Sarı, ElifNteli Chatzioglou, GkionoulTemirbekov, DastanAliyeva, AynurÖztürk, AdnanGürses, İlke Ali2024-03-182024-03-182024Sarı, E., Nteli Chatzioglou, G., Temirbekov, D., Aliyeva, A., Öztürk, A., & Gürses, İ. A. (2024). The variations of osseous structure of the internal acoustic canal: an anatomical study. Brazilian Journal of Otorhinolaryngology, 90(3), pp. 1-5. https://doi.org/10.1016/j.bjorl.2024.1014141808-86941808-8686https://doi.org/10.1016/j.bjorl.2024.101414https://hdl.handle.net/20.500.13055/669Objectives: The internal acoustic meatus is an osseous canal that connects the inner ear to the posterior cranial fossa. It is located in the petrous portion of the temporal bone. A thin cribriform osseous plate known as the fundus is situated at the lateral end of the canal. This study assesses the structural and numerical variations of the fundus formations. Methods: Fifty-four temporal bones of unknown gender and age were examined with the surgical microscope. Results: The temporal bones analyzed were 46.2% right-sided and 53.7% left-sided. Only one temporal bone had two parallel transverse crests, while three had a single anterior crest that split into two branches posteriorly. The number of foramina at the transverse crest varied, with 29.6% having none, 48.1% having a single foramen, and 22.2% having several foramina. An anterior crest structure was seen in 53.7% of the temporal bones, with 5% having a slightly constricted entry to the facial canal. In cases with a single nerve foramen, 48.1% had one, while 51.8% had more than one, including examples with three or four foramina. A crest was found between the foramina of the single nerve in 7% of patients. Furthermore, a crest between the saccular nerve foramen and the high fiber foramina was seen in 25.9% of cases, and 5% had two saccular nerve foramina. Conclusion: We think that revealing the anatomical, structural and numerical variations in the fundus will be useful in explaining the disease-symptom relationship.eninfo:eu-repo/semantics/openAccessFundus of Internal Acoustic CanalInternal Acoustic MeatusPetrous PartTemporal Bone AnatomyVariations of IACArticle10.1016/j.bjorl.2024.10141490315Q2WOS:0012222814000012-s2.0-85187656952PMID: 38492307Q2