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.
United States
Researchers study how speaking difficulties relate to learning to understand speech in people with Parkinson’s, to inform future treatment approaches.
Testing a treatment or activity
Age 45 years and over · Does not accept healthy volunteers
Czech Republic, Denmark, Netherlands, Portugal
Researchers are studying psilocybin with psychological support for depression in people with several serious conditions, including atypical Parkinson's.
Testing a treatment or activity
Age range not listed · Ask the team who can join
United States
Researchers compare two types of brain imaging in people with Parkinson’s and follow changes over time as part of a larger research programme.
Testing a treatment or activity
Age 18 years and over · Also accepts healthy volunteers
United States
Researchers are studying long-term use of buntanetap in selected people with Parkinson’s, including previous trial participants and people receiving implanted brain stimulation.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
Canada, Netherlands
This early study checks whether the experimental medicine ALN-SNCA can be given safely and tolerated by adults with early Parkinson’s.
Testing a treatment or activity
Ages 50 years to 80 years · Does not accept healthy volunteers
United States
Researchers test a liquid study medicine containing low-dose carbon monoxide under clinical supervision, measuring safety and how the body handles it.
Testing a treatment or activity
Ages 40 years to 80 years · Does not accept healthy volunteers
United States
Researchers compare two doses of a resveratrol product with an inactive treatment in people with Parkinson’s, with a focus on safety.
Testing a treatment or activity
Ages 55 years to 85 years · Does not accept healthy volunteers
United States
Researchers examine a Parkinson’s-related protein in skin samples to study whether it helps identify people with essential tremor who later develop Parkinson’s.
Learning by observing or collecting information
Ages 50 years to 85 years · Does not accept healthy volunteers
United States
People already scheduled for brain stimulation surgery have additional temporary recordings and stimulation so researchers can learn about movement control.
Testing a treatment or activity
Ages 18 years to 75 years · Does not accept healthy volunteers
United States
Researchers are studying the course of movement disorders, including how symptoms develop and how these conditions may run in families.
Learning by observing or collecting information
Ages 2 years to 100 years · Also accepts healthy volunteers
Hong Kong
Researchers collect information on Parkinson’s-related and other brain conditions to better understand their development and changes over time.
Learning by observing or collecting information
Ages 18 years to 80 years · Also accepts healthy volunteers
United States
Researchers use a type of brain scan to compare markers of inflammation in people with conditions that damage brain cells and healthy volunteers.
Testing a treatment or activity
Ages 18 years to 99 years · Also accepts healthy volunteers
Switzerland
Researchers compare therapy involving horses with usual care, looking at walking, balance, movement and quality of life in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers study whether stimulation applied through the head affects finding words, thinking, sensation and movement control in people with Parkinson’s.
Testing a treatment or activity
Ages 50 years to 90 years · Does not accept healthy volunteers
Argentina, Austria, Germany, Italy + 4 more
Researchers collect worldwide treatment results from people using the Vercise brain stimulation system for Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
Australia, France, United Kingdom
Researchers are testing the study medicine MTX325 as a possible future treatment aimed at changing the course of Parkinson’s.
Testing a treatment or activity
Ages 18 years to 75 years · Also accepts healthy volunteers
Pakistan
Researchers compare benzhexol and procyclidine for tremor in people with Parkinson’s who already take levodopa.
Testing a treatment or activity
Ages 40 years to 70 years · Does not accept healthy volunteers
United States
Researchers are testing automated adjustments to stimulation settings in people with Parkinson’s who have a Percept brain stimulator.
Testing a treatment or activity
Ages 25 years to 75 years · Does not accept healthy volunteers
United States
Researchers are studying a simplified system that adjusts implanted brain stimulation over a full day in people with Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Canada
Researchers are studying whether a particular rhythm of implanted brain stimulation can affect thinking abilities in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 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: 2026-10-11
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.