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.
See worldwide coverage and update dates ↓Studies with early results appear under “Results reported” even if recruitment continues.
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 use sites with matching or unreported status. A country recorded by WHO does not confirm an open local site.
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
Canada, 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
Czech Republic
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
China
Researchers are checking whether the study tablet VG081821AC affects movement symptoms in people with early to middle-stage Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
Bulgaria, Germany, Poland, Spain
Researchers study whether IRL757 can be taken safely and tolerated by people with Parkinson’s who experience a lack of motivation or interest.
Testing a treatment or activity
Ages 50 years to 90 years · Does not accept healthy volunteers
United States
Researchers record brain activity around brain stimulation surgery to study how stimulation affects control over stopping responses in Parkinson’s.
Testing a treatment or activity
Ages 45 years to 75 years · Also accepts healthy volunteers
Italy
Researchers follow people during routine care to identify measurements that reflect changes in Parkinson’s and other conditions affecting brain cells.
Learning by observing or collecting information
Age 10 years and over · Does not accept healthy volunteers
WORLDWIDE COVERAGE
Studies are imported from ClinicalTrials.gov, WHO’s international collection and the European CTIS registry. WHO brings together national and regional registries, including records from Asia, Africa and Latin America. Recruiting and upcoming listings have English introductions; older records awaiting an introduction show their registry title.
We aim for broad worldwide coverage, but no registry includes every study. Unregistered studies, reporting delays and missing translations can leave gaps. A missing paper does not mean that no results exist.
Import available
Last complete check: 2026-10-11
4689 related source records before matching duplicates
Update needs attention; retaining the last complete import
Last complete check: 2026-10-11
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-11
73 related source records before matching duplicates
These dates show when WHO processed a registry’s data, not when every study was last updated. WHO’s “not recruiting” label does not distinguish planned, completed and follow-up studies.
Source attribution: WHO ICTRP ↗. The source records and processing dates remain available on each study page. English registration fields are preferred; original descriptions may include local-language material. Registry imports and paper matching run daily. New or changed descriptions enter an editorial queue.