Journal article
Electrically Evoked Whole Nerve Action Potentials in Ineraid Cochlear Implant Users: Responses to Different Stimulating Electrode Configurations and Comparison to Psychophysical Responses
Journal of speech, language, and hearing research, Vol.39(3), pp.453-467
06/1996
DOI: 10.1044/jshr.3903.453
PMID: 8783126
Abstract
Electrically evoked whole nerve action potentials (EAP) have been recorded from 20 Ineraid cochlear implant users in response to bipolar and/or monopolar electrical stimulation of the cochlea. EAP growth functions and refractory recovery functions were obtained for a variety of different stimulating conditions. Where possible, parallel psychophysical experiments were conducted that measured the just detectable increment in stimulus current level (JND), forward-masking functions, and detection thresholds for a range of different stimuli. Variations in EAP threshold, slope of the EAP growth function, and the rate of recovery of the EAP from the refractory state were observed both across subjects for a given place and by mode of stimulation (bipolar versus monopolar), as well as across electrodes within a subject. A poor correlation between slope of the EAP growth functions and current JNDs was obtained. However, good correlations were observed between EAP threshold and psychophysical detection threshold and between the EAP refractory recovery functions and the psychophysical forward-masking functions. Our interpretation of these findings is that these particular physiological measures are related to the excitability of the auditory nerve to electrical stimulation and further that these measures are related to performance of cochlear implant patients on listening tasks. Consequently, such information may prove to be useful in adjusting the stimulation parameters of the cochlear implant speech processor in order to maximize an individual’s performance with the device.
Details
- Title: Subtitle
- Electrically Evoked Whole Nerve Action Potentials in Ineraid Cochlear Implant Users: Responses to Different Stimulating Electrode Configurations and Comparison to Psychophysical Responses
- Creators
- Carolyn J Brown - Department of Otolaryngology Head and Neck Surgery, University of Iowa, Iowa CityPaul J Abbas - Department of Otolaryngology Head and Neck Surgery and Department of Speech Pathology and Audiology, University of Iowa, Iowa CityJames Borland - Department of Otolaryngology Head and Neck Surgery, University of Iowa, Iowa CityMichael R Bertschy - Department of Otolaryngology Head and Neck Surgery, University of Iowa, Iowa City
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.39(3), pp.453-467
- DOI
- 10.1044/jshr.3903.453
- PMID
- 8783126
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Language
- English
- Date published
- 06/1996
- Academic Unit
- Communication Sciences and Disorders; Otolaryngology
- Record Identifier
- 9984002470602771
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