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.
France
Researchers use brain scans to compare people with Parkinson’s who do and do not have pain linked to the condition.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Taiwan
Researchers study control of muscles at the side of the hip in healthy adults and people with Parkinson’s.
Learning by observing or collecting information
Ages 20 years to 85 years · Also accepts healthy volunteers
United States
Researchers compare changes in movement, fitness and quality of life after different exercise programmes for people with Parkinson’s.
Testing a treatment or activity
Age 50 years and over · Does not accept healthy volunteers
United States
Researchers compare two sets of stimulation settings and their effects on Parkinson’s symptoms in people receiving usual brain stimulation care.
Testing a treatment or activity
Ages 18 years to 85 years · Does not accept healthy volunteers
United States
Researchers study a computer-guided approach to adjusting implanted brain stimulators in people with Parkinson’s.
Testing a treatment or activity
Ages 18 years to 89 years · Does not accept healthy volunteers
Canada
Researchers compare a supplement containing several strains of microorganisms with a comparison treatment, looking at depression and related mood symptoms.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers use specialised scans to study differences in brain changes associated with dementia in people with Parkinson’s.
Learning by observing or collecting information
Age 50 years and over · Also accepts healthy volunteers
United Kingdom
Researchers study a magnetic brain stimulation approach linked to the timing of shaking in people with Parkinson’s or essential tremor.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers compare walking to metronome beats while an implanted brain stimulator is switched on or off in people with Parkinson’s.
Testing a treatment or activity
Ages 18 years to 89 years · Does not accept healthy volunteers
United States
Researchers study attention, perception and thinking in people with Parkinson’s receiving implanted brain stimulation.
Testing a treatment or activity
Ages 19 years to 90 years · Also accepts healthy volunteers
United States
Researchers study an oral supplement intended to increase glutathione, a chemical involved in protecting cells, in people with early Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
Canada
Researchers study whether electrical stimulation applied through the head affects thinking abilities in Parkinson’s.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
Switzerland
Researchers compare sound stimulation during sleep with an inactive version alongside thinking training in people with mild Parkinson’s-related thinking difficulties.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Denmark
Researchers test the effects of daily pulsed electromagnetic stimulation applied to the brain in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Also accepts healthy volunteers
Israel
Researchers gather information about ambroxol use in people with Gaucher disease and Parkinson’s associated with changes in the GBA gene.
Learning by observing or collecting information
Up to age 100 years · Does not accept healthy volunteers
South Korea
Researchers tailor magnetic brain stimulation to individual abilities and study its effects on walking in Parkinson’s.
Testing a treatment or activity
Age 50 years and over · Does not accept healthy volunteers
United Kingdom
Researchers study a brain-training approach aimed at balance difficulties in people with Parkinson’s.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
Turkey
Researchers test the safety and effects of the EarStim system for relief of Parkinson’s movement symptoms.
Testing a treatment or activity
Age 44 years and over · Does not accept healthy volunteers
Italy
Researchers examine posture, thinking and biological markers in early Parkinson’s to investigate patterns described as starting in the brain or body.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers study training for listeners as a way to make communication easier for people whose speech is affected by Parkinson’s.
Testing a treatment or activity
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.