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Dystonia is the distortion or impairment of voluntary movement, as in tic, spasm, or myoclonus, due to disordered tonicity of muscle. Sustained muscle contraction (dystonia) may be caused by a number of conditions.
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| Reason | # Patients | Percentage of patients | |
|---|---|---|---|
| 12 | 9% |
|
|
| 4 | 3% |
|
|
| 1 | 1% |
|
|
| 1 | 1% |
|
Report created on November 22, 2009.