ABSTRACT
Paroxysmal dyskinesias are a rare heterogeneous group of conditions manifesting as abnormal involuntary movements that recur episodically and last only a brief duration.1,2 The abnormal movements may be choreic, dystonic, ballistic, or other, or a mixture of these. The conditions can be inherited or acquired. Between episodes, the patient is generally normal. Hence, conditions such as tic disorders, where there may be paroxysmal worsening, or task-or action-induced dystonias such as musicians or writing dystonia, are traditionally not considered as forms of paroxysmal dyskinesias.
