<unk>  is one of the most common forms of dystonia seen in neurology clinics, occurring in approximately 0.390% of the United<unk> ates population in 2007 (390 per 100,000). Worldwide, it has been reported that the incidence rate of<unk>  is at least 1.2 per 100,000 person years, and a prevalence rate of 57 per 1 million. The exact prevalence of the disorder is not known; several family and population<unk> udies show that as many as 25% of cervical dystonia patients have relatives that are undiagnosed.<unk> udies have shown that<unk>  is not diagnosed immediately; many patients are diagnosed well after a year of seeking medical attention. A survey of 59 patients diagnosed with<unk>  show that 43% of the patients visited at least four physicians before the diagnosis was made. There is a higher prevalence of<unk>  in females; females are 1.5 times more likely to develop<unk>  than males. The prevalence rate of<unk>  also increases with age, most patients show symptoms from ages 50–69. The average onset age of<unk>  is 41.
Spasmodic torticollis
Torticollis
Dysbarism
Superior oblique myokymia
Pseudostrabismus
Benign paroxysmal torticollis
Hemifacial spasm
Misophonia