Morphological evaluation of terminal branches of the facial nerve within the parotid gland in fetus cadavers

Year 2019, Volume: 44 Issue: 2, 509 - 516, 30.06.2019

Canan Ertemoğlu Öksüz , Ahmet Kalaycıoğlu Özlem Uzun , Şahi Nur Kalkışım

https://doi.org/10.17826/cumj.440731

Cited By: 1

Abstract

Purpose: The aim of present study was to describe the branching pattern of the facial nerve according to interconnections between the branches, to examine the number of terminal branches, to determine anatomical variations and to emphasize the importance of these in terms of pediatric parotid surgery.

Materials and Methods: Thirty-two parotid regions from eight female and eight male fetus cadavers (gestational ages between 21.0 and 35.5 weeks according to foot lengths) were dissected. The branching pattern of the facial nerve, terminal branch numbers and interconnections between the branches were examined and described.  In present study, the facial nerve was classified using Davis et al.’ classification. But, we encountered interconnections between facial nerve branches that were not mentioned previously and the branching patterns formed by these interconnections were named as Type x and Type y.

Results: Out of the total 32 cases, 13 (40.63 %) were Type I, 7 (21.88 %) were Type II, 3 (9.38 %) were Type III and 5 (15.63 %) were Type VI. Type IV and Type V were not encountered. Type x were in 2 (6.25 %) cases and Type y were in 2 (6.25 %) cases. The mean total number of nerve terminal branches was 7.90 ± 1.49.

Conclusion: Investigation outcomes presented in this study have defined branching pattern and anatomical variations of the facial nerve branches and can be assist with the protection of the nerve during surgical procedures and prevent surgery-associated damage to the nerve, and thus facial paralysis.

Keywords

Facial nerve, anatomical variation, branching pattern of the facial nerve, cadaver dissection

Fetus kadavralarında parotid bez içerisindeki fasiyal sinirin terminal dallarının morfolojik değerlendirilmesi

Abstract

Amaç:Bu çalışma fasiyal
sinirin dallanma şeklini dalları arasındaki bağlantılara göre tanımlamak, terminal
dal sayısını incelemek, anatomik varyasyonlarını belirlemek ve parotid
cerrahisi açısından önemini vurgulamak için yapılmıştır.

Gereç ve Yöntem:8 kadın ve 8 erkek fetus kadavrasının (ayak
uzunluklarına göre, yaşları 21.0 ile 35.5 gestasyonel hafta arasında) 32
parotid bölgesi diseke edildi. Fasiyal sinirin dallanma şekli, terminal dal
sayısı ve dalları arasındaki bağlantılar incelendi, tanımlandı. Bu çalışmada,
fasiyal sinir Davis ve ark.’nın sınıflandırmasına göre sınıflandırıldı. Fakat,
fasiyal sinirin dalları arasında daha önce bahsedilmeyen bağlantılarla
karşılaşıldı ve bu bağlantıların oluşturduğu dallanma şekilleri Tip x ve Tip y
olarak adlandırıldı.  

Bulgular:Davis ve ark.’nın sınıflandırmasına göre, 32 vakanın 13
(%40.63)’ü Tip I, 7 (%21.88)’si Tip II, 3 (%9.38)’ü Tip III ve 5 (%15.63)’I Tip
VI idi. Tip IV ve Tip V tanımlanmadı. Tip x, 2 (%6.25) vakada ve Tip y de 2
(%6.25) vakada tanımlandı. Fasiyal
sinirin terminal dallarının ortalama sayısı 7.90 ± 1.49
(6-11) idi.

Sonuç:Çalışmadan elde
edilen araştırma sonuçları fasiyal sinirin dallanma şeklini ve anatomik
varyasyonlarını tanımlayarak cerrahi müdahalelerde sinirin korunmasına yardımcı
olabilir, cerrahi ile ilişkili sinir hasarını ve dolayısıyla da fasiyal
paraliziyi önleyebilir.

Keywords

Fasiyal Sinir, anatomik varyasyon, fasiyal sinirin dallanma şekli, kadavra diseksiyonu

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