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.
United States
Researchers apply gentle electrical stimulation to the ear and study effects on decision-making, problem-solving and other thinking abilities.
Testing a treatment or activity
Ages 18 years to 65 years · Also accepts healthy volunteers
China
Researchers study whether stimulation delivered outside the brain’s protective covering affects movement symptoms in Parkinson’s.
Testing a treatment or activity
Ages 40 years to 75 years · Does not accept healthy volunteers
Switzerland
Participants use a sensor headband and headphones while researchers investigate whether enhancing deep sleep affects changes linked to Parkinson’s risk or early Parkinson’s.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
France
Researchers use movement sensors to investigate internal tremor, a sensation of shaking that may not be readily visible, in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 years · Also accepts healthy volunteers
France
Researchers study electrical spinal cord stimulation in people with Parkinson’s whose trunk bends forward when standing or walking and causes pain.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Israel
Researchers check whether home walking practice guided by an app is practical, whether people keep using it and its early effects.
Testing a treatment or activity
Ages 40 years to 85 years · Does not accept healthy volunteers
United States
Researchers study leg-muscle activation in Parkinson’s and whether vagus nerve stimulation changes muscle activity and posture.
Testing a treatment or activity
Ages 21 years to 76 years · Also accepts healthy volunteers
United States
Researchers study daily behaviours, social experiences and changes in functioning among adults with Parkinson’s.
Learning by observing or collecting information
Age 40 years and over · Also accepts healthy volunteers
United Kingdom
Researchers compare measurements from sensor-equipped socks with other assessments to see whether they are useful in Parkinson’s care.
Learning by observing or collecting information
Age 50 years and over · Also accepts healthy volunteers
United Kingdom
Researchers check the accuracy and consistency of wearable-sock measurements for mobility assessment and possible prediction of falls in Parkinson’s.
Learning by observing or collecting information
Age 50 years and over · Does not accept healthy volunteers
Switzerland
Researchers study recordings from brain areas to understand changing movement, thinking and psychiatric symptoms in Parkinson’s.
Learning by observing or collecting information
Ages 18 years to 80 years · Does not accept healthy volunteers
Denmark
Researchers study reward signals and how their patterns differ between healthy people and people with Parkinson’s.
Learning by observing or collecting information
Age 35 years and over · Also accepts healthy volunteers
Italy
Researchers translate and test a questionnaire for assessing gut and digestive symptoms in people with Parkinson’s.
Learning by observing or collecting information
Age 18 years and over · Does not accept healthy volunteers
United States
Researchers examine tissue collected during routine colonoscopy for signs linked to Parkinson’s or a dream-sleep movement disorder.
Learning by observing or collecting information
Ages 40 years to 99 years · Does not accept healthy volunteers
United States
Researchers study whether tissue taken during routine colonoscopy contains protein changes that could help identify Parkinson’s.
Learning by observing or collecting information
Ages 40 years to 99 years · Does not accept healthy volunteers
Denmark
Researchers study whether a particular pattern of magnetic brain stimulation affects slowness of movement in Parkinson’s.
Testing a treatment or activity
Ages 18 years to 80 years · Does not accept healthy volunteers
Canada
Researchers study how to optimise a scan using an imaging substance called fluorodopa in selected patient groups.
Testing a treatment or activity
Age range not listed · Does not accept healthy volunteers
China
Researchers test computer analysis of facial movements and speech as a way to distinguish Parkinson’s from similar conditions.
Learning by observing or collecting information
Ages 15 years to 75 years · Also accepts healthy volunteers
France
Researchers compare home rehabilitation using purpose-designed games with another approach, examining effects and costs in Parkinson’s.
Testing a treatment or activity
Age 18 years and over · Does not accept healthy volunteers
Turkey
Researchers study how water-based therapy affects everyday activities, walking, balance, posture, pain and depression in Parkinson’s.
Testing a treatment or activity
Ages 40 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: 2026-10-13
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.