Characteristics of two distinct clinical phenotypes of functional (psychogenic) dystonia: follow-up study.

Abstract excerpt

BACKGROUND: The fixed dystonia phenotype was originally established as a prototype of functional dystonia. Nevertheless, in recent reports different functional dystonia phenotypes have been recognized with dystonic movement comprising phasic instead of tonic contraction. OBJECTIVES: To examine clinical characteristic in all patients with dystonia who fulfilled the criteria for functional movement disorders...

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