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Diffusion tensor imaging in primary cervical dystonia.

C Colosimo1, P Pantano, V Calistri

  • 1Department of Neurological Sciences, University La Sapienza, I-00185 Rome, Italy. carlo.colosimo@uniroma1.it

Journal of Neurology, Neurosurgery, and Psychiatry
|October 18, 2005
PubMed
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Cervical dystonia is associated with subtle brain changes, particularly in the basal ganglia. Diffusion tensor imaging revealed these ultrastructural alterations in patients compared to healthy individuals.

Area of Science:

  • Neuroimaging
  • Neurology
  • Neuroscience

Background:

  • Traditional view posits primary dystonia stems from abnormal basal ganglia function without apparent morphological changes.
  • This study investigates potential ultrastructural alterations in cervical dystonia.

Purpose of the Study:

  • To determine if cervical dystonia causes ultrastructural changes in the brain.
  • To compare brain structure in cervical dystonia patients and healthy controls using diffusion tensor imaging.

Main Methods:

  • Diffusion tensor imaging (DTI) was employed.
  • Fractional anisotropy (FA) and mean diffusivity (MD) were measured in 17 brain regions of interest.
  • 15 patients with cervical dystonia were compared to 10 healthy controls.

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Main Results:

  • Patients exhibited higher FA values in the putamina compared to controls.
  • Lower FA values were observed in the genu and body of the corpus callosum in patients.
  • Patients showed lower MD values in the left pallidum, left putamen, and both caudate nuclei.

Conclusions:

  • Diffusion tensor imaging demonstrates ultrastructural changes in specific brain areas in cervical dystonia patients.
  • These changes are evident in areas including the basal ganglia.
  • Findings challenge the notion of purely functional basal ganglia abnormalities in primary dystonia.