystonia and controls.

CONCLUSIONS

Normal measures of dynamic equilibrium in tonic cervical dystonia argue against a primary abnormality of balance control in cervical dystonia. Impaired dynamic equilibrium in phasic cervical dystonia is likely to reflect a disruption of vestibular input due to repetitive, involuntary head oscillations.


DOI: 10.1136/jnnp.67.6.807
PubMed: 10567505
PubMed Central: PMC1736666


Affiliations:


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Le document en format XML

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<name sortKey="Badry, L" sort="Badry, L" uniqKey="Badry L" first="L" last="Badry">L. Badry</name>
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<term>Adult (MeSH)</term>
<term>Aged (MeSH)</term>
<term>Cervical Vertebrae (physiopathology)</term>
<term>Dystonia (complications)</term>
<term>Dystonia (diagnosis)</term>
<term>Dystonia (physiopathology)</term>
<term>Female (MeSH)</term>
<term>Humans (MeSH)</term>
<term>Male (MeSH)</term>
<term>Middle Aged (MeSH)</term>
<term>Postural Balance (MeSH)</term>
<term>Posture (MeSH)</term>
<term>Sensation Disorders (complications)</term>
<term>Sensation Disorders (diagnosis)</term>
<term>Severity of Illness Index (MeSH)</term>
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<term>Dystonie (complications)</term>
<term>Dystonie (diagnostic)</term>
<term>Dystonie (physiopathologie)</term>
<term>Femelle (MeSH)</term>
<term>Humains (MeSH)</term>
<term>Indice de gravité de la maladie (MeSH)</term>
<term>Mâle (MeSH)</term>
<term>Posture (MeSH)</term>
<term>Sujet âgé (MeSH)</term>
<term>Troubles sensitifs (complications)</term>
<term>Troubles sensitifs (diagnostic)</term>
<term>Vertèbres cervicales (physiopathologie)</term>
<term>Équilibre postural (MeSH)</term>
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<term>Sensation Disorders</term>
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<front>
<div type="abstract" xml:lang="en">
<p>
<b>OBJECTIVE</b>
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<p>To quantitatively assess control of balance under static and dynamic conditions in patients with tonic and phasic cervical dystonia.</p>
</div>
<div type="abstract" xml:lang="en">
<p>
<b>METHODS</b>
</p>
<p>Ten patients with purely tonic cervical dystonia with fixed postural deviation and 20 patients with cervical dystonia with phasic head movements were investigated at least 3 months after botulinum toxin injections. Seventeen age matched volunteers served as controls. Static posturography was performed on a force platform; dynamic equilibrium was studied on a stabilometer, which requires the subject to continuously adapt upright posture to an unstable tilting surface. Measurements of maximum amplitude and linear displacement of the pivot were taken with open and closed eyes.</p>
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<b>RESULTS</b>
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<p>Sway path values in static posturography were not significantly different between patients with cervical dystonia and controls. On dynamic posturography, patients with phasic cervical dystonia showed significantly higher platform measures (maximum amplitude and linear displacement of the pivot) with eyes open and closed By contrast, none of the dynamic platform measures differed significantly between patients with tonic cervical dystonia and controls.</p>
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<div type="abstract" xml:lang="en">
<p>
<b>CONCLUSIONS</b>
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<p>Normal measures of dynamic equilibrium in tonic cervical dystonia argue against a primary abnormality of balance control in cervical dystonia. Impaired dynamic equilibrium in phasic cervical dystonia is likely to reflect a disruption of vestibular input due to repetitive, involuntary head oscillations.</p>
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