Study of Brain Control of Movement
Study Details
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 between the ages of 18 and 65 years 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.
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Detailed Description
The purpose of this study is to investigate the influence of voluntary inhibition of movement, using either negative motor imagery or Go/NoGo reaction task, on cortical inhibitory mechanisms. Intracortical inhibition (ICI) and silent period (SP) are two major cortical inhibitory mechanisms demonstrated by transcranial magnetic stimulation (TMS). Alterations in these inhibitory mechanisms have been extensively studied in various situations, but the influence of voluntary inhibition has not been elucidated yet. In normal volunteers, therefore, we plan to determine if voluntary inhibition of movement influences these cortical inhibitory mechanisms. The primary outcome measures would be any changes in motor evoked potential (MEP) size and intracortical inhibition (ICI) parameters.
Study Design
Outcome Measures
Primary Outcome Measures
Eligibility Criteria
Criteria
Volunteers who are greater than or equal to 18 years old.
Subjects must not have any 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.
Subjects 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
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | National Institute of Neurological Disorders and Stroke (NINDS) | Bethesda | Maryland | United States | 20892 |
Sponsors and Collaborators
- National Institute of Neurological Disorders and Stroke (NINDS)
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
- Colebatch JG, Rothwell JC, Day BL, Thompson PD, Marsden CD. Cortical outflow to proximal arm muscles in man. Brain. 1990 Dec;113 ( Pt 6):1843-56.
- Fuhr P, Agostino R, Hallett M. Spinal motor neuron excitability during the silent period after cortical stimulation. Electroencephalogr Clin Neurophysiol. 1991 Aug;81(4):257-62.
- Triggs WJ, Cros D, Macdonell RA, Chiappa KH, Fang J, Day BJ. Cortical and spinal motor excitability during the transcranial magnetic stimulation silent period in humans. Brain Res. 1993 Nov 19;628(1-2):39-48.
- 010200
- 01-N-0200