TAKE PART IN RESEARCH
Research explained in everyday language. Explore what teams around the world are trying to learn, who can take part and how to get in touch.
Browse worldwide registries ↓Registry records retrieved 2026-10-11 (UTC). Individual records may have older updates. Recruitment and eligibility must be confirmed with the study team.
A location is a starting point. Ask the team whether that site is accepting people and whether you can take part from where you live.
Introductions are AI-written from the registry in everyday language and have not been independently checked by a clinician. Open any study for its full name, original description and participation rules.
Studies name Parkinson’s or a related condition. Some include other conditions or healthy volunteers. Country filters include sites with matching or unreported recruitment status and exclude known closed sites.
United States
Researchers are studying a simplified system that adjusts implanted brain stimulation over a full day in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Canada
Researchers are studying whether a particular rhythm of implanted brain stimulation can affect thinking abilities in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
Luxembourg
Researchers collect health assessments, biological samples, genetic information and digital measurements to understand Parkinson’s and support earlier detection and better treatment research.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
Switzerland
Researchers study whether feedback about brain activity, recorded through implanted stimulation electrodes, can help people learn to influence that activity.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers are studying stimulation that uses two frequencies in people with Parkinson’s who receive implanted brain stimulation.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers compare the study medicine VIM0423 with an inactive treatment, checking tremor, safety and how the body handles the medicine.
Testing a treatment or activity
Ages 18 years to 65 years · Does not accept healthy volunteers
Spain
Researchers assess sleep problems in people with advanced Parkinson’s receiving foslevodopa and foscarbidopa through the skin.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers are studying a wearable feedback device for swallowing rehabilitation in people with Parkinson’s or stroke.
Testing a treatment or activity
Ages 50 years to 90 years · Does not accept healthy volunteers
Germany, United Kingdom
Researchers collect everyday treatment results from procedures that use radiofrequency energy to treat targeted tissue in the brain and nervous system.
Learning by observing or collecting information
Age range not listed · Does not accept healthy volunteers
Austria
Researchers study the safety and immune effects of the TRB-001 vaccine in people who previously received treatment targeting a Parkinson’s-related protein.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United Kingdom
Researchers are studying digital tools for monitoring speech difficulties in people with Parkinson’s and other conditions affecting the nervous system.
Learning by observing or collecting information
Age 16 years and over · Also accepts healthy volunteers
United States
Researchers compare high-detail and standard brain scans in people being studied for signs that can appear before a Parkinson’s diagnosis.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
China
Researchers examine whether scans using a study imaging substance can help identify disease-related changes linked to a particular enzyme.
Learning by observing or collecting information
Ages 18 years to 90 years · Also accepts healthy volunteers
United States
Researchers study an experimental medicine in adults whose movement symptoms still fluctuate despite adjustments to their usual Parkinson’s treatment.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
Czechia
Researchers study tests that could help identify early changes associated with Parkinson’s or multiple sclerosis in people who drive.
Learning by observing or collecting information
Ages 18 years to 85 years · Does not accept healthy volunteers
China
Researchers study imaging substances designed to help detect changes associated with alpha-synuclein, a protein linked to Parkinson’s and related conditions.
Learning by observing or collecting information
Ages 18 years to 80 years · Also accepts healthy volunteers
United States
People with and without Parkinson’s report information online so researchers can better understand who develops the condition and how it changes.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
Canada, Israel, United States
Researchers collect genetic information related to Parkinson’s in a central resource for future studies.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Switzerland
Researchers study changes in thinking and psychiatric symptoms in people with Parkinson’s receiving implanted brain stimulation.
Testing a treatment or activity
Ages 18 years to 75 years · Does not accept healthy volunteers
United States
Researchers in the United States observe how Parkinson’s changes in people whose movement symptoms continue despite standard medication.
Learning by observing or collecting information
Ages 45 years to 75 years · Does not accept healthy volunteers
EXTEND YOUR SEARCH
The listings above come from ClinicalTrials.gov, which includes international studies. They are not an exhaustive worldwide list. Use WHO’s international search and these regional registries to find studies registered elsewhere. These links open separate registries; their records are not yet imported here.
Search for Parkinson disease and check recruitment status, local sites and eligibility. The same study can appear in several registries.
Registry directory based on the WHO primary registry network. Links checked against the directory on 11 October 2026.