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Auditory brainstem evoked potentials in leprosy.

P R Bartel1, M K Baker, P Combrink

  • 1Division of Neurology, University of Pretoria, RSA.

South African Medical Journal = Suid-Afrikaanse Tydskrif Vir Geneeskunde
|May 21, 1988
PubMed
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This study found no significant differences in auditory pathway conduction times for leprosy patients compared to controls. However, some patients showed abnormalities, possibly indicating caudal pathway dysfunction.

Area of Science:

  • Neuroscience
  • Audiology
  • Clinical Electrophysiology

Background:

  • Leprosy can affect the nervous system, potentially impacting auditory pathways.
  • Brainstem Auditory Evoked Potential (BAEP) is a key electrophysiological tool for assessing auditory pathway function.

Purpose of the Study:

  • To investigate auditory nerve and brainstem auditory pathway conduction in leprosy patients using BAEP.
  • To determine if leprosy significantly alters auditory pathway electrophysiology.

Main Methods:

  • Electrophysiological assessment using Brainstem Auditory Evoked Potential (BAEP).
  • Study included 47 leprosy patients and a control group.
  • Analysis focused on interpeak latencies (conduction times) within the auditory pathways.

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Main Results:

  • No statistically significant differences in mean interpeak latencies between leprosy patients and controls.
  • Abnormalities in interpeak latencies were observed in 3 leprosy patients.
  • Two patients showed signs of caudal pathway dysfunction (abnormal I-III interpeak latency), but not specific auditory nerve involvement (abnormal I-II interpeak latency).

Conclusions:

  • Leprosy, in this cohort, did not demonstrate a statistically significant impact on overall auditory nerve and brainstem auditory pathway conduction times.
  • Observed abnormalities in a subset of patients suggest potential localized dysfunction, warranting further investigation.
  • The findings do not exclude subclinical auditory pathway involvement in leprosy.