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.
China
Researchers compare a controlled flickering-light treatment with a comparison treatment to study insomnia and safety in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 75 years · Does not accept healthy volunteers
China
Researchers study a method that briefly changes blood flow in a limb, looking at sleep and other non-movement symptoms in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 70 years · Does not accept healthy volunteers
Austria, Canada, France, Germany + 10 more
Researchers collect repeated health assessments, digital measurements, scans and biological information to understand how Parkinson’s develops and changes.
Learning by observing or collecting information
Age 30 years and over · Also accepts healthy volunteers
Italy
Researchers review records to study how often cancer occurs in people with Parkinson’s who carry a particular change in the GBA1 gene.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Italy
Researchers study whether a detailed eye-imaging test can help with diagnosis and monitoring across neurological conditions, including Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
Turkey
Researchers assess whether a Turkish version of a heat-sensitivity questionnaire works reliably for people with Parkinson’s.
Learning by observing or collecting information
Ages 40 years to 85 years · Does not accept healthy volunteers
United States
Researchers compare insulin and glutathione given through the nose with an inactive treatment, checking safety and effects in Parkinson’s.
Testing a treatment or activity
Age 30 years and over · Does not accept healthy volunteers
United States
Researchers compare usual stimulation patterns with research patterns in people already receiving brain stimulation treatment for Parkinson’s.
Testing a treatment or activity
Ages 19 years to 80 years · Also accepts healthy volunteers
China
Researchers study a stimulation approach in people with Parkinson’s or Parkinson-like symptoms caused by another condition.
Testing a treatment or activity
Up to age 85 years · Does not accept healthy volunteers
United States
Researchers study changes in speech and swallowing associated with implanted brain stimulation in people with Parkinson’s.
Testing a treatment or activity
Ages 45 years to 85 years · Does not accept healthy volunteers
Germany
Researchers are investigating whether scans for amyloid, a protein that can build up in the brain, help guide care.
Testing a treatment or activity
Age range not listed · Ask the team who can join
Italy
Researchers study whether stimulation applied through the ear adds to walking rehabilitation and affects brain function in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
Bulgaria, Germany, Poland, Spain
This study investigates the safety of IRL757 in people with Parkinson's who experience apathy, or reduced motivation.
Testing a treatment or activity
Age range not listed · Ask the team who can join
Turkey
Researchers assess whether a Turkish questionnaire reliably measures how confident people with Parkinson’s feel about their thinking abilities.
Learning by observing or collecting information
Ages 40 years to 85 years · Does not accept healthy volunteers
Turkey
Researchers study how activity, awareness of the body, imagined movement, fear of moving and symptom severity relate to frailty in Parkinson’s.
Learning by observing or collecting information
Ages 40 years to 85 years · Does not accept healthy volunteers
Turkey
Researchers study whether self-compassion and confidence in managing tasks are associated with symptoms, functioning and quality of life in Parkinson’s.
Learning by observing or collecting information
Ages 40 years to 85 years · Does not accept healthy volunteers
United States
Researchers study walking on a treadmill whose two sides move at different speeds to understand adjustment and freezing in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
United States
Researchers study whether a short course of an intensive magnetic stimulation approach is safe and useful for thinking difficulties in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 85 years · Does not accept healthy volunteers
China
Researchers compare implanted stimulation in two different brain areas for Parkinson’s in which shaking is a main symptom.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
Turkey
Researchers study mental rehearsal of movements as an approach to improving upper-limb skills in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 75 years · 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.