Improving Motor Learning in Stroke Patients

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00067197
First received: August 12, 2003
Last updated: July 18, 2008
Last verified: July 2008
  Purpose

No universally successful therapy exists that promotes recovery of motor function after a stroke, the main cause of long-term disability among adults.

The purpose of this study is to develop strategies to improve recovery of lost motor function. It will combine motor skills training with a brain-stimulating technique called transcranial direct current stimulation (tDCS).

Healthy adult volunteers and adult stroke patients will be enrolled in this study. Participants will come to NIH for a clinical and neurological exam, and, if necessary, an MRI [magnetic resonance imaging] examination. Participants will return for 4 sessions; each lasting approximately 3 hours. The first will be a practice session during which participants will become familiar with the motor skills required of them in this study, such as performing finger movements on a keyboard, pinching, tapping, making wrist movements, and lifting small items. In sessions 2 and 3, participants will perform the motor skills they practiced in session 1 while receiving tDCS. During session 4, they will receive tDCS only, with no performance of motor skills.

During tDCS, investigators will place electrodes with a gel on participants' heads and pass the tDCS current between these two electrodes. tDCS is a painless procedure.

Participants will receive up to $420 in compensation for their involvement in this study.

...


Condition
Cerebrovascular Accident

Study Type: Observational
Official Title: Modulation of Motor Learning in Chronic Stroke Patients by Transcranial DC Stimulation

Resource links provided by NLM:


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

Estimated Enrollment: 76
Study Start Date: August 2003
Estimated Study Completion Date: July 2008
Detailed Description:

There is no universally accepted strategy to promote recovery of motor function after chronic stroke, the main cause of long-term disability among adults. It is desirable to develop strategies to accelerate motor learning in this patient group. Previous studies in healthy volunteers demonstrated that cortical stimulation in association with training leads to improvements of motor learning and use-dependent plasticity. The purpose of this protocol is to apply a painless stimulation technique to the motor cortex of the affected hemisphere of patients with subcortical stroke (transcranial DC stimulation, tDCS) to test the hypothesis that tDCS of the motor cortex of the affected hemisphere in association with motor training will improve motor learning of a finger sequence in the paretic hand.

Furthermore, recent studies have demonstrated that the unaffected hemisphere exerts abnormally high inhibitory influence over the affected hemisphere. This abnormality might adversely influence motor recovery. Therefore a further purpose of the study is to apply tDCS to the unaffected hemisphere to test the hypothesis that reduction of the inhibitory influence of the unaffected hemisphere over the affected in association with motor training will improve motor learning.

This technique has been so far applied in several hundred subjects worldwide in the absence of undesirable side effects reported to date.

We plan to study patients with chronic strokes and healthy age- and gender matched normal volunteers. Primary outcome measure will be the number of correct keyboard piano sequences played in a specific time-period (30 seconds). Secondary outcome measures are speed of tapping with only one finger; simple reaction times; pinch force; and a functional measure of activities of daily life (ADL): Jebsen-Tailor-Test. To better understand the mechanisms underlying the proposed behavioral gains, we will use TMS to identify changes in corticomotor excitability.

  Eligibility

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

We will include patients with thromboembolic non-hemorrhagic hemispheric lesions at least 3 months after the stroke.

We will choose Patients who initially had a severe motor paresis (below MRC grade 2), which subsequently recovered to the point that they have a residual motor deficit but can perform the required tasks. Assessment of the initial functional state will be taken either from patient report or medical records.

As the control group, we will include age- and gender matched Normal Volunteers with matched non-dominant/dominant hand (to the affected hand of the stroke patients).

EXCLUSION CRITERIA:

Patients with more than one stroke in the medical cerebral artery territory.

Patients with bilateral motor impairment.

Patients with cerebellar or brainstem lesions.

Patients or Normal Volunteers unable to perform the task (wrist or elbow flexion at least MRC grade 2).

Patients or Normal Volunteers with severe alcohol or drug abuse, psychiatric illness like severe depression, poor motivational capacity, or severe language disturbances, particularly of receptive nature or with serious cognitive deficits (defined as equivalent to a mini-mental state exam score of 23 or less).

Patients or Normal Volunteers with history of severe uncontrolled medical problems (e.g. cardiovascular disease, severe rheumatoid arthritis, active joint deformity of arthritic origin, active cancer or renal disease, any kind of end-stage pulmonary or cardiovascular disease, or a deteriorated condition due to age, uncontrolled epilepsy or others).

Patients or Normal Volunteers with increased intracranial pressure as evaluated by clinical means.

Patients or Normal Volunteers with unstable cardiac arrhythmia.

Patients or Normal Volunteers with h/o hyperthyroidism or individuals receiving drugs acting primarily on the central nervous system.

Patients and Normal Volunteers with more than moderate to severe microangiopathy, polyneuropathy, diabetes mellitus, or ischemic peripheral disease.

Patients or Normal Volunteers which are or which have been professional piano players.

Pregnancy.

  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: NCT00067197

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: NCT00067197     History of Changes
Other Study ID Numbers: 030267, 03-N-0267
Study First Received: August 12, 2003
Last Updated: July 18, 2008
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Transcranial Direct Current Stimulation (tDCS)
Cortical Reorganization
Rehabilitation
Motor Learning
Activity of Daily Living (ADL)
Stroke
Healthy Volunteer
HV

Additional relevant MeSH terms:
Cerebral Infarction
Stroke
Brain Infarction
Brain Ischemia
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases

ClinicalTrials.gov processed this record on August 21, 2014