Working… Menu

Spinal Cord Stimulation and Functional MRI

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01512121
Recruitment Status : Completed
First Posted : January 19, 2012
Last Update Posted : September 23, 2019
Information provided by (Responsible Party):
Vibhor Krishna, Ohio State University

Brief Summary:
The overall objective of this study is to assess patterns of fMRI cortical activation with spinal cord stimulation (SCS) in patients with neuropathic leg pain and therefore define cortical correlates, as well as to investigate cortical representations of pain and pain relief and the interactions therein, in the setting of neuropathic leg pain and SCS.

Condition or disease
Complex Regional Pain Syndrome (CRPS) Neuropathic Leg Pain

Detailed Description:
The main objective is to define, using functional magnetic resonance imaging, the effects of spinal cord stimulation (SCS) on cortical and subcortical BOLD effects in patients with neuropathic leg pain. Our hypothesis is that SCS will demonstrate a consistent pattern of BOLD activation that will correlate with symptomatic improvement.

Layout table for study information
Study Type : Observational
Actual Enrollment : 10 participants
Observational Model: Other
Time Perspective: Prospective
Official Title: Investigating the Cortical Correlates of Spinal Cord Stimulation Using Functional Magnetic Resonance Imaging
Actual Study Start Date : September 2011
Actual Primary Completion Date : August 2017
Actual Study Completion Date : August 2017

Resource links provided by the National Library of Medicine

functional MRI testing
fMRI scanning with SCS "on" and "off" at different settings.

Primary Outcome Measures :
  1. Effects of spinal cord stimulation on patients with neuropathic leg pain through fMRI analysis [ Time Frame: 1 year ]
    We are analyzing the data from fMRI scans to understand more the functional activation of the cerebral cortex

Information from the National Library of Medicine

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, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients with implanted spinal cord stimulators

Inclusion Criteria:

  • Age 18-55 years at time of enrollment.
  • Have previous implantation of thoracic epidural Medtronic Restore Ultra, Prime Advanced and Restore Advanced SCS in place for the treatment of CPRS-type 1 or chronic refractory neuropathic leg pain following FBSS. The implantation must be 3 or more months prior to enrollment.
  • Patient must have reported significant pain improvement (>50%) following implantation of the SCS.
  • Have consistently reproducible pain relief (> 50%) within 10 minutes of switching SCS from an OFF state to an ON state (with "optimal" parameters - see below).
  • The SCS battery is implanted in the buttocks region.
  • Unilateral or bilateral extremity pain.
  • Able to provide informed consent.

Exclusion Criteria:

- Contraindication to MRI such as: SCS lead in the cervical epidural region Cardiac pacemaker Intracranial aneurysm clips, metallic implants or external clips within 10mm of the head Metallic foreign metals within the orbits Pregnancy; (urine pregnancy test will be done to confirm) Claustrophobia

  • Pattern of response to spinal cord stimulation Inconsistent response of pain to spinal cord stimulation Long interval (> 10 minutes) before pain relief following switching SCS from an OFF state to an ON state (with "optimal" parameters) - long "washout" period Lack of significant pain improvement (< 50%) following implantation of SCS
  • Positive history of significant brain lesions or pathology including:
  • Prior ablative neurosurgery
  • History of large vessel strokes or brain tumors
  • Psychological Screening

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01512121

Layout table for location information
United States, Ohio
The Ohio State Medical Center
Columbus, Ohio, United States, 43210
Sponsors and Collaborators
Vibhor Krishna
Layout table for investigator information
Principal Investigator: Vibhor Krishna, MD Ohio State University

Layout table for additonal information
Responsible Party: Vibhor Krishna, Assistant Professor of Neurological Surgery, Ohio State University Identifier: NCT01512121     History of Changes
Other Study ID Numbers: 2011H0040
First Posted: January 19, 2012    Key Record Dates
Last Update Posted: September 23, 2019
Last Verified: September 2019
Additional relevant MeSH terms:
Layout table for MeSH terms
Complex Regional Pain Syndromes
Reflex Sympathetic Dystrophy
Autonomic Nervous System Diseases
Nervous System Diseases
Peripheral Nervous System Diseases
Neuromuscular Diseases