<p>Patients with <i>DYT</i>-1 dystonia showed an abrupt decrease in motor and disability scores, and a sustained improved state during the follow-up period. Patients with <i>PKAN</i> had relatively higher motor and disability scores preoperatively. But some patients showed substantial improvement in motor score over time; 2 patients acquired improvement which appeared even after postoperative 12 months without resetting (indicated as asterisks). Tardive dystonia patients experienced no considerable improvement in motor and disability scores, except for 1 patient. (PKAN: pantothenate kinase-associated neurodegeneration)</p
