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Brain pacemaker tweak may ease Parkinson's without fogging thinking

NCT ID NCT04650932

Symptom relief Sponsor: University of California, Davis Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 15, 2026 · Updated 2 times

Summary

This study tests a new way to use deep brain stimulation (DBS) for Parkinson's disease. Standard DBS helps movement but can sometimes cause thinking or mood problems. The researchers will add low-frequency stimulation to a different part of the brain while keeping the usual high-frequency stimulation. Ten adults with Parkinson's who already have a DBS system will take part. The goal is to see if this dual approach is safe, tolerable, and better at preserving thinking and mood while still controlling movement symptoms.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 10 people

The number the study aims to enrol. It can still change while the study runs.

Started

Oct 2022

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Individuals who are 18 years and older * Individuals with idiopathic Parkinson's Disease who previously underwent implantation with the Boston Scientific VerciseTM DBS system * Individuals who have been implanted with the Boston Scientific VerciseTM DBS system for at least 3 months * Individuals diagnosed with advanced PD who had bilateral dorsal subthalamic nucleus DBS surgery, as standard of care for motor improvement, with distal contacts of the electrodes implanted into the ventral STN Exclusion Criteria: * Individuals unable to provide consent and/or lack capacity to consent * Individuals diagnosed with any cognitive or physical impairments that would limit their ability to participate in the cognitive testing * Individuals who score below 15 on the Montreal Cognitive Assessment Test-Blind * Individuals who score above 20 on the Center for Epidemiologic Studies Depression Scale * Pregnant women (note: pregnant women are not candidates for DBS surgery), and prisoners * Non-English speaking individuals. Cognitive tasks will only be conducted in English.

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Conditions

The condition(s) this trial relates to.

Parkinson disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Parkinson disease

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • UC Davis Health

    RECRUITING

    Sacramento, California, 95817, United States

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