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ClinicalTrials.gov public records Last synced Oct 23, 2026, 5:55 PM EDT

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Showing 1–24 of 36 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Spasmodic Dysphonia Clear all
Recruiting No phase listed Observational Accepts healthy volunteers

Brain Networks in Dystonia

NCT03042962
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 8, 2025 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Neuromodulation in Laryngeal Dystonia

NCT05095740
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 20, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Not applicable Interventional

Effects of Vocal Exercises for Spasmodic Dysphonia

NCT03349086
View directory record Official record
Conditions
Adductor Spasmodic Dysphonia
Interventions
Voice Exercise
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
21 Years to 70 Years · Female only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 23, 2019 · Synced Oct 23, 2026, 5:55 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Characteristics of Idiopathic Familial Voice Disorders

NCT00001552
View directory record Official record
Conditions
Laryngeal Disease, Spastic Dysphonia, Voice Disorder
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
270 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 1996
U.S. locations
2
States / cities
Iowa City, Iowa • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 2, 2017 · Synced Oct 23, 2026, 5:55 PM EDT
Withdrawn No phase listed Observational

Examining the Spasmodic Dysphonia Diagnosis and Assessment Procedure (SD-DAP) for Measuring Symptom Change

NCT02061943
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 30, 2016 · Synced Oct 23, 2026, 5:55 PM EDT
Completed No phase listed Observational

Sensory Function in Idiopathic Voice Disorders

NCT00001922
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 2, 2017 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Zinc Supplementation Prior to Botox Injections for Spasmodic Dysphonia

NCT05892770
View directory record Official record
Conditions
Spasmodic Dysphonia
Interventions
Zinc gluconate supplement, Botulinum toxin type A
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting No phase listed Observational

Deep Brain Stimulation for Laryngeal Dystonia: From Mechanism to Optimal Application

NCT05506085
View directory record Official record
Conditions
Laryngeal Dystonia, Adductor Spastic Dysphonia of Dystonia
Interventions
Deep Brain Stimulation
Device
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 70 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 14, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 1 Interventional

Dextromethorphan to Treat Patients With Voice Spasms

NCT00055549
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 2, 2017 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Laryngeal Vibration for Spasmodic Dysphonia

NCT03746509
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 4, 2025 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study of Air Stream in Voice Production

NCT00015795
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 4, 2008 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

rTMS in Spasmodic Dysphonia

NCT02957942
View directory record Official record
Conditions
Spasmodic Dysphonia, Laryngeal Dystonia
Interventions
1Hz repetitive transcranial magnetic stimulation (rTMS)
Device
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 1, 2020 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting Not applicable Interventional

tDCS for Laryngeal Dystonia

NCT06830174
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 9, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Not listed Phase 4 Interventional

Reversal of Botulinum Neurotoxin Injection Related Dysphonia With Pyridostigmine

NCT05110417
View directory record Official record
Conditions
Dysphonia, Spastic, Dysphonia, Laryngeal Dystonia
Interventions
Pyridostigmine Bromide 60 Milligrams (mg)
Drug
Lead sponsor
Eastern Virginia Medical School
Other
Eligibility
21 Years to 100 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 27, 2022 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Voice Tremor in Spasmodic Dysphonia: Central Mechanisms and Treatment Response

NCT01961297
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 22, 2017 · Synced Oct 23, 2026, 5:55 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Mapping of Voice Control

NCT00066911
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 2, 2017 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting No phase listed Observational

Imaging Genetics of Laryngeal Dystonia

NCT03042975
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 2, 2025 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Usability of Vibro-tactile Stimulation to Treat Spasmodic Dysphonia

NCT06111027
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 Jul 15, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Understanding Disorder-specific Neural Pathophysiology in Laryngeal Dystonia and Voice Tremor

NCT05216770
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 2, 2025 · Synced Oct 23, 2026, 5:55 PM EDT
Completed No phase listed Observational

The Dystonia Coalition Natural History and Biospecimen Repository for Isolated Dystonias

NCT01373424
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 26, 2020 · Synced Oct 23, 2026, 5:55 PM EDT
Completed No phase listed Observational

Neuropathology of Spasmodic Dysphonia

NCT00118586
View directory record Official record
Conditions
Voice Disorders, Spasmodic Dysphonia, Healthy, Movement Disorder, Focal Dystonia
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
21 Years and older
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 8, 2022 · Synced Oct 23, 2026, 5:55 PM EDT
Not yet recruiting Not applicable Interventional

Assessment of Laryngopharyngeal Sensation: Cancer Survivor Cohort

NCT06078527
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
2026 – 2029
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Completed Phase 1Phase 2 Interventional Results available

DaxibotulinumtoxinA Injection for Treatment of Adductor Spasmodic Dysphonia

NCT05158166
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 18, 2026 · Synced Oct 23, 2026, 5:55 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Brain-Computer Interfaces in Laryngeal Dystonia

NCT04421365
View directory record Official record
Conditions
Laryngeal Dystonia
Interventions
neurofeedback brain-computer interface (BCI)
Device
Lead sponsor
Kristina Simonyan
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Oct 23, 2026, 5:55 PM EDT