Effects of Deep Brain Stimulation (DBS) Frequency on Neural Synchrony (DBS)

March 7, 2019 updated by: Helen M. Bronte-Stewart, Stanford University
The purpose of this study is to evaluate the effects of low frequency deep brain stimulation on subthalamic nucleus neural synchrony. Low frequency stimulation does not improve the cardinal motor signs of Parkinson's disease, and may be beneficial only for gait and speech. This study will provide insight into what the effects of low frequency stimulation are on neural synchrony.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

9

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Stanford, California, United States, 94305
        • Stanford University Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • A diagnosis of idiopathic Parkinson's disease, with bilateral symptoms at Hoehn and Yahr Stage greater than or equal to II.
  • Documented improvement in motor signs on versus off dopaminergic medication, with a change in the Unified Parkinson's Disease Rating Scale motor (UPDRS III) score of >= 30% off to on medication.
  • The presence of complications of medication such as wearing off signs, fluctuating responses and/or dyskinesias, and/or medication refractory tremor, and/or impairment in the quality of life on or off medication due to these factors.
  • Subjects should be on stable doses of medications, which should remain unchanged until the DBS system is activated. After the DBS system is optimized (during which time the overall medication dose may be reduced to avoid discomfort and complications such as dyskinesias) the medication dose should remain unchanged, if possible, for the duration of the study.
  • Treatment with carbidopa/levodopa, and with a dopamine agonist at the maximal tolerated doses as determined by a movement disorders neurologist.
  • Age > 18

Exclusion Criteria:

  • Subjects with significant cognitive impairment and/or dementia as determined by a standardized neuropsychological battery.
  • Subjects with clinically active depression, defined according to the Diagnostic and Statistical manual of Mental Disorders, Fourth Edition (DSM-IV) criteria and as scored on a validated depression assessment scale.
  • Subjects with very advanced Parkinson's disease, Hoehn and Yahr stage 5 on medication (non-ambulatory).
  • Age > 80.
  • Subjects with an implanted electronic device such as a neurostimulator, cardiac pacemaker/defibrillator or medication pump.
  • Subjects, who are pregnant, are capable of becoming pregnant, or who are breast feeding.
  • Patients with cortical atrophy out of proportion to age or focal brain lesions that could indicate a non-idiopathic movement disorder as determined by MRI
  • Subjects having a major comorbidity increasing the risk of surgery (prior stroke, severe hypertension, severe diabetes, or need for chronic anticoagulation other than aspirin).
  • Subjects having any prior intracranial surgery.
  • Subjects with a history of seizures.
  • Subjects, who are immunocompromised.
  • Subjects with an active infection.
  • Subjects, who require diathermy, electroconvulsive therapy (ECT), or transcranial magnetic stimulation (TMS) to treat a chronic condition.
  • Subjects, who have an inability to comply with study follow-up visits.
  • Subjects, who are unable to understand or sign the informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: DBS (Deep Brain Stimulation)
DBS ( Deep Brain Stimulation) ( both high and low frequency deep brain stimulation will be applied to the subthalamic nucleus)
Other: DBS (Deep Brain Stimulation)
Applying low frequency and high frequency deep brain stimulation to subthalamic nucleus.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Low frequency stimulation versus no stimulation
Time Frame: 3 years
The changes in neuronal oscillations, measured in power (dB/Hz) and frequency (Hz), that are significantly different between periods of low frequency stimulation and periods of no stimulation - during rest - in people with Parkinson's disease off medications.
3 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Low frequency stimulation versus high frequency stimulation
Time Frame: 3 years
To determine if the effects of low frequency stimulation are due to using a lower total power delivered than normal therapeutic high frequency stimulation.
3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Stanford University

Investigators

  • Principal Investigator: Helen Bronte-Stewart, MD, MSE, FAAN, Stanford University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2012

Primary Completion (Actual)

November 28, 2017

Study Completion (Actual)

November 28, 2017

Study Registration Dates

First Submitted

August 6, 2014

First Submitted That Met QC Criteria

November 26, 2014

First Posted (Estimate)

December 2, 2014

Study Record Updates

Last Update Posted (Actual)

March 11, 2019

Last Update Submitted That Met QC Criteria

March 7, 2019

Last Verified

March 1, 2019

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 60130

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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