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Related Concept Videos

Electroconvulsive Therapy01:30

Electroconvulsive Therapy

Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early years,...

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Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
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EVALUTION OF UNILATERAL ELECTRO-CONVULSIVE THERAPY (A double blind study).

S B Chatterjee1, E Mohammed

  • 1Classified Specialist (Psychiatry), Command Hospital Lucknow, India.

Indian Journal of Psychiatry
|November 8, 2011
PubMed
Summary

Electroconvulsive therapy (ECT) techniques showed similar efficacy for schizophrenia and depression. However, unilateral ECT on the non-dominant hemisphere notably improved immediate verbal recall memory.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Clinical Psychology

Background:

  • Electroconvulsive therapy (ECT) is a treatment for severe mental health conditions.
  • Different electrode placements in ECT, including bilateral and unilateral (dominant/non-dominant hemisphere), may influence treatment outcomes and side effects.
  • Understanding the differential effects of ECT electrode placement is crucial for optimizing patient care.

Purpose of the Study:

  • To compare the therapeutic efficacy of bilateral ECT versus unilateral ECT (non-dominant and dominant hemispheres) in patients with schizophrenia and depression.
  • To evaluate the impact of different ECT electrode placements on memory function, specifically immediate verbal recall.
  • To assess differences in recovery speed and electroencephalogram (EEG) changes across the three ECT techniques.

Main Methods:

  • A double-blind study involving 120 patients (90 with schizophrenia, 30 with depression) randomly assigned to three groups.
  • Group A received bilateral ECT, Group B received unilateral ECT on the non-dominant hemisphere, and Group C received unilateral ECT on the dominant hemisphere.
  • Patients were assessed for therapeutic efficacy, memory recall, recovery speed post-session, and EEG changes.

Main Results:

  • All three ECT techniques demonstrated comparable therapeutic efficacy for the patient groups studied.
  • No significant differences were observed in the speed of recovery or EEG alterations among the groups.
  • The unilateral non-dominant hemisphere ECT group showed a statistically significant improvement in immediate verbal recall memory compared to the other groups.

Conclusions:

  • Bilateral and unilateral ECT (non-dominant/dominant hemisphere) exhibit similar overall therapeutic effectiveness and physiological impact.
  • Unilateral ECT applied to the non-dominant hemisphere may offer a specific advantage in preserving or enhancing certain aspects of memory, particularly immediate verbal recall.
  • Further research is warranted to explore the neurobiological mechanisms underlying these memory-specific effects of unilateral ECT.