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Anatomical Characteristics of Facial Nerve and Cochlea Interaction
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Orthopaedics.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
2017 (English)In: Audiology & neuro-otology, ISSN 1420-3030, E-ISSN 1421-9700, Vol. 22, no 1, 41-49 p.Article in journal (Refereed) Published
Abstract [en]

Objective: The aim was to study the relationship between the labyrinthine portion (LP) of the facial canal and the cochlea in human inner ear molds and temporal bones using micro-CT and 3D rendering. A reduced cochlea-facial distance may spread electric currents from the cochlear implant to the LP and cause facial nerve stimulation. Influencing factors may be the topographic anatomy and otic capsule properties.

Methods: An archival collection of human temporal bones underwent micro-CT and 3D reconstruction. In addition, cochlea-facial distance was assessed in silicone and polyester resin molds, and the association between the LP and upper basal turn of the cochlea was analyzed.

Results: Local thinning of the otic capsule and local anatomy may explain the development of cochlea-facial dehiscence, which was found in 1.4%. A reduced cochlea-facial distance was noted in 1 bone with a superior semicircular canal dehiscence but not in bones with superior semicircular canal "blue line." The otic capsule often impinged upon the LP and caused narrowing.

Conclusion: Micro-CT with 3D rendering offers new possibilities to study the topographic anatomy of the human temporal bone. The varied shape of the cross-section of the LP could often be explained by an "intruding" cochlea.

Place, publisher, year, edition, pages
KARGER , 2017. Vol. 22, no 1, 41-49 p.
Keyword [en]
Human temporal bones, Cochlea, Facial canal, Micro-CT
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-333425DOI: 10.1159/000475876ISI: 000406762600006PubMedID: 28628917OAI: oai:DiVA.org:uu-333425DiVA: diva2:1156511
Available from: 2017-11-13 Created: 2017-11-13 Last updated: 2017-11-13Bibliographically approved

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Schart-Moren, NadineLarsson, SuneRask-Andersen, HelgeLi, Hao

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