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 2026-10-11 (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.
Japan
Researchers are studying substances in saliva that might help identify or understand Parkinson's.
Learning by observing or collecting information
Age 50years-old and over · Ask the team who can join
Japan
This study examines individual assessments and care from several health professionals for people with Parkinson's and related conditions.
Testing a treatment or activity
Age 40years-old and over · Ask the team who can join
Japan
Researchers are following symptoms, daily activities and health changes in people with advanced Parkinson's in Japan.
Learning by observing or collecting information
Age range not listed · Ask the team who can join
Asia (excluding Japan), Japan
This study follows how people with Parkinson's take part in meaningful activities and adapt their daily lives.
Learning by observing or collecting information
Age 35years-old and over · Ask the team who can join
Japan
Researchers are testing a needle-based treatment and measuring swallowing in people with Parkinson's.
Testing a treatment or activity
Ages 40years-old to 90years-old · Ask the team who can join
Japan
This study uses specialised scans to investigate brain support cells in dementia and psychiatric conditions.
Testing a treatment or activity
Ages 18years-old to 95years-old · Ask the team who can join
Japan
Researchers are comparing earlier and later fluid-drainage surgery in people with Parkinson's and normal-pressure hydrocephalus.
Testing a treatment or activity
Ages 60years-old to 90years-old · Ask the team who can join
Japan
Researchers are examining genes, body samples and health information to understand problems involving the energy-producing parts of cells.
Learning by observing or collecting information
Age range not listed · Ask the team who can join
Japan
This study compares Parkinson's movement scores estimated from blinking with assessments made by neurologists.
Learning by observing or collecting information
Ages 20years-old to 90years-old · Ask the team who can join
Japan, North America
Researchers are using scans and assessments to investigate motivation and a positive, forward-looking attitude.
Testing a treatment or activity
Age 18years-old and over · Ask the team who can join
Japan
People with advanced Parkinson's in Japan describe which treatment features are most important to them.
Learning by observing or collecting information
Age 30years-old and over · Ask the team who can join
Japan
Researchers are investigating brain responses to stimulation of a nerve involved in communication between the brain and body.
Testing a treatment or activity
Ages 18years-old to 65years-old · Ask the team who can join
Japan
This study compares swallowing still and carbonated liquids in people with neurological conditions.
Testing a treatment or activity
Ages 20years-old to 90years-old · Ask the team who can join
Japan
Researchers are testing whether adding electrical stimulation to exercise changes standing posture in Parkinson's.
Testing a treatment or activity
Age range not listed · Ask the team who can join
Japan
This study uses detailed moving scans to investigate swallowing and protection of the airway in Parkinson's.
Testing a treatment or activity
Age 20years-old and over · Ask the team who can join
Japan
Researchers are studying whether the LSVT BIG programme, which practises larger movements, affects thinking in Parkinson's.
Learning by observing or collecting information
Ages 40years-old to 90years-old · Ask the team who can join
Japan
This study investigates a community system for monitoring blood pressure and understanding heart and circulation risks.
Learning by observing or collecting information
Age 20years-old and over · Ask the team who can join
Japan
Researchers are studying this protective barrier and its relationship to thinking difficulties in neurological conditions.
Testing a treatment or activity
Age 18years-old and over · Ask the team who can join
Japan
This study investigates how Parkinson's medicines and smoking relate to a brain enzyme involved in breaking down chemical signals.
Testing a treatment or activity
Ages 50years-old to 90years-old · Ask the team who can join
Japan
Researchers are testing a trunk support device alongside walking and exercise for a forward-bent posture in Parkinson's.
Testing a treatment or activity
Ages 40years-old to 90years-old · 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: 2026-10-11
4689 related source records before matching duplicates
Update needs attention; retaining the last complete import
Last complete check: 2026-10-11
4384 related source records before matching duplicates
Import available
Last complete check: 2026-10-11
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.