Task specific dystonias: classification

Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .

Task specific dystonias: classification. There are abnormal movements which develop during the performance of highly skilled task.

Defining features

  • There are abnormal movements which develop during the performance of highly skilled task
  • There is an initial feeling of tightness and fatigue
  • There is subsequent activation of surrounding muscles
  • The movements impair dexterity
  • There may be associated tremor in the affected body part

Primary task-specific dystonias

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Secondary task-specific dystonias

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References

  1. Torres-Russotto D, Perlmutter JS. Task-specific dystonias. Ann N Y Acad Sci 2008; 1142:179-199.
  2. Schmidt A, Jabusch HC, Altenmüller E, et al. Phenotypic spectrum of musician's dystonia: a task-specific disorder? Mov Disord 2011; 26:546-549.
  3. Roze E, Soumare A, Pironneau I, et al. Case-control study of writer's cramp. Brain 2009; 132:756-764.
  4. Wu LJ, Jankovic J. Runner's dystonia. J Neurol Sci 2006; 251:73-76.
  5. Cutsforth-Gregory JK, Ahlskog JE, McKeon A, et al. Repetitive exercise dystonia: a difficult to treat hazard of runner and non-runner athletes. Parkinsonism Relat Disord 2016; 27:74-80.
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