Fetal development of the tympanic part of the facial canal

Abing, W.; Rauchfuss, A.

doi:10.1007/bf00464645

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…There is a report in which the authors mentioned that the development of the canal was completed by the age of 4 years from an anatomical and radiological standpoint [13]. Another report mentioned that middle ear inflammation in young children could affect the development of the canal [12]. We showed in this study that no significant difference was observed between the incidence of the facial nerve canal dehiscence in temporal bones with chronic otitis media and that in normal controls.…”

Section: Discussionmentioning

confidence: 41%

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Facial nerve canal dehiscence in chronic otitis media without cholesteatoma

Nomiya

Kariya

Nomiya

et al. 2013

Eur Arch Otorhinolaryngol

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The information on incidence of the facial nerve canal dehiscence in chronic otitis media is important for surgeons. The purpose of this study is to disclose the histopathologic findings of facial nerve canal dehiscence in human temporal bones with chronic otitis media. We divided the human temporal bones into two groups (age 4 years, and under 4 years of age). We evaluated the incidence and the area of the facial nerve canal dehiscence in chronic otitis media under light microscopy. Age-matched normal control temporal bones were also examined. In the age group of 4 years, 68.9 % of temporal bones with chronic otitis media and 71.9 % of controls had the facial nerve canal dehiscence. There was no significant difference between them (P = 0.61). The area of the dehiscence in temporal bones with chronic otitis media was not statistically different from controls (P = 0.53). In the age group under 4 years, 88.2 % of temporal bones with chronic otitis media and 76.5 % of controls had the dehiscence. No significant difference was found between them (P = 0.66). The area of the dehiscence in temporal bones with chronic otitis media was not statistically different from controls in the age group under 4 years (P = 0.43). In chronic otitis media, the incidence of facial nerve canal dehiscence was high and was not statistically different from controls. These results suggest that there is no association between chronic otitis media and the presence of facial nerve canal dehiscence.

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Section: Discussionmentioning

confidence: 41%

“…In young children, inflammation of the middle ear cavity can affect the development of the canal since the development of the canal continues after birth and is completed by the age of 4 years [12, 13]. …”

Section: Introductionmentioning

confidence: 99%

Facial nerve canal dehiscence in chronic otitis media without cholesteatoma

Nomiya

Kariya

Nomiya

et al. 2013

Eur Arch Otorhinolaryngol

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“…The facial nerve develops in close association with the developing otic capsule 6,7 . By the 16th week of fetal life, the facial nerve enters the meatal segment closely associated with the superior vestibular nerve and surrounded by cartilage.…”

Section: Literature Reviewmentioning

confidence: 99%

“…As the labyrinth undergoes endochondral ossification, part of the facial canal becomes bone. However, final closure of the nerve in a bony canal depends on the intramembranous ossification of the fibrous connective tissue investing the facial nerve 7 . Closure of the facial canal occurs at about 22 to 25 weeks of gestation, as two ledges of osteoid deposited by osteoblasts with an intervening aplastic zone, until the enclosure is complete.…”

Section: Literature Reviewmentioning

confidence: 99%

Development of the Facial Recess: Implications for Cochlear Implantation

Eby¹

1996

The Laryngoscope

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More attention is being focused on the growth and development of the facial recess because of the use of cochlear implantation in children over 2 years of age and the prospect of using implants in even younger children. The facial recess and the extended facial recess were measured in 123 temporal bones from 73 individuals ranging in age from 8 weeks in utero to 7 years after birth. The goals were to trace the development of the facial recess and to determine whether this area continues to grow into childhood. The facial recess enlarges throughout fetal life with the development of the facial canal and the tympanic annulus. Reichert's cartilage, seen early in utero in the facial recess, gradually resorbs but may persist in the newborn. In full-term infants, the facial recess reaches 3.25 mm at the oval window and 2.62 mm at the round window. The extended facial recess reaches 3.79 mm at the oval window and 3.04 mm at the round window. No statistically significant growth of the facial recess after birth could be demonstrated in this study. The data suggest that the facial recess is probably adult sized at birth and should allow surgical access for cochlear implantation in very young children.

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“…In normal development, the base of the facial canal is the otic capsule itself, and a thin condensation of mesenchyma surrounds the lateral side of the nerve (1). This is the first appearance of the facial canal.…”

mentioning

confidence: 99%