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Brain Excitability During Self-Paced Voluntary Movements

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ClinicalTrials.gov Identifier: NCT00017966
Recruitment Status : Completed
First Posted : June 25, 2001
Last Update Posted : March 4, 2008
Information provided by:

Study Description
Brief Summary:

This study will use transcranial magnetic stimulation to examine how the brain controls movement by sending messages to the spinal cord and muscles and what goes wrong with this process in disease. Normal healthy volunteers 18 years of age and older may be eligible to participate.

In transcranial magnetic stimulation, an insulated wire coil is placed on the subject's scalp or skin. Brief electrical currents are passed through the coil, creating magnetic pulses that stimulate the brain. During the stimulation, participants will be asked to tense certain muscles slightly or perform other simple actions. The electrical activity of the muscle will be recorded on a computer through electrodes applied to the skin over the muscle. In most cases, the study will last less than 3 hours.

Condition or disease
Movement Disorder Healthy

Detailed Description:
The purpose of this study is to investigate the influence of volitional movement on excitability of ipsilateral as well as contralateral motor cortical neurons controlling homologous and surrounding muscles. Transcallosal and surrounding inhibitions are well known phenomenon to suppress unwanted movements during voluntary action, which is often disturbed in various movement disorders. Transcranial magnetic stimulation (TMS) has been used to investigate these inhibitory mechanisms, but the inhibitory influence during and after voluntary movement has not been well elucidated yet. In normal volunteers, we plan to determine if voluntary movements of one finger influence the cortical excitability responsible for surrounding as well as contralateral homologous muscles, using voluntary movement-triggered TMS. The primary outcome measures would be any changes in motor evoked potential (MEP) size and intracortical inhibition (ICI) parameters.

Study Design

Study Type : Observational
Estimated Enrollment : 30 participants
Official Title: Cortical Excitability During Self-Paced Voluntary Movements
Study Start Date : June 2001
Estimated Study Completion Date : June 2002
Groups and Cohorts

Outcome Measures

Eligibility Criteria

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Normal adult volunteers 18 or more years old.

Subjects must not have medico-surgical illness.

Subjects must not have neurological illness.

Subjects must not have psychiatric illness.

Subjects must not be taking any medication with potential influence on nervous system function.

Subjects must not have a pacemaker.

Subject must not have an implanted medical pump.

Subjects must not have a metal plate or a metal object in the skull or eye.

Subjects must not have a history of seizure disorder.

Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00017966

United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)
More Information

ClinicalTrials.gov Identifier: NCT00017966     History of Changes
Other Study ID Numbers: 010199
First Posted: June 25, 2001    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: June 2002

Keywords provided by National Institutes of Health Clinical Center (CC):
Transcranial Magnetic Stimulation
Motor Cortex
Cerebral Inhibition
Corpus Callosum
Evoked Potential
Healthy Volunteer
Normal Control

Additional relevant MeSH terms:
Movement Disorders
Central Nervous System Diseases
Nervous System Diseases