TorticollisDystoniaAnti-Dyskinesia AgentsDystonic DisordersBotulinum Toxins, Type ANeuromuscular AgentsBotulinum ToxinsDystonia Musculorum DeformansSensation DisordersNeck MusclesGlobus PallidusReceptors, Dopamine D5Cervical VertebraeTremorDeglutition DisordersBasal GangliaTherapeutic EquivalencyDeep Brain StimulationElectromyographySeverity of Illness IndexPostureBlepharospasmMeige SyndromeMagnetic Resonance ImagingMuscle CrampPainTreatment Outcome