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ClinicalTrials.gov public records Last synced May 21, 2026, 7:19 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 36 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Spasmodic Dysphonia Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Spasmodic Dysphonia
Interventions
Laryngeal Vibration (Treatment), Laryngeal Vibration (Comparator)
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 3, 2025 · Synced May 21, 2026, 7:19 PM EDT
Withdrawn Phase 2 Interventional
View directory record Official record
Conditions
Adductor Spasmodic Dysphonia, Abductor Spastic Dysphonia, Laryngeal Dystonia
Interventions
vibro-tactile stimulation (VTS)
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 15, 2025 · Synced May 21, 2026, 7:19 PM EDT
Completed Phase 1Phase 2 Interventional Results available
View directory record Official record
Conditions
Adductor Spasmodic Dysphonia, Voice Disorders, Spasmodic Dysphonia
Interventions
DaxibotulinumtoxinA
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced May 21, 2026, 7:19 PM EDT
Not yet recruiting Not applicable Interventional
View directory record Official record
Conditions
Presbylarynx, Aspiration, Spasmodic Dysphonia, Globus Pharyngeus, Larynx Paralysis, Laryngeal Disease, Vocal Cord Paralysis, Iatrogenic Injury, Sensory Neuropathy
Interventions
Cheung-Bearelly Aesthesiometer, Transnasal Laryngoscopy, Questionnaires
Device · Procedure · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 22, 2025 · Synced May 21, 2026, 7:19 PM EDT
Completed No phase listed Observational
View directory record Official record
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 21, 2026, 7:19 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Spasmodic Dysphonia, Dystonia
Interventions
Vocal Exercise
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 2, 2016 · Synced May 21, 2026, 7:19 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Dystonia
Interventions
Vibrotactile Stimulation (VTS)
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced May 21, 2026, 7:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Spastic Dysphonia, Healthy
Interventions
airway interruption test
Device
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced May 21, 2026, 7:19 PM EDT
Completed Phase 1 Interventional
View directory record Official record
Conditions
Voice Disorders
Interventions
Dextromethorphan, Lorazepam
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 80 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 21, 2026, 7:19 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Communication Disorder, Healthy, Stuttering, Tourette Syndrome, Voice Disorder
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
18 Years to 85 Years
Enrollment
1,163 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced May 21, 2026, 7:19 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Dystonia, Spasmodic Dysphonia, Tremor
Interventions
Brain imaging, Laryngeal sensory block with topical bupivacaine
Other · Drug
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
18 Years to 80 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced May 21, 2026, 7:19 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Spasmodic Dysphonia, Voice Tremor
Interventions
Sodium oxybate
Drug
Lead sponsor
Kristina Simonyan
Other
Eligibility
21 Years to 80 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 21, 2017 · Synced May 21, 2026, 7:19 PM EDT
Completed Phase 1Phase 2 Interventional
View directory record Official record
Conditions
Spasmodic Dysphonia, Laryngeal Dystonia
Interventions
Vibro-tactile stimulation
Device
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced May 21, 2026, 7:19 PM EDT
Withdrawn No phase listed Observational
View directory record Official record
Conditions
Spasmodic Dysphonia, Laryngeal Dystonia
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
2
States / cities
Atlanta, Georgia • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 29, 2016 · Synced May 21, 2026, 7:19 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Spasmodic Dysphonia, Focal Dystonia
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
21 Years to 80 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 4, 2018 · Synced May 21, 2026, 7:19 PM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Laryngeal Dystonia
Interventions
Starstim system
Device
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced May 21, 2026, 7:19 PM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Spasmodic Dysphonia, Adductor Spasmodic Dysphonia, Voice Disorders
Interventions
Sensation testing
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 85 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 10, 2024 · Synced May 21, 2026, 7:19 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Dystonia, Focal Dystonia
Interventions
repetitive transcranial magnetic stimulation (rTMS), sham rTMS
Device
Lead sponsor
MGH Institute of Health Professions
Other
Eligibility
21 Years to 85 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced May 21, 2026, 7:19 PM EDT
Not yet recruiting Phase 1 Interventional
View directory record Official record
Conditions
Spasmodic Dysphonia, Laryngeal Dystonia, Voice Tremor
Interventions
sodium oxybate
Drug
Lead sponsor
Kristina Simonyan
Other
Eligibility
21 Years to 80 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced May 21, 2026, 7:19 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Dystonia
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3,265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2020
U.S. locations
34
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Fountain Valley, California + 26 more
Source: ClinicalTrials.gov public record
Updated Oct 25, 2020 · Synced May 21, 2026, 7:19 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Spasmodic Dysphonia, Singer's Dystonia, Writer's Cramp, Musician's Focal Hand Dystonia, Craniofacial Dystonia, Blepharospasm Oromandibular Dystonia
Interventions
MRI, Blood draw
Other · Procedure
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
21 Years to 80 Years
Enrollment
141 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 7, 2025 · Synced May 21, 2026, 7:19 PM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Laryngeal Dystonia, Spasmodic Dysphonia, Tremor, Dystonia
Interventions
Deep Brain Stimulation
Procedure
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
18 Years to 80 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced May 21, 2026, 7:19 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Voice Disorders
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
20 Years to 70 Years
Enrollment
174 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 21, 2026, 7:19 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Laryngeal Dystonia, Unaffected Relatives of Laryngeal Dystonia Patients, Voice Tremor, Muscle Tension Dysphonia
Interventions
MRI, Blood draw
Other · Procedure
Lead sponsor
Kristina Simonyan
Other
Eligibility
Not listed
Enrollment
410 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced May 21, 2026, 7:19 PM EDT