open access

Vol 47, No 3 (2013)
ARTYKUŁ ORYGINALNY
Submitted: 2012-05-13
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Tremor associated with focal and segmental dystonia

Monika Rudzińska, Małgorzata Krawczyk, Magdalena Wójcik-Pędziwiatr, Andrzej Szczudlik, Anna Wasielewska
DOI: 10.5114/ninp.2013.35584
·
Neurol Neurochir Pol 2013;47(3):223-231.

open access

Vol 47, No 3 (2013)
ARTYKUŁ ORYGINALNY
Submitted: 2012-05-13

Abstract

Background and purpose

Tremor occurs in 10–85% of patients with focal dystonia as so-called dystonic tremor or tremor associated with dystonia. The aim of this study was to assess the incidence and to characterize parameters of tremor accompanying focal and segmental dystonia.

Material and methods

One hundred and twenty-three patients with diagnosis of focal and segmental dystonia together with 51 healthy controls were included in the study. For each participant, clinical examination and objective assessment (accelerometer, electromyography, graphic tablet) of hand tremor was performed. Frequency and severity of tremor were assessed in three positions: at rest (rest tremor); with hands extended (postural tremor); during ‘finger-to-nose’ test and during Archimedes spiral drawing (kinetic tremor). Based on the mass load test, type of tremor was determined as essential tremor type or enhanced physiological type.

Results

The incidence of tremor was significantly higher in dystonic patients as compared to controls (p = 0.0001). In clinical examination, tremor was found in 50% of dystonic patients, and in instrumental assessment in an additional 10–20%. The most frequent type of tremor was postural and kinetic tremor with 7 Hz frequency and featured essential tremor type. In the control group, tremor was detected in about 10% of subjects as 9-Hz postural tremor of enhanced physiological tremor type. No differences were found between patients with different types of dystonia with respect to the tremor incidence, type and parameters (frequency and severity). No correlations between tremor severity and dystonia severity were found either.

Abstract

Background and purpose

Tremor occurs in 10–85% of patients with focal dystonia as so-called dystonic tremor or tremor associated with dystonia. The aim of this study was to assess the incidence and to characterize parameters of tremor accompanying focal and segmental dystonia.

Material and methods

One hundred and twenty-three patients with diagnosis of focal and segmental dystonia together with 51 healthy controls were included in the study. For each participant, clinical examination and objective assessment (accelerometer, electromyography, graphic tablet) of hand tremor was performed. Frequency and severity of tremor were assessed in three positions: at rest (rest tremor); with hands extended (postural tremor); during ‘finger-to-nose’ test and during Archimedes spiral drawing (kinetic tremor). Based on the mass load test, type of tremor was determined as essential tremor type or enhanced physiological type.

Results

The incidence of tremor was significantly higher in dystonic patients as compared to controls (p = 0.0001). In clinical examination, tremor was found in 50% of dystonic patients, and in instrumental assessment in an additional 10–20%. The most frequent type of tremor was postural and kinetic tremor with 7 Hz frequency and featured essential tremor type. In the control group, tremor was detected in about 10% of subjects as 9-Hz postural tremor of enhanced physiological tremor type. No differences were found between patients with different types of dystonia with respect to the tremor incidence, type and parameters (frequency and severity). No correlations between tremor severity and dystonia severity were found either.

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Keywords

focal dystonia, accompanying tremor, tremor parameters

About this article
Title

Tremor associated with focal and segmental dystonia

Journal

Neurologia i Neurochirurgia Polska

Issue

Vol 47, No 3 (2013)

Pages

223-231

DOI

10.5114/ninp.2013.35584

Bibliographic record

Neurol Neurochir Pol 2013;47(3):223-231.

Keywords

focal dystonia
accompanying tremor
tremor parameters

Authors

Monika Rudzińska
Małgorzata Krawczyk
Magdalena Wójcik-Pędziwiatr
Andrzej Szczudlik
Anna Wasielewska

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