← Back to Search


Closed-Loop Deep Brain Stimulation for Essential Tremor

Waitlist Available
Led By Aysegul Gunduz, Ph.D
Research Sponsored by University of Florida
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
You are over 21 years of age.
You are diagnosed with a postural-intention (essential) tremor for at least 3 years and meet strict diagnostic criteria and have been seen and examined by a movement disorders fellowship trained neurologist.
Must not have
Any suspicion of Parkinsonian tremor, including presence of Parkinsonian features such as bradykinesia, rigidity, or postural instability.
Abnormal brain MRI including hydrocephalus, stroke, structural lesions, demyelinating lesions, or infectious lesions. Also excluded will be subjects with severe atrophy.
Screening 3 weeks
Treatment Varies
Follow Up 24 months post-surgery
Awards & highlights


This trial is testing a new, improved deep brain stimulator that only gives off pulses when the patient is actually experiencing tremors. The goal is to reduce side effects and improve quality of life for people with essential tremor.

Who is the study for?
This trial is for adults over 21 with severe essential tremor in the arms that hasn't improved after trying at least two medications, including propranolol or primidone. Participants must have had this condition for at least three years and be able to attend all study follow-ups. Pregnant individuals, those with substance abuse issues, major health problems, previous brain surgeries, Parkinsonian features, recent seizures or psychosis are not eligible.Check my eligibility
What is being tested?
The study tests a new 'closed-loop' deep brain stimulation device designed to treat arm tremors by delivering electrical impulses only when needed. This could reduce side effects compared to traditional continuous stimulation and extend battery life of the device.See study design
What are the potential side effects?
Potential side effects may include slurred speech and difficulty walking due to unnecessary current delivery from traditional deep brain stimulation devices; however, the closed-loop system aims to minimize these by providing targeted treatment.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
I am over 21 years old.
I have had essential tremor for over 3 years, diagnosed by a specialist.
I have a severe hand tremor that hasn't improved with medication for over 3 months.
My tremor in the limb I want treated scores at least 2 on a specific scale.
My tremor hasn't improved after trying two medications, including propranolol or primidone.

Exclusion Criteria

You may be eligible for the trial if you check “No” for criteria below:
I may have symptoms like slow movement, stiffness, or balance problems.
My brain MRI does not show severe issues like hydrocephalus, stroke, or severe atrophy.
I have had brain surgery or treatments that target brain tissue.
I do not have uncontrolled symptoms like headaches or nausea.
I have had a seizure in the last year.
I experience involuntary movements due to my medication.


Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~24 months post-surgery
This trial's timeline: 3 weeks for screening, Varies for treatment, and 24 months post-surgery for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Clinical Rating Scale for Tremor (CRST) for closed-loop deep brain stimulation
Clinical Rating Scale for Tremor (CRST) for continuous deep brain stimulation

Trial Design

1Treatment groups
Experimental Treatment
Group I: Deep brain stimulationExperimental Treatment2 Interventions
All participants will undergo unilateral deep brain stimulation (DBS) implantation for essential tremor. Medtronic Summit RC+S devices will be used because these are capable of recording brain signals, as well as delivering DBS. Participants will receive continuous (open-loop) and closed-loop deep brain stimulation interventions, which will be compared for efficacy.
First Studied
Drug Approval Stage
How many patients have taken this drug
Deep brain stimulation
Completed Phase 3

Find a Location

Who is running the clinical trial?

University of FloridaLead Sponsor
1,354 Previous Clinical Trials
713,326 Total Patients Enrolled
9 Trials studying Essential Tremor
439 Patients Enrolled for Essential Tremor
MedtronicIndustry Sponsor
611 Previous Clinical Trials
828,869 Total Patients Enrolled
5 Trials studying Essential Tremor
147 Patients Enrolled for Essential Tremor
National Institute of Neurological Disorders and Stroke (NINDS)NIH
1,349 Previous Clinical Trials
648,157 Total Patients Enrolled
21 Trials studying Essential Tremor
8,543 Patients Enrolled for Essential Tremor

Media Library

Closed-loop deep brain stimulation (Device) Clinical Trial Eligibility Overview. Trial Name: NCT02649166 — N/A
Essential Tremor Research Study Groups: Deep brain stimulation
Essential Tremor Clinical Trial 2023: Closed-loop deep brain stimulation Highlights & Side Effects. Trial Name: NCT02649166 — N/A
Closed-loop deep brain stimulation (Device) 2023 Treatment Timeline for Medical Study. Trial Name: NCT02649166 — N/A
~2 spots leftby Jul 2025