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Mov Disord Clin Pract. 2016 Jun 6;4(1):121-124. doi: 10.1002/mdc3.12371. eCollection 2017 Jan-Feb.

Down the Stairs Dystonia-A Novel Task-Specific Focal Isolated Syndrome.

Author information

1
Department of Medicine Division of Neurology McMaster University Hamilton Ontario Canada.
2
Department of Clinical Neurological Sciences Western University London Ontario Canada.
3
Division of Neurology Department of Medicine Dalhousie University Halifax Nova Scotia Canada.
4
Private Practice Cambridge Ontario Canada.
5
Department of Neurology Auckland Hospital Auckland New Zealand.
6
Department of Neurology Concord Repatriation General Hospital Concord New South Wales Australia.
7
Movement Disorders Unit Department of Neurology Westmead Hospital and Sydney Medical School University of Sydney Sydney New South Wales Australia.
8
National Parkinson Foundation Center of Excellence and Movement Disorder Program London Health Sciences Center London Ontario Canada.

Abstract

Adult-onset, task-specific dystonia of the lower limb is a rare occurrence. In this report, the authors present 6 cases of task-specific dystonia manifested only when going down the stairs. These patients were seen by 6 different neurologists from across Canada, Australia, and New Zealand, and all videos were reviewed by 1 movement disorders specialist who made the final diagnosis. Video description of each case is also presented. All 6 patients demonstrated dystonia of 1 of their lower limbs specifically only when going down the stairs. The remainder of the neurological examination was normal, and distractibility, inconsistency, fixed dystonia, or a premonitory urge were absent, making functional movement disorder and tic disorder unlikely. These 6 patients display a distinct, adult-onset, focal isolated dystonia manifested only on going down the stairs that is recognizable as a new task-specific dystonia of the lower extremity.

KEYWORDS:

clinical neurology; dystonia; lower limb dystonia; movement disorders; task‐specific dystonia

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