This study will examine the prevalence of four previously identified non-motor markers in a population of cervical dystonia patients, unaffected family members, and healthy volunteers in an attempt to identify a distinct combination of non-motor symptoms that may be indicative of disease development.
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Prevalence of spatial discrimination threshold in cervical dystonia patients, unaffected family members, and healthy volunteers
Timeframe: Up to 6 months after consent is obtained
Prevalence of temporal discrimination threshold in cervical dystonia patients, unaffected family members, and healthy volunteers
Timeframe: Up to 6 months after consent is obtained
Prevalence of vibration-induced illusion of movement in cervical dystonia patients, unaffected family members, and healthy volunteers
Timeframe: Up to 6 months after consent is obtained
Prevalence of impaired kinesthesia in cervical dystonia
Timeframe: Up to 6 months after consent is obtained