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Cognitive style, cortical function, and electroconvulsive therapy.

K P O'Connor, N Colter, J C Shaw

    The Journal of Nervous and Mental Disease
    |December 1, 1984
    PubMed
    Summary
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    Electroconvulsive therapy (ECT) and antidepressant drugs improved performance in depressive patients. Bilateral ECT showed greater improvement than unilateral ECT, suggesting treatment effects depend on cognitive style.

    Area of Science:

    • Neuroscience
    • Psychiatry
    • Cognitive Psychology

    Background:

    • Depression is associated with cognitive impairments.
    • The Rod and Frame Test (RFT) assesses perceptual orientation and cognitive style.
    • Different treatments for depression may differentially affect cognitive function.

    Purpose of the Study:

    • To investigate the effects of bilateral electroconvulsive therapy (ECT), unilateral ECT, and antidepressant drugs on cognitive performance in depressive patients.
    • To examine how treatment modality influences perceptual orientation and cognitive style as measured by the RFT.
    • To determine if pretreatment cognitive style moderates the treatment effects of ECT.

    Main Methods:

    • Three groups of 20 depressive patients received bilateral ECT, unilateral ECT, or antidepressant drugs.

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  • A nonpatient control group was included for comparison.
  • The Rod and Frame Test (RFT) was administered before treatment, 1 week post-treatment, and at 3-month follow-up.
  • RFT performance was scored for mean absolute error, frame dependence, rod dependence, and constant error.

    • Main Results:

    • All depressive patient groups showed improved RFT error measures after treatment.
    • Electroconvulsive therapy (ECT) groups exhibited reduced frame dependence compared to the drug group.
    • Bilateral ECT resulted in a greater reduction in mean error than unilateral ECT.
    • Right-sided unilateral ECT influenced frame dependence differently based on initial patient cognitive style.

    Conclusions:

    • Both ECT and antidepressant drugs can improve cognitive performance in depression.
    • ECT appears to be more effective than antidepressant drugs in reducing perceptual disorientation.
    • The efficacy of ECT may be influenced by the patient's baseline cognitive style, particularly their initial frame dependence.