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NCT00634556 · ClinicalTrials.gov registry record · Phase 1
Dopaminergic Effects on Cortical Function in Tourette's (Levodopa Protocol)
A Phase 1 study, sponsored by Washington University School of Medicine.
- Completed
- Registry status
- Phase 1
- Development phase
- 49
- Enrollment target
NCT00634556: Completed Phase 1 study, sponsored by Washington University School of Medicine.
NCT00634556 is a Phase 1 study that has completed, run by Washington University School of Medicine. The registered enrollment target is 49 participants, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (18% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00634556, a Phase 1 study, has completed, sponsored by Washington University School of Medicine.
- COMPLETED
- Registry status
- Phase 1
- Development phase
- 49 participants
- Enrollment target
Study Summary
Dr. Kevin J. Black at Washington University is conducting a study to learn whether we can use MRI scans to test dopamine function in the brain and to determine whether the brain performs memory tasks differently in Tourette Syndrome (TS). TS is a movement disorder characterized by vocal tics (sounds) and motor tics (movements). We will measure how and where brain activity changes using magnetic resonance imaging (MRI) scans during memory tasks and after taking levodopa. Levodopa is a drug commonly used for the treatment of Parkinson's disease (PD), a very different movement disorder.
Interventions
- DRUG placebo
- DRUG levodopa solution 2mg/ml for i.v. use
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 49 participants |
| Start Date | 2006-02 |
| Est. Completion | 2010-10 |
| Phase | Phase 1 |
What the finished NCT00634556 record still lists
NCT00634556 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 49 participants, a relatively small participant target, below the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (18% lower).
The record links to 0 conditions, and to 2 interventions - of which placebo is the first listed.
NCT00634556 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00634556 about?
NCT00634556 is a clinical study titled "Dopaminergic Effects on Cortical Function in Tourette's (Levodopa Protocol)". Dr. Kevin J. Black at Washington University is conducting a study to learn whether we can use MRI scans to test dopamine function in the brain and to determine whether the brain performs memory tasks differently in Tourette Syndrome (TS). TS is a movement disorder characterized by vocal tics (sounds...
What is the current status of trial NCT00634556?
This trial is currently completed. It is a Phase 1 study. The enrollment target is 49 participants. The study started on 2006-02. Estimated completion is 2010-10.
What interventions are being tested in trial NCT00634556?
The interventions under investigation include: placebo (DRUG), levodopa solution 2mg/ml for i.v. use (DRUG).
Who is sponsoring clinical trial NCT00634556?
This trial is sponsored by Washington University School of Medicine, which has 1,502 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00634556's enrollment target sits among peer trials
49 1017th of 2000 higher than 976 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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