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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| Format: | Article |
| Language: | English |
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MDPI AG
2015-03-01
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| Series: | Audiology Research |
| Subjects: | |
| Online Access: | https://audiologyresearch.org/index.php/audio/article/view/105 |
| _version_ | 1819296723013468160 |
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| author | Carlos Minaya Samuel R. Atcherson |
| author_facet | Carlos Minaya Samuel R. Atcherson |
| author_sort | Carlos Minaya |
| collection | DOAJ |
| 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 inhouse, 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. |
| first_indexed | 2024-12-24T05:02:38Z |
| format | Article |
| id | doaj.art-b9faaa3b8a034f94bb3f18dc52ade95b |
| institution | Directory Open Access Journal |
| issn | 2039-4330 2039-4349 |
| language | English |
| last_indexed | 2024-12-24T05:02:38Z |
| publishDate | 2015-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Audiology Research |
| spelling | doaj.art-b9faaa3b8a034f94bb3f18dc52ade95b2022-12-21T17:13:57ZengMDPI AGAudiology Research2039-43302039-43492015-03-015110.4081/audiores.2015.10574Simultaneous extratympanic electrocochleography and auditory brainstem responses revisitedCarlos Minaya0Samuel R. Atcherson1Department of Audiology and Speech Pathology, University of Arkansas for Medical Sciences and University of Arkansas at Little Rock, ARDepartment of Audiology and Speech Pathology, University of Arkansas for Medical Sciences and University of Arkansas at Little Rock, ARThe 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 inhouse, 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.https://audiologyresearch.org/index.php/audio/article/view/105extratympanicelectrocochleographyauditory brainstem responseelectrodesimultaneous. |
| spellingShingle | Carlos Minaya Samuel R. Atcherson Simultaneous extratympanic electrocochleography and auditory brainstem responses revisited Audiology Research extratympanic electrocochleography auditory brainstem response electrode simultaneous. |
| 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 | extratympanic electrocochleography auditory brainstem response electrode simultaneous. |
| url | https://audiologyresearch.org/index.php/audio/article/view/105 |
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