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本文描述了识别上鼓室前部面神经管的可靠的骨性手术标志,适用于病变引起中耳解剖模糊时或进行面神经减压术时分辨面神经。这一结构是骨性界标(有时是骨性和膜性的),它形成上鼓室前壁且使其与发育过程中变异而来的上鼓室前部气房分隔开来。它从鼓室盖向上延伸到匙突,向下至鼓膜张肌腱,位于上鼓室内槌骨头的前面。这些特征可以在上半规管水平和面神经膝的颞骨标本横断面上表现出来。界标横跨上鼓室形成连续性屏障,稍下方处则和鼓膜张肌腱相并行,此一水平的界标多为膜性结构。由此界标可以把面神经水平部划分为上鼓室部和上鼓室前部两段。
This article describes the reliable identification of bony surgeries that identify the front facial nerve canal in the upper tympanic cavity and is useful in resolving facial nerves when the lesions cause anatomical obstruction of the middle ear or during facial nerve decompression. This structure is a bony landmark (sometimes bony and membranous) that forms the upper front wall of the tympanic membrane and separates it from the anterior atria of the upper tympanic during its development. It extends up from the tympanic cap to the spondylosis, down to the tympanic tendon, in front of the hammerhead in the upper tympanic cavity. These features can be demonstrated at the level of the semicircular canal and the cross-section of the temporal bone specimen of the facial nerve. Markers across the tympanic to form a continuous barrier, and slightly below the tympanic membrane tendon phase parallel, the level of the landmark mostly membranous structure. This landmark can divide the facial nerve into two parts, the upper tympanic compartment and the upper tympanic compartment.