Dystonic Disorder, Focal Dystonia, Writer's Cramp
Conditions
Keywords
Dystonic Disorder, Focal Dystonia, Writer's Cramp
Brief summary
Writer's cramp is a focal dystonia characterized by abnormal movements and postures during writing. Limited finger independence during writing manifests as difficulty suppressing unwanted activations of neighbouring non task-relevant fingers. Patients with Writer's cramp also have difficulty in fine control of grip force. The investigators have recently developed the Finger Force Manipulandum which quantifies the forces applied by each fingers in different tasks. This method is sensitive for detection and quantification of small unwanted contractions in non-active ('stationary') fingers. Different tasks have been developed to assess abilities such as finger individuation but also fine finger force control, finger movement regularity and speed. The aim of this study is to assess if developed tasks allow to precisely characterize writer's cramp condition in terms of abilities aforementioned. To do so, performance of 20 writer's cramp patients in the developed task will be compared with performance of 20 control participants (matched in age, sex and writing hand) in the same tasks.
Interventions
DEVICEFinger Force Manipuladum (FFM)
Tasks performed with the device Finger Force Manipuladum (FFM), to assess abilities such as finger individuation but also fine finger force control, finger movement regularity and speed.
Sponsors
Institut National de la Santé Et de la Recherche Médicale, France
Fondation Ophtalmologique Adolphe de Rothschild
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
for patients with writer's cramp * Patient with writer's cramp and writing speed \<140 letters / min * Writer's cramp focal dystonia specific to the task of writing * Patient treated or not with botulinum toxin injection * Person having attended school in French Non inclusion criteria for patients with writer's cramp * Patients whose writer's cramp has no impact on the handwriting and has kept a writing speed\> 140 letters per minute. * Tremor of writing * Neurological condition other than writer's cramp (eg Parkinson's syndrome) * Pain, trauma or pathology of the upper limb of the writing member other than the writer's cramp who required medical or surgical treatment in the last 6 months preceding the initial check-up Inclusion criteria for control subjects •\> 18 years old * Without writer's cramp * Person having attended school in French Non inclusion criteria for control subjects * Tremor of writing * Neurological condition other than writer's cramp (eg Parkinson's syndrome) * Pain, trauma or pathology of the upper limb of the writing member other than the writer's cramp who required medical or surgical treatment in the last 6 months preceding the initial check-up Matching criteria between cases and control patients * Age (± 5 years) * Gender * Hand writing
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Manual dexterity by the FFM | Inclusion | Compare the manual dexterity by the FFM between subjects with writer's cramp and control subject |
Countries
France
Outcome results
None listed