Brainstem auditory evoked potentials

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Brainstem auditory evoked potentials (BAEPs) have obtained widespread clinical application in assessing neurologic and audiologic problems. Seven waves (I-VII) are usually recorded in the first 10 ms following broad-band and high-intensity clicks. Latencies of waves I, III, and V, interpeak latencies of I-III, III-V, and I-V, and the amplitude ratio of wave V to wave I are common parameters evaluated for assessing clinically relevant abnormalities of BAEPs. Usually two-channel recordings are obtained: vertex (Cz) to ipsilateral ear and Cz to contralateral earlobe derivation. Evaluating different components in the two derivations helps their identification, particularly when the BAEPs are abnormal. Several technical and subject-related factors affect the amplitude and latencies of BAEP components besides lesions and dysfunctions involving the peripheral auditory structures and brainstem auditory pathways. BAEPs have maximal clinical utility in evaluating comatose patients, in patients with suspected demyelinating disorders, posterior fossa tumors, or in audiologic evaluation, especially in infants. They are also used for intraoperative monitoring of eighth-nerve and brainstem function during different types of posterior fossa surgery.

Original languageEnglish
Pages (from-to)319-342
Number of pages24
JournalJournal of Clinical Neurophysiology
Volume11
Issue number3
StatePublished - 1994

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Brain Stem Auditory Evoked Potentials
Brain Stem
Infratentorial Neoplasms
Intraoperative Monitoring
Auditory Pathways
Demyelinating Diseases
Coma
Nervous System
Ear

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Neuroscience(all)

Cite this

Brainstem auditory evoked potentials. / Markand, Omkar.

In: Journal of Clinical Neurophysiology, Vol. 11, No. 3, 1994, p. 319-342.

Research output: Contribution to journalArticle

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