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Parkinson's patients help unlock the Brain's inner clock

NCT ID NCT02126475

Knowledge-focused Sponsor: Institut National de la Santé Et de la Recherche Médicale, France Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how Parkinson's disease changes the way people perceive time. Researchers measured eye movements in 40 participants (Parkinson's patients and healthy volunteers) to understand the role of dopamine in timing. Patients were tested both on and off their medication to see how dopamine affects their ability to anticipate events. The goal was to learn more about how the brain processes time, not to test a new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

40 people

The number who actually took part.

Started

Apr 2014

Finished

Feb 2016

Lead sponsor

A government agency

The lead sponsor is a government body.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Healthy volunteers and Parkinson patients, non fluctuent

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Healthy volunteers : * Men or women, age: 18 to 65 years old * Subject affiliated to a national insurance scheme * Informed consent of the study signed * Normal neurological exam 2. Patients: * Men or women, age: 18 to 65 years old * Subject affiliated to a national insurance scheme * Informed consent of the study signed * Idiopathic Parkinson disease, UKPDSBB criteria (Hughes, Ben-Shlomo, Daniel, \& Lees, 1992; Hughes, Daniel, Kilford, \& Lees, 1992; Hughes, Daniel, \& Lees, 2001) * Non fluctuant patients * Patients treated by L-Dopa +/- other anti-Parkinsonian's, stable dose for 30 days Exclusion Criteria: * Cognitive or behavioural disorder * Severe psychiatric symptomatology and psychotropic drug use * Subject non-affiliated to a national insurance scheme * No signature of the Informed consent of the study * Subject freedom-deprived by court or administrative order

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Conditions

The condition(s) this trial relates to.

Parkinson disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Healthy Parkinsons disease

Contacts and locations

Locations

  • ICM

    Paris, 75013, France

  • ICM-IHU

    Paris, 75013, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.