Video 1. The dystonic reaction from subtle onset to the full-blown presentation. In the first segment, the patient presents with involuntary grimacing, slight jaw opening dystonia and blepharospasm, and dystonic posturing of the right hand with involuntary adduction and opposition of the thumb. In the second segment, the patient lays down with a painful left torticollis, jaw opening and jaw-deviating dystonia, head movements are still possible, and left hand dystonia with thumb adduction and opposition is observed; in the last segment, the patient gradually recovers to complete resolution following biperiden injection.

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