上鼓室和中鼓室交界处较窄,此处又有鼓室粘膜皱襞、听骨及鼓膜张肌肌腱存在,故上、中鼓室间仅有狭窄的鼓峡保持气体流通。本文从解剖学角度讨论鼓峡闭锁的机制。鼓峡闭锁可分为水平闭锁与立体闭锁两种。水平闭锁是由于上鼓室负压造成与鼓膜紧张部内陷无关。立体闭锁是由于内陷的鼓膜紧张部本身从下面封闭了鼓峡所造成的,它与渗出性中耳炎有密切关系。作者采用新鲜正常人颞骨标本,以手术显微 Tympanum and the tympanum at the junction of the narrow, there are tympanic mucosal folds, ossicles and tympanic tendon tendon, so the upper and middle tympanic only narrow gorge to maintain gas circulation. This article discusses the mechanism of drum gorge atresia from the perspective of anatomy. Drum Gap lock can be divided into two levels of horizontal and vertical locking. Horizontal blockage is caused by the negative pressure on the tympanic membrane tympanic Department has nothing to do with retraction. Stereotaxy is due to the retraction of the tympanic membrane tension itself is enclosed from below Drum Gap caused it with exudative otitis media are closely related. The authors used fresh normal human temporal bone specimens for microscopic surgery