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Cervical dystonia
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Cervical dystonia

Cervical dystonia may involve head rotation (torticollis), head tilt to one side (laterocollis), or flexion or extension of the neck (anterocollis, retrocollis), often accompanied by tonic shoulder elevation or head tremor. It may be difficult to distinguish nondystonic from dystonic head tremor; only the latter can be improved by antagonistic maneuvers. Dystonia often causes pain, usually in the neck and shoulder.



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