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 2026-10-13 (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.
Italy
Researchers compare stimulation approaches used without surgery in people with Parkinson’s and balance or walking difficulties.
Testing a treatment or activity
Ages 45 years to 85 years · Also accepts healthy volunteers
Germany, Netherlands, Switzerland
Researchers analyse voice recordings from people taking part in a Parkinson’s study of brain stimulation and impulse-control problems.
Testing a treatment or activity
Ages 18 years to 70 years · Does not accept healthy volunteers
United States
Researchers study a computer-analysis platform for identifying dystonia, a movement disorder that can involve unwanted muscle contractions.
Testing a treatment or activity
Age range not listed · Also accepts healthy volunteers
United States
Researchers examine brain activity associated with control of responses and other non-movement symptoms in Parkinson’s and essential tremor.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Switzerland
Researchers study whether an approach focused on understanding others and treating oneself kindly affects quality of life in Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
Czech Republic
Researchers study visual feedback from the SpiroGym app during training of the muscles used to breathe out.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers study whether turning on an additional stimulation electrode in a specific brain area affects difficulty sleeping.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
France
Researchers study continuous stimulation using a directional electrode in a deep movement-related brain area in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 70 years · Does not accept healthy volunteers
Italy
Researchers analyse genes, proteins and other biological information to identify mechanisms and markers of conditions affecting brain cells.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
China
Researchers study whether images of the back of the eye can help identify Parkinson’s at an earlier stage.
Learning by observing or collecting information
Ages 40 years to 80 years · Also accepts healthy volunteers
United States
Participants try prototype devices that deliver targeted mechanical stimulation while researchers assess usability and effects on shaking.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Egypt
Researchers investigate metformin as a treatment approach in people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 70 years · Does not accept healthy volunteers
Taiwan
Researchers study stimulation near the upper-back part of the spinal cord in people with advanced Parkinson’s and walking freezes.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
Canada
Researchers combine biological measurements and computer models to predict changes across conditions that cause thinking difficulties and dementia.
Learning by observing or collecting information
Ages 30 years to 95 years · Does not accept healthy volunteers
China
Researchers study nerve stimulation at the ear, timed with breathing, to examine apathy and other non-movement symptoms in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 90 years · Does not accept healthy volunteers
Sweden
Researchers test whether a new imaging substance can safely and reliably measure accumulated alpha-synuclein protein.
Testing a treatment or activity
Age 20 years and over · Also accepts healthy volunteers
France
Researchers investigate immune-system changes in people with Parkinson’s taking clozapine.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Egypt
Researchers track changes in standing balance after high-frequency magnetic stimulation in people with Parkinson’s.
Testing a treatment or activity
Ages 55 years to 70 years · Does not accept healthy volunteers
United States
Researchers test whether tributyrin affects memory, thinking, walking and balance in people with Parkinson’s who have thinking difficulties.
Testing a treatment or activity
Age 45 years and over · Does not accept healthy volunteers
United States
Researchers follow people using ONAPGO, which delivers apomorphine under the skin, to learn about their experiences in everyday care.
Learning by observing or collecting information
Age 18 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: 2026-10-13
4689 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-13
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.