The variations of osseous structure of the internal acoustic canal: an anatomical study.
Braz J Otorhinolaryngol
; 90(3): 101414, 2024.
Article
em En
| MEDLINE
| ID: mdl-38492307
ABSTRACT
OBJECTIVES:
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. LEVEL OF EVIDENCE Level 4.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osso Temporal
Limite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
Braz J Otorhinolaryngol
Assunto da revista:
OTORRINOLARINGOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
Brasil