Protocol Number: 02-N-0175

Title:

Study of Tics in Patients with Tourette's Syndrome and Chronic Motor Tic Disorder with [15O]H2O PET in Awake and in Sleep States

Number:

02-N-0175

Summary:

This study will investigate which areas of the brain are primarily involved in and responsible for tics in patients with Tourette's syndrome and chronic motor disorder. Tourette's syndrome is a neuropsychiatric disorder characterized by motor and vocal tics and is associated with behavioral and emotional disturbances, including symptoms of attention deficit hyperactivity disorder and obsessive-compulsive disorder. Chronic motor disorder has the same characteristics as Tourette's syndrome, except that patients do not have vocal tics.

Healthy normal volunteers and patients with Tourette's syndrome or chronic motor tic disorder between 18 and 65 years of age may be eligible for this study. Candidates will be screened with a medical history and physical and neurological examinations.

Participants will undergo positron emission tomography (PET) scanning to study tics under three conditions- spontaneous tics, suppression of tics, and sleep-to determine which areas of the brain are responsible for generation of tics. For this procedure, the subject is injected with H215O, a radioactive substance similar to water. A special camera detects the radiation emitted by the H215O, allowing measurement of brain blood flow. Subjects will receive up to 20 injections of H215O during the scanning.

Participants will be asked not to sleep the entire night before the test. Before the scan, both patients and volunteers will have EEG electrodes placed on their heads to record the electrical activity of their brains. Patients will also have EMG electrodes placed in areas of the body where tics occur. A small catheter (plastic tube) will be placed in an arm vein for injecting the radioactive tracers, and a mask will be placed on the face to help keep the head still during scanning. The mask has large openings for eyes, nose and mouth, so that it does not interfere with talking or breathing. The entire test takes about 4 hours. During this time, the subject will sleep for 1.5 hours either at the beginning or end of the scan. For the other 2.5 hours, scans will be done every 10 minutes for 1 minute under the different conditions of tic suppression or release of tics.

On a separate day, participants will also undergo magnetic resonance imaging (MRI), a diagnostic test that uses a magnetic field and radio waves to produce images of the brain. For this procedure, the subject lies still on a stretcher that is moved into the scanner (a narrow cylinder containing the magnet). Earplugs are worn to muffle loud noises caused by electrical switching of radio frequency circuits used in the scanning process. The scan lasts about 45 to 60 minutes.

Sponsoring Institute:

National Institute of Neurological Disorders and Stroke (NINDS)

Recruitment Detail

Type: Completed Study; data analyses ongoing

Gender: Male & Female

Referral Letter Required: No

Population Exclusion(s): Children

Eligibility Criteria: This study is not currently recruiting new subjects. If you have questions about participating in a study, please contact the Patient Recruitment and Public Liaison Office, CC.

Special Instructions:

Currently Not Provided

Keyword(s):

Tics

Basal Ganglia

Neuroimaging

Sleep

Suppression of Tics

Recruitment Keyword(s):

Tourette Syndrome

Tourette's Syndrome

Tics

Tic Disorder

Healthy Volunteer

HV

Normal Control

Condition(s):

Tourette Syndrome

Tic Disorders

Investigational Drug(s):

[O15] Water

Investigational Device(s):

None

Interventions:

None

Supporting Site:

National Institute of Neurological Disorders and Stroke

Contact(s):

This study is not currently recruiting new subjects. If you have questions about participating in a study, please contact the Patient Recruitment and Public Liaison Office, CC.

Citation(s):

Braun AR, Stoetter B, Randolph C, Hsiao JK, Vladar K, Gernert J, Carson RE,Herscovitch P, Chase TN The functional neuroanatomy of Tourette's syndrome: an FDG-PET study Neuropsychopharmacology 1993 Dec;9(4):277-91

Brett PM, Curtis D, Robertson MM, Gurling HM The genetic susceptibility to Gilles de la Tourette syndrome in a large multipleaffected British kindred Biol Psychiatry 1995 Apr 15;37(8):533-40

Goodman WK, Price LH, Rasmussen SA, Mazure C, Fleischmann RL, Hill CL,Heninger GR, Charney DS The Yale-Brown Obsessive Compulsive Scale I Development, use, and reliabilityArch Gen Psychiatry 1989 Nov;46(11):1006-11

• Questions about participating in a study, please contact the Patient Recruitment and Public Liaison Office, CC.
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