title: Two task-specific dystonias in one hand.
abstract: BACKGROUND
  Dystonia is characterized by involuntary muscle contractions that lead to abnormal postures and/or repetitive movements. Task-specific dystonia only manifests during a specific activity.
  
  
  METHODS
  We report a case of a female with writer's cramp who developed a second task-specific hand dystonia (tremor and abnormal posturing of the hand while using a computer mouse) many years after the initial onset.
  
  
  CONCLUSIONS
  This observation is in agreement with the concept that task-specific hand dystonia is induced by repetitive, skilled hand movements in those who have an intrinsic vulnerability towards developing "dystonic" motor programs.
authors: Department of Neurology, Radboud University Nijmegen Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands.
authors: Manon
authors: M
authors: Linssen
authors: Cathérine
authors: C
authors: Delnooz
authors: Bart
authors: B
authors: van de Warrenburg
keywords: Task-specificity; dystonia; tremor; writer's cramp
references: Hum Mov Sci. 2006 Oct;25(4-5):454-63
references: 16859794
references: Ann N Y Acad Sci. 2008 Oct;1142:179-99
references: 18990127
references: Lancet Neurol. 2011 Dec;10(12):1074-85
references: 22030388