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Related Experiment Videos

Cerebral activation pattern in primary writing tremor.

D Berg1, C Preibisch, E Hofmann

  • 1Department of Neurology, Bayerische Julius-Maximilians- Universität Würzburg, Josef-Schneider-Strasse 11, D - 97080 Würzburg, Germany.

Journal of Neurology, Neurosurgery, and Psychiatry
|November 18, 2000
PubMed
Summary
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Writing tremor involves distinct brain activation patterns compared to healthy individuals, including the premotor and prefrontal cortex. These findings suggest a unique category for writing tremor, integrating features of essential tremor and writer's cramp.

Area of Science:

  • Neuroscience
  • Neurology

Background:

  • Writing tremor is a condition affecting fine motor control during handwriting.
  • Understanding the underlying neurobiological mechanisms is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate and compare cerebral activation patterns during writing in patients with writing tremor versus healthy controls.
  • To identify unique brain regions involved in writing tremor using functional magnetic resonance imaging (fMRI).

Main Methods:

  • Functional MRI (fMRI) was employed on a 1.5 Tesla scanner.
  • A cohort of three patients with writing tremor and ten healthy controls participated.
  • Subjects underwent an alternating paradigm of rest and writing, with data analyzed using SPM96 software.

Related Experiment Videos

Main Results:

  • Both groups activated the contralateral primary sensorimotor cortex, supplementary motor area (SMA), and area 44.
  • Writing tremor patients exhibited additional activation in the contralateral premotor area (area 6) and ipsilateral prefrontal areas (inferior frontal gyrus; areas 10, 44, 47).
  • Patients with writing tremor showed bilateral activation of the parietal lobule (area 40) and cerebellum, with more pronounced contralateral and ipsilateral activation, respectively.

Conclusions:

  • The observed brain activation patterns in writing tremor encompass features seen in both essential tremor and writer's cramp.
  • A distinct classification for writing tremor is proposed, integrating key characteristics of essential tremor and writer's cramp.