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Tourette's syndrome. Some new concepts.

I J Butler

    Neurologic Clinics
    |August 1, 1984
    PubMed
    Summary

    Tourette's syndrome (TS) is a childhood-onset neurologic disorder characterized by motor and vocal tics. Research suggests dopamine receptor overactivity may underlie TS, prompting investigation into new neuroimaging treatments.

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    Area of Science:

    • Neurology
    • Neuroscience
    • Genetics

    Background:

    • Tourette's syndrome (TS) is a chronic neurologic disorder presenting with motor and vocal tics, typically beginning in childhood and persisting into adulthood.
    • TS predominantly affects males and often has a familial pattern, with increased awareness due to educational efforts.
    • The disorder's clinical features, neurophysiologic factors, and response to haloperidol suggest an underlying neurotransmitter metabolism disorder.

    Purpose of the Study:

    • To investigate the potential role of neurotransmitter metabolism, specifically dopamine pathways, in the pathophysiology of Tourette's syndrome.
    • To explore the hypothesis of relative dopamine receptor overactivity as a contributing factor to TS.
    • To examine the potential of novel neuroimaging techniques for localizing dopamine receptor abnormalities in TS patients.

    Main Methods:

    • Review of clinical and experimental studies examining neurotransmitter metabolism in Tourette's syndrome.
    • Analysis of neurophysiologic factors and patient demographics associated with TS.
    • Exploration of the application of new neuroimaging techniques for patients with TS.

    Main Results:

    • Findings are consistent with a defect in the development of mesocortical dopamine neurons.
    • Evidence suggests a relative overactivity of dopamine receptors in individuals with Tourette's syndrome.
    • Haloperidol treatment has shown a frequent and dramatic response in tic reduction, supporting neurotransmitter involvement.

    Conclusions:

    • A defect in dopamine neuron development and dopamine receptor overactivity are potential underlying mechanisms for Tourette's syndrome.
    • Advanced neuroimaging techniques hold promise for identifying specific dopamine receptor locations in TS.
    • Localization of dopamine receptor abnormalities could lead to more targeted and effective treatment strategies for Tourette's syndrome.

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