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Could a magnet on the head ease voice spasms?

NCT ID NCT05095740

Symptom relief Sponsor: MGH Institute of Health Professions Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

Laryngeal dystonia causes the vocal folds to spasm, leading to a strained or breathy voice. This study tests whether a non-invasive brain stimulation technique called rTMS can calm the overactive brain signals that cause these spasms. Twenty-five adults with laryngeal dystonia will receive either real or sham rTMS, and researchers will measure changes in voice quality and brain activity. The goal is to see if this approach could offer a new, less invasive alternative to Botox injections.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
repetitive transcranial magnetic stimulation (rTMS)
What this could lead to
If it works, this could point toward a non-invasive treatment option for laryngeal dystonia that reduces voice symptoms without the need for repeated Botox injections.
What could go wrong
This is a very early, small proof-of-concept study with only 25 participants. It tests a single session of rTMS, so any benefits may be short-lived or not work for everyone.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 25 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jun 2021

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

21 to 85 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age range is 21-85 years * Diagnosis of Laryngeal Dystonia (LD) * Subject is able to give informed consent * Symptoms at worst severity if receiving botulinum toxin injections * Subject has signed the consent form Exclusion Criteria: * Other forms of dystonia * Vocal fold pathology or paralysis * Essential tremor * Laryngeal cancer or other neurologic conditions with medications affecting the central nervous system * History of laryngeal surgery * Adults lacking the ability to consent or complete the assessments and intervention * Seizure in the last 2 years * Contraindications to rTMS

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Conditions

The condition(s) this trial relates to.

dystonic disorder focal dystonia spasmodic dystonia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Focal dystonia Laryngeal dystonia

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Teresa J Kimberley

    RECRUITING

    Boston, Massachusetts, 02129, United States

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