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 2026-10-12 (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.
United States
Researchers study whether stimulation applied through the ear is practical to use at home and affects Parkinson’s symptoms.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
China
Researchers collect information on multiple system atrophy, a condition that can cause Parkinson-like symptoms, to better understand its course.
Learning by observing or collecting information
Ages 40 years to 75 years · Also accepts healthy volunteers
United States
Researchers record brain activity to study how people with Parkinson’s process rewards and make decisions involving risk.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
United States
Researchers record activity in connected brain areas to learn about thinking difficulties in Parkinson’s.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
United States
Researchers compare people with and without a particular LRRK2 genetic change to study differences in a brain chemical signalling system.
Learning by observing or collecting information
Age 45 years and over · Does not accept healthy volunteers
Brazil
Researchers study how walking-stick use and training affect the way people with Parkinson’s walk.
Testing a treatment or activity
Age 40 years and over · Does not accept healthy volunteers
United States
Researchers check the safety and imaging properties of a new scan substance in Parkinson’s and related conditions.
Testing a treatment or activity
Ages 50 years to 80 years · Also accepts healthy volunteers
Argentina, South Korea, Spain, United States
Researchers study how symptoms change in conditions linked to buildup of alpha-synuclein, a protein involved in Parkinson’s and related disorders.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
United States
People who already have a Percept RC brain stimulator take part in research on sleep in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers study remotely delivered rehabilitation that uses physical or touch feedback to support movement practice in Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Australia, United States
Researchers compare increasing single doses of SER-252 with an inactive treatment in people whose movement symptoms fluctuate.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers combine behavioural tasks with recordings from implanted brain stimulators to study motivation and choices in Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
China
Researchers study the safety and effects of a stimulation method aimed at deep brain areas in people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 85 years · Does not accept healthy volunteers
Norway
Researchers compare D-serine with an inactive treatment to investigate whether it changes the course of Parkinson’s.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
Switzerland
Researchers check the early safety and movement effects of ARC-IM spinal cord stimulation in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Germany
Researchers study a structured programme that strengthens muscles used to breathe out, examining its effects on swallowing in Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Taiwan
Researchers study a combination of a probiotic and nutritional ingredients in early Parkinson’s, investigating its effects rather than assuming it slows the condition.
Testing a treatment or activity
Ages 30 years to 85 years · Does not accept healthy volunteers
Turkey
Researchers study whether practising two tasks at once affects arm function and muscle measurements in people with Parkinson’s.
Testing a treatment or activity
Ages 40 years to 65 years · Does not accept healthy volunteers
Hong Kong
Researchers study a mindfulness programme done by people with Parkinson’s together with their caregivers, looking at several aspects of wellbeing.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers study brain networks involved in implanted stimulation to help improve device settings for walking and balance difficulties in Parkinson’s.
Testing a treatment or activity
Age 21 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: 2026-10-12
4689 related source records before matching duplicates
Import available
Last complete check: 2026-10-12
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-12
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.