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Kurasawa M, Nakamura T, Ganaha A, Nakashima T, Tono T. Electrical promontory stimulation test using a portable peripheral nerve stimulator with an ear canal electrode. Auris Nasus Larynx 2024; 51:76-81. [PMID: 37193621 DOI: 10.1016/j.anl.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/21/2023] [Accepted: 05/08/2023] [Indexed: 05/18/2023]
Abstract
OBJECTIVE An intact cochlear nerve is necessary for successful cochlear implantation (CI). Although the promontory stimulation test (PST) using a promontory stimulator (PS) and a transtympanic needle electrode is invasive, it is still commonly used to verify cochlear nerve function. PSs are currently unavailable because they are no longer manufactured; however, considering that PST continues to be beneficial in certain situations, alternative equipment is needed. The PNS-7000® (PNS) was developed as a neurologic instrument for stimulating the peripheral nerves. This study investigated the usefulness of the ear canal stimulation test (ECST) using PNS with a silver ball ear canal electrode, which is a new noninvasive alternative technique to the PST. METHODS ECST was performed from November 2013 to December 2018 using PS and PNS for patients with severe to profound sensorineural hearing loss. The electrical threshold, most comfortable loudness level, uncomfortable loudness level, dynamic range, and gap detection were measured in the ECST. The results of these measured PNS items were compared with PS. RESULTS ECST was performed in 61 ears of 35 patients (age, 59.9 ± 20.1 years) using PS and PNS. The sound sensation was elicited in 51 (83.6%) and 52 (85.2%) ears with PS and PNS, respectively. All items excluding GAP were measured in 46 (75%) and 43 (70%) ears at 50 and 100 Hz, respectively. GAP was measured in 33 ears by the ascending and descending methods using PS and PNS. Spearman's rank-order correlation coefficient revealed a significant positive linear correlation between the PS and PNS results in all measurements. No significant difference was found between the PS and PNS thresholds in all measured items. CONCLUSIONS PNS is a useful instrument for performing ECST as a new alternative to PS. ECST using a silver ball electrode is a less invasive and easier test than PST.
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Affiliation(s)
- Michiko Kurasawa
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Takeshi Nakamura
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Akira Ganaha
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan; Department of Otorhinolaryngology, Head and Neck Surgery, International University of Health and Welfare, Narita Hospital, Narita, Japan.
| | | | - Tetsuya Tono
- Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan; Department of Otolaryngology, International University of Health and Welfare, Tochigi, Japan
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Chen L, Zhang JG, Zhu HY, Hou XY, Tang ZQ, Sun JW, Sun JQ, Guo XT. Electrically Evoked Auditory Brainstem Responses in Children Fitted with Hearing Aids Prior to Cochlear Implantation. Trends Hear 2023; 27:23312165221148846. [PMID: 36632674 PMCID: PMC9982387 DOI: 10.1177/23312165221148846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
This study investigates the effect of hearing aid use on the peripheral auditory pathways in children with sensorineural hearing loss prior to cochlear implantation, as revealed by the electrically evoked auditory brainstem response (EABR). Forty children with hearing aids were recruited. Half of them had normal inner ear structures and the other half had inner ear malformations (IEMs). The EABR was evoked by electrically stimulating the round window niche (RWN) and round window membrane (RWM) during the cochlear implantation operation. The onset age of hearing aid use was significantly correlated with the peak latencies, but not amplitudes, of the wave III (eIII) and wave V (eV). Higher EABR thresholds were found for RWN stimulation than for RWM stimulation and in the children with IEMs than in those without IEMs. Our study provides neurophysiological evidence that earlier use of hearing aids may ameliorate physiological functions of the peripheral auditory pathway in children with and without IEMs. The EABR evoked by the electrical stimulation at RWM is more sensitive compared with that at RWN for evaluating functions of the auditory conduction pathway.
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Affiliation(s)
- Li Chen
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China,Wannan Medical College, Anhui Provincial Hospital, Hefei, Anhui,
230001, China
| | - Jun-Ge Zhang
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China,Wannan Medical College, Anhui Provincial Hospital, Hefei, Anhui,
230001, China
| | - Han-Yu Zhu
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China
| | - Xiao-Yan Hou
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China
| | - Zheng-Quan Tang
- School of Life Sciences, Anhui University, Hefei, Anhui, 230601, China
| | - Jing-Wu Sun
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China
| | - Jia-Qiang Sun
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China,Jia-Qiang Sun, Department of
Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of USTC,
Division of Life Sciences and Medicine, University of Science and Technology of
China, Hefei, Anhui 230001, China.
| | - Xiao-Tao Guo
- Department of Otolaryngology-Head and Neck Surgery, The First
Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of
Science and Technology of China, Hefei, Anhui, 230001, China,CAS Key Laboratory of Brain Function and Diseases, School of Life
Sciences, University of Science and Technology of China, Hefei, Anhui, 230027,
China,Xiao-Tao Guo, Department of
Otolaryngology-Head and Neck Surgery, The First Affiliated Hospital of USTC,
Division of Life Sciences and Medicine, University of Science and Technology of
China, Hefei, Anhui 230001, China.
