Electrical Stimulation to Improve Hand Function in Patients With Chronic Stroke
Public ClinicalTrials.gov record NCT00023569. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Cortical Motor Reorganization in Chronic Stroke Following EMG Triggered NMES Therapy
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will determine whether an electric shock to the forearm can improve hand function in patients with chronic stroke and, if so, whether the improvement is related to brain reorganization. Some studies indicate that electromyography-triggered neuromuscular electrical stimulation (EMG-triggered NMES) on the forearm improves wrist motor function in patients with chronic stroke. The shock is delivered to the wrist extensor muscle of the forearm, causing greater hand movement than the patient can make on his or her own. The study will determine if the electric shock is more effective given after the patient initiates the hand movement (EMG-triggered NMES) than at times unrelated to patient effort (NMES alone). Stroke patients with muscle weakness on one side of the body may be eligible for this study. The stroke must have occurred at least 12 months before the patient enters the study. Candidates will have a medical history and physical and neurological examinations. Participants will be divided randomly into two groups: EMG-triggered NMES, and NMES alone. For EMG-triggered NMES, two electrodes from the NMES machine and two EMG electrodes are placed on the wrist extensor muscle of the forearm. The patient relaxes the hand, then contracts the wrist extensor muscle to produce movement. This movement triggers the NMES to deliver enough electrical stimulation to produce maximum wrist extension. For NMES alone, only the two NMES electrodes are placed on the forearm. The patient relaxes the hand and stimulation is applied at an intensity to produce full wrist extension without any patient effort. At the first clinic visit, baseline hand function is measured with the following tests: * Wrist extension - wrist extension is measured with a digital instrument called an accelerometer * Pinch power - grip strength between thumb and index finger is measured with a digital pinch analyzer * Jebsen-Taylor hand function - function is evaluated through activities such as moving a can and lifting a pin * H reflex - (Note: I could not find a description of this test or its purpose in the consent or the protocol) In addition, transcranial magnetic stimulation (TMS) is done to examine brain activity. For this test, an insulated wire coil is placed on the patient's scalp. A brief electrical current passes through the coil, creating a magnetic pulse that travels through the scalp and skull and causes small electrical currents in the outer part of the brain. The stimulation may cause muscle, hand or arm twitching, or may affect movement or reflexes. During the stimulation, electrical activity of muscles are recorded with a computer or other recording device, using electrodes attached to the skin with tape. Participants will be instructed in how to use the NMES machine at the first visit. They will be required to practice with the machine at home 30 minutes twice a day every day for 4 weeks, for a total of about 56 sessions. Follow-up evaluations of hand function will be done one day after the first NMES or EGM-triggered NMES task, then after 2 weeks and after 4 weeks of performing the exercise. These evaluations include the tests described above for baseline measurements, plus TMS.
Study identification
- NCT ID
- NCT00023569
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 16 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- Not listed
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 31, 2001
- Primary completion
- Not listed
- Completion
- Aug 31, 2003
- Last update posted
- Mar 3, 2008
2001 – 2003
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institute of Neurological Disorders and Stroke (NINDS) | Bethesda | Maryland | 20892 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00023569, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 3, 2008 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00023569 live on ClinicalTrials.gov.