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Related Experiment Videos

Brainstem auditory evoked responses in brainstem infarction.

E Faught, S J Oh

    Stroke
    |July 1, 1985
    PubMed
    Summary
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    Brainstem auditory evoked responses (BAERs) are valuable for diagnosing brainstem infarction, detecting lesions missed by physical exams and CT scans. This auditory test complements clinical findings, improving diagnostic accuracy for brainstem dysfunction.

    Area of Science:

    • Neurology
    • Neurophysiology

    Background:

    • Brainstem auditory evoked responses (BAERs) are electrophysiological tests assessing auditory pathway function.
    • Brainstem infarction diagnosis relies on clinical signs, neuroimaging (CT scans), and electrophysiological tests.

    Purpose of the Study:

    • To evaluate the utility of BAERs in localizing brainstem infarction.
    • To compare BAER findings with physical examination and CT scan results.

    Main Methods:

    • BAERs were recorded in 40 patients with clinically definite brainstem infarction.
    • Results were correlated with clinical localizations and CT scan findings.

    Main Results:

    • BAERs were abnormal in 92% of patients with lateral pontine or midbrain lesions.

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  • Normal BAERs were observed in medial or medullary lesions.
  • BAERs identified additional affected areas in 25% of patients, while physical signs revealed unindicated damage in 22% of patients.
  • BAERs were abnormal in more patients than CT scans.

    • Conclusions:

    • BAERs complement physical examination findings for brainstem infarction localization.
    • BAERs are a useful tool for confirming clinical impressions in suspected brainstem infarction.
    • BAERs offer diagnostic value beyond CT scans in specific cases of brainstem infarction.