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Occhigrossi C, Brosch M, Giommetti G, Panichi R, Ricci G, Ferraresi A, Roscini M, Pettorossi VE, Faralli M. Auditory perception is influenced by the orientation of the trunk relative to a sound source. Exp Brain Res 2021; 239:1223-1234. [PMID: 33587165 DOI: 10.1007/s00221-021-06047-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 01/18/2021] [Indexed: 12/15/2022]
Abstract
The study investigated how hearing depends on the whole body, head and trunk orientation relative to a sound source. In normal hearing humans we examined auditory thresholds and their ability to recognize logatomes (bi-syllabic non-sense words) at different whole body, head and trunk rotation relative to a sound source. We found that auditory threshold was increased and logatome recognition was impaired when the body or the trunk were rotated 40° away from a sound source compared to when the body or the trunk was oriented towards the sound source. Conversely, no effects were seen when only the head was rotated. Further, an increase of thresholds and impairment of logatome recognition were also observed after unilateral vibration of dorsal neck muscles that induces, per se, long-lasting illusory trunk displacement relative to the head. Thus, our findings support the idea that processing of acoustic signals depends on where a sound is located within a reference system defined by the subject's trunk coordinates.
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Affiliation(s)
- Chiara Occhigrossi
- Department of Experimental Medicine, Human Physiology Section, Università degli Studi di Perugia, Perugia, Italy
| | - Michael Brosch
- Research Group Comparative Neuroscience, Leibniz Institute for Neurobiology, Brenneckestraße 6, 39118, Magdeburg, Germany
- Center for Behavioral Brain Sciences, Otto-Von-Guericke-University, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Giorgia Giommetti
- Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, Perugia, Italy
| | - Roberto Panichi
- Department of Experimental Medicine, Human Physiology Section, Università degli Studi di Perugia, Perugia, Italy
| | - Giampietro Ricci
- Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, Perugia, Italy
| | - Aldo Ferraresi
- Department of Experimental Medicine, Human Physiology Section, Università degli Studi di Perugia, Perugia, Italy
| | - Mauro Roscini
- Department of Experimental Medicine, Human Physiology Section, Università degli Studi di Perugia, Perugia, Italy
| | - Vito Enrico Pettorossi
- Department of Experimental Medicine, Human Physiology Section, Università degli Studi di Perugia, Perugia, Italy.
| | - Mario Faralli
- Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, Perugia, Italy
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Fernandez NM, Vernetta CDP, Garrido LC, Gomez MD, Perez CM. Electrically Evoked Auditory Brainstem Response over Round Window by Bipolar Stimulation. J Int Adv Otol 2018; 14:370-374. [PMID: 30325333 DOI: 10.5152/iao.2018.5046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES Auditory brainstem potentials can be elicited by electrical stimulation of the round window (RW). In this technique, extracochlear stimulation is objectively used in the selection of cochlear implant (CI) candidates to avoid cochlear damage. However, until now, its use is limited due to the large artifacts generated by electrical stimulation. Our objective was to obtain reliable and reproducible electrically evoked auditory brainstem responses (eEABRs) using a new method of stimulation. MATERIALS AND METHODS This was a prospective study including subjects who underwent electrical stimulation on RW during CI surgery between 2013 and 2016. A "Stimulator Box," which produces electric stimuli identical to those provided by a CI, and an evoked potential recording equipment were used. The results obtained with monopolar and bipolar electrodes were compared. RESULTS RW eEABR recordings of 49 subjects (mean age, 34 years) were characterized by their stability and by having wave V between 3 and 5.5 ms. A higher percentage of responses were obtained on increasing the phase duration instead of the pulse amplitude. A significantly greater percentage of positive responses were obtained using bipolar stimulation than using monopolar stimulation (p<0.001). CONCLUSION Using extracochlear electrical stimulation technique, described herein, and bipolar electrical stimulation probe allows for reliable and reproducible eEABR recordings in CI candidates.
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