ABR in multiple sclerosis. Ipsi- versus contralateral derivation

Scandinavian Audiology
A QuarantaG Longo

Abstract

Brainstem auditory evoked potentials (ABR) were recorded simultaneously between vertex and ear lobe, ipsi- and contralateral to the stimulated ear in 53 subjects with confirmed (19) or undefined (34) multiple sclerosis. Results were compared with those obtained in a control group of 20 normal-hearing adults. The control group showed that significant latency differences exist between ipsilateral and contralateral recordings. Definition of abnormality was based on absence and separation of waves. The results showed that the use of contralateral derivation in ABR recordings increased detectability from 74% to 89% in patients with confirmed MS and from 9% to 21% in cases of undefined MS. It is proposed that parameters of contralateral ABRs be included among the criteria used for the otoneurological diagnosis of patients with CNS lesions.

References

Jan 1, 1971·Brain : a Journal of Neurology·D L Jewett, J S Williston
Nov 1, 1980·Electroencephalography and Clinical Neurophysiology·D K Prasher, W P Gibson
Feb 1, 1981·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·S J PurvesB Reeves

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Citations

Jan 1, 1990·Scandinavian Audiology·V W Rawool, B B Ballachanda

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