Paresis Clinical Trial
Official title:
Effects of Unilateral and Bilateral Training on Motor Function in Chronic Stroke
Verified date | January 14, 2011 |
Source | National Institutes of Health Clinical Center (CC) |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
This study will compare the effectiveness of unilateral versus bilateral exercise training
for recovering movement abilities in chronic stroke patients. After a stroke, some people
have improved their movement ability by exercising the arm affected by the stroke. Others
have improved by exercising both arms together. This study will compare these two kinds of
exercise to see which might work best.
Healthy volunteers and people who have had a stroke more than 6 months ago may be eligible
for this study. Stroke patients must have some weakness in their stroke-affected arm. All
participants must be 18 years of age or older. Candidates are screened with a clinical and
neurological examination. Women who can become pregnant have a pregnancy test. Stroke
patients have a magnetic resonance imaging (MRI) study of the brain if they have not had one
in the last year.
Participants undergo the following tests and procedures:
MRI: This procedure uses a magnetic field and radio waves to produce images of body tissues
and organs. The subject lies on a table that slides into the scanner (a narrow cylinder),
wearing earplugs to muffle loud knocking sounds that occur during the scanning process. The
procedure lasts about 45 minutes, during which time the subject must lie still for up to 30
minutes.
Testing sessions: There are six test sessions - two to familiarize the subject with the
reaching test, two to do the reaching test plus transcranial magnetic stimulation (TMS)
before and after an exercise session, and two to do the reaching test plus TMS one day after
the exercise session. The sessions are on consecutive days, with a 1-week break after session
3. The procedures involved are:
- Reaching test: The subject responds as quickly as possible to a "GO" signal presented on
a computer monitor by performing a reaching movement with his or her arm. The activity
from the arm muscles is recorded using surface electrodes. During this test, a
questionnaire is used to determine the subject's attention, fatigue, and mood.
- TMS: For this test, a wire coil is held on the scalp, and a brief electrical current is
passed through the coil, creating a magnetic pulse that stimulates the brain. During the
stimulation, the subject may be asked to tense certain muscles slightly or perform other
simple actions. The stimulation may cause a twitch in muscles of the face, arm, or leg,
and the subject may hear a click and feel a pulling sensation on the skin under the
coil. The effect of TMS on the muscles is detected with small metal disk electrodes
taped onto the skin of the arms. The subject performs the reaching test while TMS is
delivered at various times after getting the "GO" signal.
- Arm exercises: The subject is seated in front of an exercise device that has two handles
that slide forward and backward along a set of tracks. The subject is asked to slide
either one or both handles back and forth repeatedly, alternating 5 minutes of arm
exercise with 5 minutes of rest for 30 minutes.
Status | Completed |
Enrollment | 24 |
Est. completion date | January 14, 2011 |
Est. primary completion date | |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years and older |
Eligibility |
- INCLUSION CRITERIA: Individuals with Chronic Stroke (n=40): We will include individuals at least 6 months post thromboembolic non-hemorrhagic hemispheric or hemorrhagic hemispheric lesion. We will select individuals who initially had severe hemiparesis but who recovered to the point of having moderate motor impairment. Individuals with moderate motor impairment will be defined by a Fugl-Meyer score of at least 30, and the inability to actively extend the paretic wrist and fingers at least 20 degrees. Assessment of severity of initial hemiparesis will be taken either from patient report or medical records. We would also like to study a smaller group (n=10) of individuals with mild motor impairment due to stroke. Individuals with mild motor impairment will be defined by an Upper Extremity Fugl-Meyer score of 50 or greater (maximum score = 66), and the ability to actively extend the paretic wrist and fingers 20 degrees or more. We will also enroll 10 healthy volunteers. EXCLUSION CRITERIA: Healthy Volunteers: - History of alcohol or drug abuse or psychiatric illness, including depression. - History of neurological disorder or disease, including epilepsy. - History of orthopedic injury or disorder affecting the upper extremities. - Less than 18 years of age. - Have a pacemaker, implanted pumps or stimulators, or metal objects inside the eye or skull. Individuals with Chronic Stroke (Moderate and Mild Impairment Groups): - Unable to perform the task (rapid forward reaching task) with the affected arm. - History of alcohol or drug abuse or psychiatric illness, - History of neurological disorder or disease, including epilepsy. - History of orthopedic injury or disorder affecting the upper extremities. - Less than 18 years of age. - Cerebellar or brainstem lesions. - Severe uncontrolled medical problems (e.g. cardiovascular disease, severe rheumatoid arthritis, arthritic joint deformity, active cancer or renal disease). - Taking medications that act primarily on the central nervous system. - Pregnancy - if MRI was not performed within the past 6 months and therefore needs to be attained. - Serious cognitive deficits (defined as equivalent to a mini-mental state exam score of 23 or less) that would prevent their ability to give informed consent and/or perform the study tasks. - Have a pacemaker, implanted pumps or stimulators, or metal objects inside the eye or skull. |
Country | Name | City | State |
---|---|---|---|
United States | National Institutes of Health Clinical Center, 9000 Rockville Pike | Bethesda | Maryland |
Lead Sponsor | Collaborator |
---|---|
National Institute of Neurological Disorders and Stroke (NINDS) |
United States,
Archambault P, Pigeon P, Feldman AG, Levin MF. Recruitment and sequencing of different degrees of freedom during pointing movements involving the trunk in healthy and hemiparetic subjects. Exp Brain Res. 1999 May;126(1):55-67. — View Citation
Blanton S, Wolf SL. An application of upper-extremity constraint-induced movement therapy in a patient with subacute stroke. Phys Ther. 1999 Sep;79(9):847-53. — View Citation
Bridgers SL, Delaney RC. Transcranial magnetic stimulation: an assessment of cognitive and other cerebral effects. Neurology. 1989 Mar;39(3):417-9. — View Citation
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