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Abnormal auditory brain-stem responses in hallucinating schizophrenic patients.

L Lindstrom1, I Klockhoff, A Svedberg

  • 1Psychiatric Research Center, University of Uppsala, Sweden.

The British Journal of Psychiatry : the Journal of Mental Science
|July 1, 1987
PubMed
Summary

Schizophrenia patients often show abnormal auditory brain-stem responses (ABRs). These brainstem auditory pathway issues may cause auditory hallucinations in schizophrenia.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Auditory Neuroscience

Background:

  • Schizophrenia is a complex mental disorder with diverse symptoms.
  • Auditory hallucinations are a common and distressing symptom in schizophrenia.
  • The underlying neurobiological mechanisms of schizophrenia, particularly auditory hallucinations, require further investigation.

Purpose of the Study:

  • To investigate auditory brain-stem responses (ABRs) in patients with schizophrenia.
  • To explore potential correlations between ABR abnormalities and clinical characteristics of schizophrenia.
  • To determine the relationship between ABR pathology and the presence of auditory hallucinations.

Main Methods:

  • Auditory brain-stem responses (ABRs) were measured in 20 patients diagnosed with schizophrenia.

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  • Patients were assessed for psychopathology, schizophrenia subtype, age, sex, cerebral ventricular enlargement, and medication history.
  • Statistical analysis was used to identify correlations between ABR findings and clinical variables, particularly auditory hallucinations.

    • Main Results:

    • Abnormal ABRs were observed in 10 out of 20 schizophrenic patients.
    • No significant correlation was found between ABR abnormalities and psychopathology, schizophrenia subtype, age, sex, or ventricular enlargement.
    • A statistically significant relationship was identified between abnormal ABRs and auditory hallucinations; 9 of 11 patients with hallucinations had abnormal ABRs.

    Conclusions:

    • Brain-stem dysfunction appears to be implicated in the psychopathology of schizophrenia.
    • Abnormalities in the auditory pathways of the brain-stem may contribute to the generation of auditory hallucinations in schizophrenic patients.
    • Further research into brain-stem function in schizophrenia is warranted.