- Conditions
- Phonation Disorder, Spastic Dysphonia, Voice Disorder
- Interventions
- Not listed
- Lead sponsor
- National Institute of Neurological Disorders and Stroke (NINDS)
- NIH
- Eligibility
- 20 Years to 80 Years
- Enrollment
- 370 participants
- Healthy volunteers
- Healthy volunteers not accepted
- Timeline
- Started 1998
- U.S. locations
- 1
- States / cities
- Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 22, 2026, 5:44 AM EDT