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Related Experiment Videos

Head tremor in cervical dystonia.

P K Pal1, A Samii, M Schulzer

  • 1Neurodegenerative Disorders Centre, Vancouver Hospital & Health Sciences Centre, University of British Columbia, Canada.

The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
|June 1, 2000
PubMed
Summary

Head tremor is common in cervical dystonia (CD), often appearing with hand tremor and a family history of tremor. This suggests a potential genetic link between CD and essential tremor (ET).

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Area of Science:

  • Neurology
  • Movement Disorders
  • Genetics

Background:

  • Cervical dystonia (CD) is a movement disorder characterized by involuntary muscle contractions in the neck.
  • The presence and clinical significance of head tremor in CD patients are not fully understood.
  • Comparing CD patients with and without head tremor can elucidate distinct clinical features and potential underlying mechanisms.

Purpose of the Study:

  • To compare the clinical characteristics, natural history, and therapeutic outcomes of cervical dystonia patients with head tremor (HT+) versus those without head tremor (HT-).
  • To investigate potential associations between head tremor and other symptoms or patient demographics in CD.

Main Methods:

  • Prospective evaluation of 114 consecutive cervical dystonia patients over a 9-month period.

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  • Detailed patient questionnaires were used to collect clinical data.
  • Statistical analysis included chi-square and t-tests to compare the HT+ and HT- groups.

    • Main Results:

    • Head tremor was present in 68.4% of CD patients, with 34.6% experiencing tremor as an initial symptom.
    • HT+ patients showed a higher prevalence in women (66.7% vs. 41.7%) and a more frequent family history of essential-like tremor (21.8% vs. 5.5%).
    • Associated neck pain (92.3% vs. 77.8%) and essential-like hand tremor (40% vs. 8.3%) were significantly more common in the HT+ group.

    Conclusions:

    • Head tremor is a frequent comorbidity in cervical dystonia.
    • The association with hand tremor and family history suggests a possible genetic link between CD and essential tremor (ET).
    • Further linkage studies are warranted to confirm the genetic association between CD and ET.