PDF(Pubmed)
Abstract：
OBJECTIVE: 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.
CONCLUSIONS: We think that revealing the anatomical, structural and numerical variations in the fundus will be useful in explaining the disease-symptom relationship.
METHODS: Level 4.
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.
CONCLUSIONS: We think that revealing the anatomical, structural and numerical variations in the fundus will be useful in explaining the disease-symptom relationship.
METHODS: Level 4.
摘要：
目的：内耳道是连接内耳和后颅窝的骨管。它位于颞骨的岩部。称为眼底的薄网状骨板位于运河的侧端。这项研究评估了眼底形成的结构和数值变化。
方法：用手术显微镜检查54块性别和年龄不详的颞骨。
结果：分析的颞骨右侧为46.2％，左侧为53.7％。只有一个颞骨有两个平行的横冠，而三个有一个前脊，在后面分成两个分支。横向波峰处的孔的数量各不相同，29.6%的人没有，48.1%有一个孔，22.2%有几个孔。在53.7%的颞骨中看到了前脊结构，5%的面管入口略有收缩。在单神经孔的情况下，48.1%有一个，51.8%的人不止一个，包括三个或四个孔的例子。在7％的患者中，在单神经的孔部之间发现了波峰。此外，在25.9%的病例中，囊状神经孔和高纤维孔之间有一个峰，5%有两个囊状神经孔。
结论：我们认为揭示解剖学，眼底的结构和数值变化将有助于解释疾病-症状关系。
方法：第4级。
方法：用手术显微镜检查54块性别和年龄不详的颞骨。
结果：分析的颞骨右侧为46.2％，左侧为53.7％。只有一个颞骨有两个平行的横冠，而三个有一个前脊，在后面分成两个分支。横向波峰处的孔的数量各不相同，29.6%的人没有，48.1%有一个孔，22.2%有几个孔。在53.7%的颞骨中看到了前脊结构，5%的面管入口略有收缩。在单神经孔的情况下，48.1%有一个，51.8%的人不止一个，包括三个或四个孔的例子。在7％的患者中，在单神经的孔部之间发现了波峰。此外，在25.9%的病例中，囊状神经孔和高纤维孔之间有一个峰，5%有两个囊状神经孔。
结论：我们认为揭示解剖学，眼底的结构和数值变化将有助于解释疾病-症状关系。
方法：第4级。
