Role of Dopamine Receptors in Primary Focal Dystonias

This study is not yet open for participant recruitment. (see Contacts and Locations)
Verified August 2011 by Washington University School of Medicine
National Institute of Neurological Disorders and Stroke (NINDS)
Information provided by:
Washington University School of Medicine Identifier:
First received: June 10, 2011
Last updated: August 2, 2011
Last verified: August 2011

Dystonia is a disabling movement disorder characterized by repetitive patterned or sustained muscle contractions causing twisting or abnormal postures that may afflict 250,000 people in the U.S. While the pathophysiology of dystonia remains uncertain the treatment is rather rudimentary. A better understanding of neural mechanisms of dystonias is not only an invaluable prerequisite for developing better treatment options but also a step toward better understanding of the complex network of basal ganglia. In this study I will investigate if there is any difference between the dopamine receptors and dopamine in people with dystonia and healthy subjects.

Focal Dystonias

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Role of Dopamine Receptors in Primary Focal Dystonias

Resource links provided by NLM:

Further study details as provided by Washington University School of Medicine:

Estimated Enrollment: 40
Study Start Date: September 2011
Estimated Primary Completion Date: April 2016 (Final data collection date for primary outcome measure)
healthy controls
patients with focal dystonias


Ages Eligible for Study:   21 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Any healthy control or patient with primary focal dystonia or arm or face.


Inclusion Criteria:

  • Age >20
  • Male or Female
  • Any race or ethnicity
  • Primary focal dystonia (arm or cranial)
  • Ability to give informed consent

Exclusion criteria:

  • Family history of dystonia
  • Pregnancy (confirmed with negative urine pregnancy test in women of child bearing potential), breastfeeding
  • Exposure to radiation therapy
  • Any MRI contraindications such as foreign metallic implants, pacemaker, and aneurysm clip etc.
  • History of cardiac disease, uncontrolled hypertension, abnormal EKG during screening phase
  • History of exposure to any drugs affecting dopaminergic systems within the last 6 months (e.g. dopamine receptor blocking agents, cocaine, amphetamine, tetrabenazine, reserpine, L-dopa, dopamine agonists, as they might affect the dopamine receptor binding or endogenous dopamine).
  • Active depression (Beck Depression Inventory_II >14)
  • Cognitive impairment (Mini-Mental State Score <27)
  • CNS active medications such as gabapentin or narcotics, muscle relaxants which might be given for pain in the 3 days prior to study
  • History of stroke, seizure, cerebral palsy, generalized dystonia, parkinsonism, inability to hold head still during the scanning time.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01373840

Contact: Pratt Stacey 314-747-5916

United States, Missouri
Washington University Not yet recruiting
St. Louis, Missouri, United States, 63141
Contact: Stacey Pratt    314-747-5916   
Principal Investigator: Morvarid Karimi, MD         
Sponsors and Collaborators
Washington University School of Medicine
National Institute of Neurological Disorders and Stroke (NINDS)
Principal Investigator: Morvarid Karimi, MD Washington University School of Medicine
  More Information

No publications provided

Responsible Party: Morvarid Karimi, MD, Washington University Identifier: NCT01373840     History of Changes
Other Study ID Numbers: 201102481
Study First Received: June 10, 2011
Last Updated: August 2, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by Washington University School of Medicine:

Additional relevant MeSH terms:
Dystonic Disorders
Central Nervous System Diseases
Movement Disorders
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Dopamine Agents
Autonomic Agents
Cardiotonic Agents
Cardiovascular Agents
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Protective Agents
Therapeutic Uses processed this record on October 06, 2015