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Safety and Effectiveness of Cortical Stimulation in the Treatment of Stroke Patients With Upper Extremity Hemiparesis (EVEREST)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified December 2007 by Northstar Neuroscience.
Recruitment status was:  Active, not recruiting
Information provided by:
Northstar Neuroscience Identifier:
First received: September 9, 2005
Last updated: December 18, 2007
Last verified: December 2007
The purpose of this study is to assess the safety and effectiveness of cortical stimulation delivered concurrent with rehabilitation activities to enhance motor recovery in patients suffering from hemiparesis affecting the upper extremity following a stroke.

Condition Intervention Phase
Device: Cortical Stimulation and rehabilitation
Other: Rehabilitation
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Safety and Effectiveness of Targeted Sub-Threshold Epidural Cortical Stimulation Delivered Concurrent With Rehabilitation Activities to Enhance Motor Recovery in Patients Suffering From Upper Extremity Hemiparesis Following a Stroke

Resource links provided by NLM:

Further study details as provided by Northstar Neuroscience:

Primary Outcome Measures:
  • Arm Motor Fugl-Meyer (AMFM) score [ Time Frame: Follow Up Week 4 ]
  • Arm Motor Ability Test (AMAT) score [ Time Frame: Follow Up Week 4 ]

Secondary Outcome Measures:
  • Box and Block Test score [ Time Frame: Follow Up Week 4 ]
  • Stroke Specific Quality of Life (SSQOL) score [ Time Frame: Follow Up Week 4 ]
  • Serious adverse event rate [ Time Frame: Follow up week 4 and 6 months ]

Estimated Enrollment: 174
Study Start Date: September 2004
Estimated Study Completion Date: March 2008
Arms Assigned Interventions
Active Comparator: Control Other: Rehabilitation
Rehabilitation is for 2.5 hrs per day for 26 days over a period of 6 weeks.
Other Name: Post-stroke rehabilitation.
Experimental: Investigational Device: Cortical Stimulation and rehabilitation
Cortical stimulation is provided concomitantly with rehabilitation therapy. Rehabilitation is for 2.5 hrs per day for 26 days over a period of 6 weeks.
Other Name: Renova-ST Cortical Stimulation System

Detailed Description:

Stroke is a leading cause of serious, long-term disability in the United States. According to the American Stroke Association, the prevalence of stroke in the U.S. is approximately 4.8 million with approximately 700,000 additional strokes occurring annually. The 2001 overall death rate for stroke was 58%. Of those who survive, 30 to 50 percent do not regain functional independence, 15 to 30 percent are permanently disabled, and 20% require institutional care at three months after onset.

The most common neurological deficit among these stroke survivors, and thus a substantial contributor to post-stroke disability, is a motor weakness on one (hemiparesis) side of the body. Presently, the only treatment available for patients with motor deficits is rehabilitative therapy. However, many patients are not responsive to standard rehabilitative therapy or achieve a less than satisfactory improvement in function.

The primary objective of this study is to determine the safety and effectiveness of targeted sub-threshold epidural cortical stimulation delivered concurrent with rehabilitation activities to enhance motor recovery in patients suffering from hemiparesis (a motor weakness in one half of the body) affecting the upper extremity (shoulder, arm, wrist, hand) following a stroke. In addition to evaluating changes from baseline level, safety and efficacy measures will be compared to patients who undergo the same rehabilitation activities but without cortical stimulation. The two study groups will be compared to determine the degree to which motor function of the affected limb can be improved beyond rehabilitation alone by epidural stimulation of a targeted cortical region.


Ages Eligible for Study:   21 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects must have an ischemic stroke.
  • Moderate to moderately severe upper-extremity hemiparesis.
  • Aged 21 years or older.

Exclusion Criteria:

  • Primary hemorrhagic stroke.
  • Any additional stroke associated with incomplete motor recovery.
  • Any neurologic or physical condition impairing function of the target extremity.
  • History of seizure disorder.
  • History of spinal cord injury, traumatic brain injury, or spontaneous subdural or epidural hematoma that has resulted in a neurologic deficit.
  • Contraindication to magnetic resonance (MR) imaging.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00170716

  Show 21 Study Locations
Sponsors and Collaborators
Northstar Neuroscience
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: VP Clinical Affairs, Northstar Neuroscience Identifier: NCT00170716     History of Changes
Other Study ID Numbers: V0267
Study First Received: September 9, 2005
Last Updated: December 18, 2007

Keywords provided by Northstar Neuroscience:
Motor Cortex Electrical Stimulation
Ischemic Stroke
Upper Extremity Hemiparesis
Motor Recovery
Functional MRI

Additional relevant MeSH terms:
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases
Neurologic Manifestations
Signs and Symptoms processed this record on April 28, 2017