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 2026-10-14 (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.
Netherlands
This study uses high-strength magnetic resonance imaging to follow the course of Parkinson's.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study combines body samples, skin measures, treatment information and thinking assessments to investigate differences between people.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This early study compares an experimental medicine with placebo and investigates safety and effects in the body.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
This study compares sleep and health measures in people with and without a condition that causes movement during dreams.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are testing pelvic physiotherapy and electrical stimulation for urinary difficulties in Parkinson's.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are comparing ambroxol tablets with placebo to investigate treatment effects in this group.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are studying tilted sleeping positions for blood-pressure changes and night-time urination in Parkinson's.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
This study investigates whether a brief thinking assessment helps predict performance in an on-road driving test.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study combines assessments and brain scans to understand changes in thinking early in Parkinson's.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study compares ways of increasing daily steps, measured using participants' smartphones.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
Participants wear a research watch so researchers can follow movement and other body measurements over two years.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study investigates different external prompts and measures stepping and walking speed in Parkinson's.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are using brain scans and electrical recordings to compare people who experience hallucinations with those who do not.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are combining watches, movement sensors and clinical assessments to develop ways of forecasting changes.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study investigates brain mechanisms behind different treatment responses in Parkinson's tremor.
Testing a treatment or activity
Ages 18 to 99 · Ask the team who can join
Netherlands
Researchers are combining imaging and clinical assessments to investigate differences between groups of people with Parkinson's.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
Netherlands
This study compares lifetime exposures and genetic information in people with and without Parkinson's.
Learning by observing or collecting information
Ages 18 to 99 · Ask the team who can join
No potentially open locations reported
Researchers are studying stimulation treatment for movement symptoms in people who also have dementia.
Testing a treatment or activity
Age range not listed · Ask the team who can join
No potentially open locations reported
This study compares ways of directing stimulation and follows effects in advanced Parkinson's.
Testing a treatment or activity
Age range not listed · Ask the team who can join
No potentially open locations reported
Researchers are measuring magnetic signals from the brain in people with Parkinson's who have deep brain stimulation.
Testing a treatment or activity
Age range not listed · Ask the team who can join
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: 2026-10-14
4690 related source records before matching duplicates
Import available
Last complete check: 2026-10-14
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-14
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.