mdc312019-sup-0001-VideoS1.mpgvideo/mpg11960KVideo. Video captured and broadcasted with the patient's written consent, illustrating the most important clinical aspects. Segment A: Preoperative video showing mild bilateral hand dystonic posturing with some superimposed athetosis. Cervical dystonia is evident. Voluntary tongue protrusion is achieved only briefly and the extraoral excursion is reduced. Sound production is effortful. Segment B: Postoperative video, 3 years after surgery. Hand dystonia is only slight and clinically insignificant. Cervical dystonia is much improved, as well as tongue protrusion, which is now normal. Speech is mildly affected, but easy to understand.

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