Studying Use-Dependent Plasticity

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00067223
First received: August 12, 2003
Last updated: March 5, 2008
Last verified: June 2007
  Purpose

Recent studies suggest that when patients learn a new motor movement, it may cause a change in the way the nerves act in the area of the brain that controls that movement. This change is called use-dependent plasticity.

The purpose of this study is to determine the direction and extent of the changes that take place in the brain areas that control movement in the untrained finger after the training of the opposite finger. The study outcomes may help researchers to develop rehabilitation strategies for people who have suffered brain injuries.

Eighteen healthy adults age 18 years or older will be enrolled in this study. Participants will undergo a clinical exam and then come back to the Clinical Center three times for sessions that will last approximately 2 hours each. For each session, participants' forearms will be immobilized and a small electronic device will be attached to each index finger so that researchers can measure their movements. Participants will be asked to move either index finger and to observe and concentrate on its movement. Investigators will perform transcranial magnetic stimulation (TMS) before and after these motor exercises. For TMS, a wire coil is held over the scalp and a brief electrical current passes through the coil, creating a magnetic pulse that electrically stimulates the brain.


Condition
Healthy

Study Type: Observational
Official Title: Bi-Hemispheric Plasticity Elicited By Unilateral Finger Motor Training

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 28
Study Start Date: August 2003
Estimated Study Completion Date: June 2007
Detailed Description:

Motor training consisting of repetition of unilateral finger movements leads to use-dependent plasticity (UDP) in the contralateral primary motor cortex, M1, in normal volunteers. It is conceivable that motor training in one hand, in addition to changes in the contralateral M1, could elicit plastic changes in the ipsilateral M1. The purpose of this study is to test this hypothesis: Training consisting of repetition of a unilateral finger movement elicits plastic changes in the cortical representation of the homonymous untrained finger in the ipsilateral M1. The study will be performed on normal volunteers and will consist of three to five separate training sessions. The endpoint measure will be, for each session, the change in the direction of the movements evoked by TMS in the untrained index finger as a function of the opposite index finger.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Only healthy volunteers 18 years or older will be included in this protocol. Handedness will be assessed by the Edinburgh Inventory Scale. All experimental sessions will be studied on outpatient basis. Normal Volunteers with right-handedness will be eligible to participate.

EXCLUSION CRITERIA:

Subjects with the history of epilepsy, surgery with metallic implants or known history of metallic particles in the eye, cardiac pacemaker, neural stimulators, cochlear implants, history of drug abuse, psychiatric illness (depression), hypertension or use of medications that influence synaptic plasticity, will be excluded as evaluated by the investigator.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00067223

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00067223     History of Changes
Other Study ID Numbers: 030273, 03-N-0273
Study First Received: August 12, 2003
Last Updated: March 5, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Transcranial Magnetic Stimulation (TMS)
Unilateral Finger Movement
Interhemispheric Inhibition
Motor Training
Plasticity
Healthy Volunteer
HV

ClinicalTrials.gov processed this record on July 28, 2014