Location of the stapedius muscle with reference to the facial nerve in patients with unilateral congenital aural atresia: implication for active middle ear implants surgery

Ryoukichi Ikeda, Hiroshi Hidaka, Takaki Murata, Tetsuaki Kawase, Yukio Katori, Toshimitsu Kobayashi

Research output: Contribution to journalArticle

Abstract

Background: Detailed investigations of the stapedial muscle (SM) in congenital aural atresia (CAA) patients have yet to be adequately conducted. Objectives: To assess image variations in the mastoid segment of the facial nerve (FN) and SM in CAA. Materials and methods: A total of nine patients comprising of 9 ears with unilateral CAA were studied. The courses of the FN and SM were evaluated from the basic point to 1 mm intervals between the mastoid portion of FN, and measured from the mean X and Y values in each group. Results: The atresia side of FN among the Y values showed significant differences compared to the contralateral side. In terms of the SM, there were no significant differences in both the X and Y values. The stapedial muscle of the CAA patients was located medially to the FN. Conversely, the distance from the PSC to the FN revealed no significant differences with regard to the X and Y values for each group. Conclusion: The current observations revealed that the SM is located more posterior to the FN in CAA patients, and this is mainly attributed to the laterally and anteriorly displaced FN.

Original languageEnglish
Pages (from-to)445-449
Number of pages5
JournalActa Oto-Laryngologica
Volume140
Issue number6
DOIs
Publication statusPublished - 2020 Jun 2

Keywords

  • Aural atresia
  • active middle ear implant
  • computed tomography
  • facial nerve
  • stapedial muscle
  • unilateral

ASJC Scopus subject areas

  • Otorhinolaryngology

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