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Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited
The purpose of this study was to revisit the two-channel, simultaneous click-evoked extratympanic electrocochleography and auditory brainstem response (ECoG/ABR) recording technique for clinical use in normal hearing participants. Recording the compound action potential (AP) of the ECoG simultaneous...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
PAGEPress Publications, Pavia, Italy
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4627119/ https://www.ncbi.nlm.nih.gov/pubmed/26557358 http://dx.doi.org/10.4081/audiores.2015.105 |
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author | Minaya, Carlos Atcherson, Samuel R. |
author_facet | Minaya, Carlos Atcherson, Samuel R. |
author_sort | Minaya, Carlos |
collection | PubMed |
description | The purpose of this study was to revisit the two-channel, simultaneous click-evoked extratympanic electrocochleography and auditory brainstem response (ECoG/ABR) recording technique for clinical use in normal hearing participants. Recording the compound action potential (AP) of the ECoG simultaneously with ABR may be useful when Wave I of the ABR is small or diminished in patients with sensorineural or retrocochlear disorder and minimizes overall test time. In contrast to some previous studies that used the extratympanic electrode both as non-inverting electrode for the ECoG and inverting electrode for ABR, this study maintained separate recording channel montages unique to conventional click-evoked ECoG and ABR recordings. That is, the ABR was recorded using a vertical channel (Cz to ipsilateral earlobe), while the ECoG with custom extratympanic electrode was recorded using a horizontal channel (tympanic membrane to contralateral earlobe). The extratympanic electrode is easy to fabricate in-house, or can be purchased commercially. Maintaining the conventional ABR montage permits continued use of traditional normative data. Broadband clicks at a fixed level of 85 dB nHL were presented with alternating polarity at stimulus rates of 9.3, 11.3, and 15.3/s. Different stimulation rates were explored to identify the most efficient rate without sacrificing time or waveform morphology. Results revealed larger ECoG AP than ABR Wave I, as expected, and no significant difference across stimulation rate and no interaction effect. Extratympanic electrode placement takes little additional clinic time and may improve the neurodiagnostic utility of the ABR. |
format | Online Article Text |
id | pubmed-4627119 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | PAGEPress Publications, Pavia, Italy |
record_format | MEDLINE/PubMed |
spelling | pubmed-46271192015-11-09 Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited Minaya, Carlos Atcherson, Samuel R. Audiol Res Article The purpose of this study was to revisit the two-channel, simultaneous click-evoked extratympanic electrocochleography and auditory brainstem response (ECoG/ABR) recording technique for clinical use in normal hearing participants. Recording the compound action potential (AP) of the ECoG simultaneously with ABR may be useful when Wave I of the ABR is small or diminished in patients with sensorineural or retrocochlear disorder and minimizes overall test time. In contrast to some previous studies that used the extratympanic electrode both as non-inverting electrode for the ECoG and inverting electrode for ABR, this study maintained separate recording channel montages unique to conventional click-evoked ECoG and ABR recordings. That is, the ABR was recorded using a vertical channel (Cz to ipsilateral earlobe), while the ECoG with custom extratympanic electrode was recorded using a horizontal channel (tympanic membrane to contralateral earlobe). The extratympanic electrode is easy to fabricate in-house, or can be purchased commercially. Maintaining the conventional ABR montage permits continued use of traditional normative data. Broadband clicks at a fixed level of 85 dB nHL were presented with alternating polarity at stimulus rates of 9.3, 11.3, and 15.3/s. Different stimulation rates were explored to identify the most efficient rate without sacrificing time or waveform morphology. Results revealed larger ECoG AP than ABR Wave I, as expected, and no significant difference across stimulation rate and no interaction effect. Extratympanic electrode placement takes little additional clinic time and may improve the neurodiagnostic utility of the ABR. PAGEPress Publications, Pavia, Italy 2015-03-03 /pmc/articles/PMC4627119/ /pubmed/26557358 http://dx.doi.org/10.4081/audiores.2015.105 Text en ©Copyright C. Minaya and S.R. Atcherson http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Article Minaya, Carlos Atcherson, Samuel R. Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title | Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title_full | Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title_fullStr | Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title_full_unstemmed | Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title_short | Simultaneous Extratympanic Electrocochleography and Auditory Brainstem Responses Revisited |
title_sort | simultaneous extratympanic electrocochleography and auditory brainstem responses revisited |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4627119/ https://www.ncbi.nlm.nih.gov/pubmed/26557358 http://dx.doi.org/10.4081/audiores.2015.105 |
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