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Related Experiment Videos

Tardive dyskinesia and dementia.

O O Famuyiwa, D Eccleston, A A Donaldson

    The British Journal of Psychiatry : the Journal of Mental Science
    |December 1, 1979
    PubMed
    Summary

    Schizophrenic patients with tardive dyskinesia (TD) showed worse learning abilities and more brain abnormalities, suggesting chronic neuroleptic toxicity may cause these issues.

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    Area of Science:

    • Neuroscience
    • Psychiatry
    • Radiology

    Background:

    • Schizophrenia is a complex mental disorder often treated with neuroleptic medications.
    • Tardive dyskinesia (TD) is a potential side effect of long-term neuroleptic use.
    • Cognitive deficits and brain changes are observed in schizophrenia, but their relation to TD requires further investigation.

    Purpose of the Study:

    • To investigate cognitive function and brain structure in schizophrenic patients with and without tardive dyskinesia.
    • To explore the potential link between chronic neuroleptic toxicity and observed pathologies in TD patients.

    Main Methods:

    • Psychological testing was used to assess intellectual function in 17 schizophrenic patients with TD and 33 without TD.
    • Electro-Magnetic Imaging (EMI) scans were performed on all participants.
    • The Ventricular Index, a parameter derived from EMI scans, was used to quantify brain abnormalities.

    Main Results:

    • The overall group of schizophrenic patients exhibited signs of dementia.
    • 31 out of 45 patients showed abnormalities on their EMI scans.
    • Patients with TD performed significantly worse on a learning test compared to those without TD.
    • The TD group demonstrated greater abnormalities in the Ventricular Index, a measure of brain pathology.

    Conclusions:

    • The study suggests a higher incidence of brain pathology in schizophrenic patients with TD.
    • These findings may indicate a relationship between chronic neuroleptic toxicity and the development of TD and associated cognitive/neurological deficits.

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