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.
Belgium
Researchers test high-resolution imaging in healthy ageing and several neurological and mental-health conditions.
Testing a treatment or activity
Ages 18 years to 90 years · Also accepts healthy volunteers
Italy
Researchers study whether remotely delivered rehabilitation with a virtual-reality app affects thinking performance and social skills in people with thinking difficulties.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Sweden
Researchers study ways to assess thinking in people with neurological conditions or injuries without requiring them to travel for an appointment.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
Turkey
Researchers study a rehabilitation approach that supports people with Parkinson’s in organising exercise independently.
Testing a treatment or activity
Ages 45 years to 80 years · Does not accept healthy volunteers
United States
Researchers compare varenicline with an inactive treatment in a selected Parkinson’s group, studying falls and doing another task while walking.
Testing a treatment or activity
Age 45 years and over · Does not accept healthy volunteers
United States
Researchers study exercise that challenges balance while restricting blood flow, examining effects in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
United States
Researchers study patterned sensory stimulation as an approach to movement and thinking difficulties in Parkinson’s.
Testing a treatment or activity
Ages 45 years to 90 years · Does not accept healthy volunteers
United States
Researchers test whether recordings of brain activity can help programme implanted stimulators for Parkinson’s more effectively.
Testing a treatment or activity
Ages 21 years to 89 years · Does not accept healthy volunteers
Italy
Researchers collect treatment results across centres to understand what influences outcomes after neurosurgical care.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Italy
Researchers collect genetic information and use reprogrammed cells to investigate how combinations of inherited differences may contribute to Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Also accepts healthy volunteers
United States
Researchers check the safety and tolerability of transplanting nerve-cell precursors made from a person’s own cells into the brain.
Testing a treatment or activity
Ages 45 years to 80 years · Does not accept healthy volunteers
United States
Researchers record brain activity to learn how the brain processes speech and produces it.
Testing a treatment or activity
Ages 18 years to 85 years · Does not accept healthy volunteers
Taiwan
Researchers study connections between thinking abilities, brain activity and walking while doing another task in Parkinson’s.
Learning by observing or collecting information
Ages 40 years to 80 years · Also accepts healthy volunteers
Brazil
Researchers compare stimulation at the neck and upper back when combined with magnetic brain stimulation, measuring everyday mobility in Parkinson’s.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
France
Researchers study continuous apomorphine delivery under the skin as part of care for people with Parkinson’s near the end of life.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Canada
Researchers compare a study diet with a standard diet over time, checking practicality and effects in people with Parkinson’s.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Canada
Researchers study a music-based approach for apathy, which can involve reduced interest or motivation in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
Belgium
Researchers examine whether signals recorded in deep brain areas can help select stimulation contacts for people with Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Taiwan
Researchers compare an online programme with task-focused training at a clinic for people with early Parkinson’s.
Testing a treatment or activity
Ages 45 years to 70 years · Does not accept healthy volunteers
Japan, United States
Researchers collect safety and treatment outcomes after an ultrasound procedure targeting one side of the brain for advanced Parkinson’s movement complications.
Learning by observing or collecting information
Ages 30 years to 99 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: 2026-10-13
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.