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Movement Disorders in Hereditary Cerebellar Ataxia.

Joana Damásio1,2,3, Sara Costa1, João Moura1

  • 1Neurology Department, Centro Hospitalar Universitário de Santo António, Unidade Local de Saúde de Santo António, Porto, Portugal.

Movement Disorders Clinical Practice
|February 12, 2025
PubMed
Summary

Movement disorders, especially dystonia, are common in hereditary cerebellar ataxia (HCA). These conditions significantly increase disability, emphasizing the need for early detection and personalized treatment strategies for HCA patients.

Keywords:
choreadystoniamyoclonusspinocerebellar ataxia; parkinsonismtics

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Area of Science:

  • Neurology
  • Genetics
  • Movement Disorders

Background:

  • Hereditary cerebellar ataxia (HCA) encompasses diverse neurological disorders.
  • Non-ataxia movement disorders (MD) are increasingly recognized in HCA, with varying prevalence.

Purpose of the Study:

  • To determine the types and frequency of movement disorders in HCA patients.
  • To identify factors linked to MD and their impact on patient disability.

Main Methods:

  • Prospective study initiated in 2017 with annual structured assessments.
  • Analysis of clinical and genetic data from a cohort of 193 symptomatic HCA patients.

Main Results:

  • Movement disorders (MD) were found in 54.4% of patients, most commonly dystonia (49.2%).
  • Machado-Joseph disease (MJD/SCA3) and ATX-RFC1 were the most frequent forms.
  • MD presence correlated with autosomal dominant inheritance, ATXN3 gene, increased disability, falls, and wheelchair confinement.

Conclusions:

  • Movement disorders, particularly dystonia, are prevalent in HCA.
  • MD significantly exacerbates motor disability in HCA.
  • Early identification and tailored management are crucial for HCA patients with MD.