Kartush J M, Kemink J L, Graham M D
Ann Otol Rhinol Laryngol. 1985 Jan-Feb;94(1 Pt 1):25-8. doi: 10.1177/000348948509400106.
The superior semicircular canal (SSC) is an important landmark in the middle cranial fossa approach to the temporal bone. This landmark is frequently located by its topographic association to the arcuate eminence. An anatomic study is reported which examines the relationship of the arcuate eminence to the SSC. Techniques for orientation to the internal auditory canal by the middle cranial fossa approach are reviewed and a technique for localizing the SSC when no arcuate eminence is discernible is presented. 1) In 15% of temporal bone specimens, no arcuate eminence was discernible. 2) Of those specimens with an arcuate eminence, 50% demonstrated that the arcuate eminence was rotated posteriorly from the SSC. 3) Despite displacement of the arcuate eminence, the SSC tended to remain perpendicular to the petrous ridge and 60 degrees from the internal auditory canal. 4) Because of their variable relationship, the arcuate eminence should not be used as a substitute for the SSC in the topographic orientation to the internal auditory canal. 5) A technique for locating the SSC when the arcuate eminence is indiscernible is presented.
上半规管（SSC）是颞骨中颅窝入路的重要标志。该标志通常通过其与弓状隆起的地形关系来定位。本文报道了一项解剖学研究，该研究探讨了弓状隆起与SSC的关系。回顾了通过中颅窝入路定位内耳道的技术，并提出了一种在无法辨别弓状隆起时定位SSC的技术。1）在15%的颞骨标本中，无法辨别出弓状隆起。2）在那些有弓状隆起的标本中，50%显示弓状隆起从SSC向后旋转。3）尽管弓状隆起发生了移位，但SSC往往仍与岩嵴垂直，且与内耳道呈60度角。4）由于它们之间的关系多变，在对内耳道进行地形定位时，不应将弓状隆起用作SSC的替代标志。5）提出了一种在无法辨别弓状隆起时定位SSC的技术。
