Long-term measurement of tremor.
Identifieur interne : 004326 ( PubMed/Corpus ); précédent : 004325; suivant : 004327Long-term measurement of tremor.
Auteurs : S. Spieker ; A. Boose ; S. Breit ; J. DichgansSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 1998.
English descriptors
- KwdEn :
- MESH :
- diagnosis : Parkinson Disease, Tremor.
- Diagnosis, Differential, Electromyography, Fourier Analysis, Humans, Time Factors.
Abstract
To account for the fluctuating and context-dependent nature of tremor, the method of ambulatory long-term electromyography (EMG) was developed for quantification of this symptom. It is based on successive evaluation of 15-s intervals by using a fast Fourier transformation (FFT). The standard results obtained are (a) tremor occurrence, a measure of how many intervals contain tremor; (b) mean tremor intensity; and (v) mean tremor frequency. This new method fulfills the so-called "test criteria" such as reliability, validity, sensitivity, and specificity for tremor quantification in essential tremor (ET) and Parkinson's disease (PD). In addition, we developed a method of determining the antagonist activation pattern by using cross-correlation analysis, also based on the long-term approach. This allows differentiation between ET and PD with a high sensitivity and a high interrater reliability. We conclude that long-term EMG is useful for both quantification and differentiation of tremor.
PubMed: 9827600
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pubmed:9827600Le document en format XML
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<author><name sortKey="Boose, A" sort="Boose, A" uniqKey="Boose A" first="A" last="Boose">A. Boose</name>
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<author><name sortKey="Breit, S" sort="Breit, S" uniqKey="Breit S" first="S" last="Breit">S. Breit</name>
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<author><name sortKey="Dichgans, J" sort="Dichgans, J" uniqKey="Dichgans J" first="J" last="Dichgans">J. Dichgans</name>
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<author><name sortKey="Breit, S" sort="Breit, S" uniqKey="Breit S" first="S" last="Breit">S. Breit</name>
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<author><name sortKey="Dichgans, J" sort="Dichgans, J" uniqKey="Dichgans J" first="J" last="Dichgans">J. Dichgans</name>
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<series><title level="j">Movement disorders : official journal of the Movement Disorder Society</title>
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<term>Time Factors</term>
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<keywords scheme="MESH" xml:lang="en"><term>Diagnosis, Differential</term>
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<front><div type="abstract" xml:lang="en">To account for the fluctuating and context-dependent nature of tremor, the method of ambulatory long-term electromyography (EMG) was developed for quantification of this symptom. It is based on successive evaluation of 15-s intervals by using a fast Fourier transformation (FFT). The standard results obtained are (a) tremor occurrence, a measure of how many intervals contain tremor; (b) mean tremor intensity; and (v) mean tremor frequency. This new method fulfills the so-called "test criteria" such as reliability, validity, sensitivity, and specificity for tremor quantification in essential tremor (ET) and Parkinson's disease (PD). In addition, we developed a method of determining the antagonist activation pattern by using cross-correlation analysis, also based on the long-term approach. This allows differentiation between ET and PD with a high sensitivity and a high interrater reliability. We conclude that long-term EMG is useful for both quantification and differentiation of tremor.</div>
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<Title>Movement disorders : official journal of the Movement Disorder Society</Title>
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<Abstract><AbstractText>To account for the fluctuating and context-dependent nature of tremor, the method of ambulatory long-term electromyography (EMG) was developed for quantification of this symptom. It is based on successive evaluation of 15-s intervals by using a fast Fourier transformation (FFT). The standard results obtained are (a) tremor occurrence, a measure of how many intervals contain tremor; (b) mean tremor intensity; and (v) mean tremor frequency. This new method fulfills the so-called "test criteria" such as reliability, validity, sensitivity, and specificity for tremor quantification in essential tremor (ET) and Parkinson's disease (PD). In addition, we developed a method of determining the antagonist activation pattern by using cross-correlation analysis, also based on the long-term approach. This allows differentiation between ET and PD with a high sensitivity and a high interrater reliability. We conclude that long-term EMG is useful for both quantification and differentiation of tremor.</AbstractText>
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