Cochlear nerve visualization in Normal anatomy and inner ear malformations
Abstract Objectives This study aimed to qualitatively evaluate the variations in nerve bundles between patients with normal anatomy and those with inner‐ear anomalies. Methods Magnetic resonance imaging (MRI) scans of the temporal bones of candidates for cochlear implants (CIs) enrolled at a tertiar...
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| Format: | Article |
| Language: | English |
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Wiley
2024-12-01
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| Series: | Laryngoscope Investigative Otolaryngology |
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| Online Access: | https://doi.org/10.1002/lio2.70023 |
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| author | Majed Assiri Tawfiq Khurayzi Fida Almuhawas Kurt Schlemmer Abdulrahman Hagr Anandhan Dhanasingh |
| author_facet | Majed Assiri Tawfiq Khurayzi Fida Almuhawas Kurt Schlemmer Abdulrahman Hagr Anandhan Dhanasingh |
| author_sort | Majed Assiri |
| collection | DOAJ |
| description | Abstract Objectives This study aimed to qualitatively evaluate the variations in nerve bundles between patients with normal anatomy and those with inner‐ear anomalies. Methods Magnetic resonance imaging (MRI) scans of the temporal bones of candidates for cochlear implants (CIs) enrolled at a tertiary center were retrospectively reviewed from the clinical database. The 3.0‐Tesla MRI scans were analyzed using a three‐dimensional slicer to visualize the nerve bundles in the internal auditory canal. Results A total of 49 ears were analyzed. Twenty ears exhibited normal inner ear anatomy, whereas 29 ears had various inner‐ear malformations. The cochlear nerve (CN) was visible on all 20 scans with normal inner‐ear anatomy. In addition, the CN was visualized in 18 scans with inner ear malformations. Furthermore, the CN was identified in six of the eight scans with IP type I, whereas in two scans, the CN and vestibular nerve were unclear. Three scans with a common cavity showed only two nerve bundles. Conclusion The findings of this study show that the CN can be visualized in most inner‐ear anatomical types. Even in severely malformed inner ears, the common nerve bundle that represents the cochlear and vestibular nerves can be visualized. The MRI is highly recommended for CN assessment before CI surgery. Level of Evidence Level IV. |
| format | Article |
| id | doaj-art-d7c475e44e0e40a096b4c39e18bde707 |
| institution | DOAJ |
| issn | 2378-8038 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Laryngoscope Investigative Otolaryngology |
| spelling | doaj-art-d7c475e44e0e40a096b4c39e18bde7072025-08-20T02:39:59ZengWileyLaryngoscope Investigative Otolaryngology2378-80382024-12-0196n/an/a10.1002/lio2.70023Cochlear nerve visualization in Normal anatomy and inner ear malformationsMajed Assiri0Tawfiq Khurayzi1Fida Almuhawas2Kurt Schlemmer3Abdulrahman Hagr4Anandhan Dhanasingh5Abha Pediatric Hospital, Cochlear Implant Centre Ministry of Health Abha Saudi ArabiaKing Fahad Central Hospital Jizan Saudi ArabiaKing Abdullah Ear Specialist Centre, King Saud University Medical City King Saud University Riyadh Saudi ArabiaDepartment of Speech‐Language Pathology and Audiology University of Pretoria Pretoria South AfricaKing Abdullah Ear Specialist Centre, King Saud University Medical City King Saud University Riyadh Saudi ArabiaMED‐EL Medical Electronics GmbH Innsbruck AustriaAbstract Objectives This study aimed to qualitatively evaluate the variations in nerve bundles between patients with normal anatomy and those with inner‐ear anomalies. Methods Magnetic resonance imaging (MRI) scans of the temporal bones of candidates for cochlear implants (CIs) enrolled at a tertiary center were retrospectively reviewed from the clinical database. The 3.0‐Tesla MRI scans were analyzed using a three‐dimensional slicer to visualize the nerve bundles in the internal auditory canal. Results A total of 49 ears were analyzed. Twenty ears exhibited normal inner ear anatomy, whereas 29 ears had various inner‐ear malformations. The cochlear nerve (CN) was visible on all 20 scans with normal inner‐ear anatomy. In addition, the CN was visualized in 18 scans with inner ear malformations. Furthermore, the CN was identified in six of the eight scans with IP type I, whereas in two scans, the CN and vestibular nerve were unclear. Three scans with a common cavity showed only two nerve bundles. Conclusion The findings of this study show that the CN can be visualized in most inner‐ear anatomical types. Even in severely malformed inner ears, the common nerve bundle that represents the cochlear and vestibular nerves can be visualized. The MRI is highly recommended for CN assessment before CI surgery. Level of Evidence Level IV.https://doi.org/10.1002/lio2.70023cochleacochlear implantcochlear nerveinner earMRI |
| spellingShingle | Majed Assiri Tawfiq Khurayzi Fida Almuhawas Kurt Schlemmer Abdulrahman Hagr Anandhan Dhanasingh Cochlear nerve visualization in Normal anatomy and inner ear malformations Laryngoscope Investigative Otolaryngology cochlea cochlear implant cochlear nerve inner ear MRI |
| title | Cochlear nerve visualization in Normal anatomy and inner ear malformations |
| title_full | Cochlear nerve visualization in Normal anatomy and inner ear malformations |
| title_fullStr | Cochlear nerve visualization in Normal anatomy and inner ear malformations |
| title_full_unstemmed | Cochlear nerve visualization in Normal anatomy and inner ear malformations |
| title_short | Cochlear nerve visualization in Normal anatomy and inner ear malformations |
| title_sort | cochlear nerve visualization in normal anatomy and inner ear malformations |
| topic | cochlea cochlear implant cochlear nerve inner ear MRI |
| url | https://doi.org/10.1002/lio2.70023 |
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