Properties of auditory brainstem responses evoked by intra-operative electrical stimulation of the cochlear nucleus in human subjects

Electroencephalography and Clinical Neurophysiology
M D Waring

Abstract

Electrically evoked auditory brainstem response (EABR) testing can aid placement of the stimulating electrodes during surgical implantation of an auditory brainstem implant (ABI). To facilitate efficient testing, this study of EABR properties examined the effects of various stimulating and recording parameters on the magnitude and clarity of the EABRs obtained from 9 successive ABI patients during intra-operative monitoring. Both stimulus polarities elicited EABRs; the response waveforms were similar and no significant differences between the latencies were found. Stimulus-response relationships displayed thresholds and non-linear growth, characteristic of neural activity, and provided a stimulus amplitude that elicited readily detectable EABRs in all subjects. The stimulus rate could be increased without degrading the EABRs, but usually 50 Hz was used with a 10 ms sampling sweep so that muscle responses, which occurred later than EABRs, could be detected. When 3 stimulating electrodes in a line were tested, the pair with the largest separation consistently provided the largest response. A recording filter passband of 10-3000 Hz was useful for attenuating interference signals because there is negligible energy in the EABR at fr...Continue Reading

Citations

Jul 22, 1998·Progress in Neurobiology·P Heiduschka, S Thanos
Feb 5, 2008·Cochlear Implants International·Jane BradleyMary Bell
Oct 18, 2014·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Robert BehrHenryk Skarzynski
Oct 22, 2008·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Steven R OttoDerald E Brackmann
Nov 30, 2016·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Eric P WilkinsonUNKNOWN Los Angeles Pediatric ABI Team
Aug 14, 2012·Current Opinion in Otolaryngology & Head and Neck Surgery·Liliana CollettiVittorio Colletti
Oct 4, 2014·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Claire E IseliCraig A Buchman

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