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Related Experiment Videos

Brainstem auditory evoked potential in Japanese encephalitis.

J Kalita1, U K Misra

  • 1Department of Neurology, Sanjay Gandhi PGIMS, Lucknow, India.

Journal of the Neurological Sciences
|July 30, 1999
PubMed
Summary

Brainstem auditory evoked potential (BAEP) changes in Japanese encephalitis (JE) correlate with brainstem lesions. However, BAEP did not predict patient outcomes or coma severity in this study.

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Area of Science:

  • Neurology
  • Neurophysiology
  • Infectious Diseases

Background:

  • Japanese encephalitis (JE) frequently causes coma and brainstem involvement.
  • Brainstem auditory evoked potential (BAEP) can evaluate and monitor brainstem function.

Purpose of the Study:

  • To evaluate BAEP changes in adult JE patients.
  • To determine the role of BAEP in predicting patient outcomes.

Main Methods:

  • Twelve adult JE patients underwent neurological evaluation, CT, MRI, and BAEP.
  • Coma severity was assessed using the Glasgow Coma Scale (GCS).
  • Patient outcomes were defined as good or poor recovery after 3 months using the Barthel Index (BI).

Main Results:

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  • BAEP abnormalities, specifically reduced V/I amplitude ratio, were observed in five patients.
  • These BAEP abnormalities correlated with brainstem lesions identified on CT or MRI.
  • BAEP findings did not correlate with the severity of coma (GCS scores) or patient outcomes (BI scores).

    • Conclusions:

    • Reduced V/I amplitude ratio in BAEP may indicate raised intracranial tension or brainstem involvement in JE.
    • BAEP changes are associated with structural brainstem lesions in JE.
    • BAEP is not a reliable predictor of clinical outcomes or coma severity in Japanese encephalitis.