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Depression and hemispheric functions: changes associated with unilateral ECT.

Z Kronfol, K D Hamsher, K Digre

    The British Journal of Psychiatry : the Journal of Mental Science
    |June 1, 1978
    PubMed
    Summary
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    Electroconvulsive therapy (ECT) can improve right hemispheric functions in depressed patients. Initially disturbed right-brain functions showed improvement after ECT, regardless of the stimulation side.

    Area of Science:

    • Neuroscience
    • Psychiatry
    • Cognitive Psychology

    Background:

    • Depression is often associated with altered brain function.
    • The impact of electroconvulsive therapy (ECT) on hemispheric function requires further clarification.
    • Pre-existing abnormalities in right hemispheric functions may be present in depression.

    Purpose of the Study:

    • To investigate the effect of unilateral ECT on hemispheric functions in patients with depression.
    • To determine if ECT impacts dominant (left) versus non-dominant (right) hemispheric functions differently.
    • To assess whether ECT ameliorates pre-existing functional disturbances.

    Main Methods:

    • A comparative study involving two groups of nine depressed patients each.
    • One group received ECT targeting the dominant (left) hemisphere.

    Related Experiment Videos

  • The other group received ECT targeting the non-dominant (right) hemisphere.
  • Neuropsychological tests were administered pre- and post-ECT to assess hemispheric functions.

    • Main Results:

    • Pre-ECT assessments revealed more frequent abnormalities in right hemispheric functions compared to left.
    • ECT administered to either the right or left side resulted in improved right hemispheric functions.
    • Functional improvements correlated with the amelioration of depressive symptoms.

    Conclusions:

    • Right hemispheric functions appear to be initially disturbed in depression.
    • ECT does not appear to be detrimental to right hemispheric functions.
    • ECT may actively improve right hemispheric functions as depression symptoms lessen.