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Related Experiment Videos

Auditory evoked potentials in epileptic patients

S Soliman1, M Mostafa, N Kamal

  • 1Ear, Nose, and Throat Department, AinShams University, Cairo, Egypt.

Ear and Hearing
|August 1, 1993
PubMed
Summary
This summary is machine-generated.

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Epileptic patients often have elevated auditory brain stem response (ABR) and middle latency response (MLR) thresholds, indicating hearing issues despite normal audiograms. This is more common in grand mal epilepsy and linked to illness duration.

Area of Science:

  • Neuroscience
  • Audiology
  • Epileptology

Background:

  • Epilepsy can affect auditory processing.
  • Hearing sensitivity is typically assessed using pure-tone audiograms.
  • Auditory brain stem response (ABR) and middle latency response (MLR) provide objective measures of auditory pathway function.

Purpose of the Study:

  • To investigate auditory pathway function in epileptic patients using ABR and MLR.
  • To determine the prevalence of elevated ABR and MLR thresholds in epilepsy.
  • To explore correlations between auditory thresholds and epilepsy type, chronicity, and medication.

Main Methods:

  • Recorded ABR and MLR in 49 epileptic patients.
  • Evoked responses at 90 dB nHL down to threshold.

Related Experiment Videos

  • Compared results with pure-tone audiograms.

    • Main Results:

    • 30.1% of patients had elevated ABR thresholds and 40.7% had elevated MLR thresholds.
    • Threshold elevations occurred despite normal pure-tone audiograms.
    • Elevated thresholds were more frequent in grand mal epilepsy than temporal lobe epilepsy.
    • Chronicity of illness correlated with elevated thresholds in grand mal epilepsy.
    • Antiepileptic drug effects were not significantly related to elevated thresholds.

    Conclusions:

    • Epilepsy is associated with subclinical auditory pathway dysfunction.
    • Grand mal epilepsy and illness chronicity are risk factors for auditory pathway abnormalities.
    • Neurotransmitter disturbances and efferent pathway inhibition may underlie these findings.