Noting symptoms and taking a series of thorough medical histories are the basis for diagnosing Tourette's. There is no definitive diagnostic test. However, certain blood tests, other laboratory studies, or neuroimaging techniques may be conducted to eliminate related disorders with similar symptoms.
According to the Tourette Syndrome Study Group (1993), certain criteria must be fulfilled for the diagnosis of definite TS. These include the following:
- The presence of multiple motor tics and one or more vocal tics at some time during the course of the disorder that are...
- Unexplained by other medical conditions
- Directly observed by a reliable examiner or recorded (e.g., by videotape)
- The occurrence of tic episodes several times daily, almost every day, or periodically during a period of more than 1 year
- Changes in the type, severity, complexity, frequency, and anatomical location of tics during the course of the disorder
- Symptom onset before age 18
WEMOVE (Worldwide Education and Awareness for Movement Disorders
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