Transcranial Magnetic Stimulation and Electrical Stimulation of Nerves to Study Focal Dystonia (NCT00050024) | Clinical Trial Compass
CompletedNot Applicable
Transcranial Magnetic Stimulation and Electrical Stimulation of Nerves to Study Focal Dystonia
United States38 participantsStarted 2002-11-13
Plain-language summary
This study will use transcranial magnetic stimulation (TMS) and electrical stimulation of nerves to examine how the brain controls muscle movement in focal hand dystonia (writer's cramp). Normally, when a person moves a finger, the brain's motor cortex prevents the other fingers from moving involuntarily. Patients with focal hand dystonia have difficulty with individualized finger movements, possibly due to increased excitability of the motor cortex. Musicians, writers, typists, athletes and others whose work involves frequent repetitive movements may develop focal dystonia of the hand.
Healthy normal volunteers and patients with focal dystonia 18 years of age and older may be eligible for this study.
For the TMS procedure, subjects are seated in a comfortable chair with their hands placed on a pillow on their lap. An insulated wire coil is placed on the scalp. A brief electrical current is passed through the coil, creating a magnetic pulse that stimulates the brain. This may cause muscle, hand or arm twitching if the coil is near the part of the brain that controls movement, or it may induce twitches or transient tingling in the forearm, head or face muscles. Subjects will be asked to move a finger. Just before this movement, a brief electrical stimulation will be applied to the end of either the second or fifth finger. Metal electrodes will be taped to the skin over the muscle for computer recording of the electrical activity of the hand and arm muscles activated by the stimulation. The testing will last 2-3 hours.
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Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
* INCLUSION CRITERIA:
Nineteen patients age 18 and over with focal dystonia of the upper limbs (writer's cramp) will be recruited for the study.
For patients, the only selection criteria are the presence of focal hand dystonia.
Nineteen normal subjects age 18 and over will be recruited for the control group.
The controls will not have dystonia or any other neurological condition.
All subjects will sign an informed consent prior to participation in the trial.
EXCLUSION CRITERIA:
Exclusion criteria for the trial covering both the normal control and dystonia group will include any concurrent medical or surgical condition as well as neurological or psychiatric illnesses.
Exclusion criteria will include any individual who is on medications with potential influence of the nervous system function (antidepressants, anxiolytics, anticonvulsants, antipsychotic, antiparkinson, hypnotics, stimulants, and antihistamines).
The exclusion criteria also include patients who have received Botulinum toxin injection within 3 months of starting the protocol.
Furthermore, any individual who has a pacemaker, an implanted medical pump, a metal plate or metal object in the skull or eye (for example, after brain surgery), or who has a history of seizure disorder will be excluded from the trial.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Trial details
NCT IDNCT00050024
SponsorNational Institute of Neurological Disorders and Stroke (NINDS)