Physical Property of the cupula as a mechanoreceptor

利用牛蛙迷宫对半规管顶端的物理性质进行了研究。整块切除膜迷路，在小腿公社处开一个小孔。印度墨水被小心地通过这个孔注入，以染色后根管杯状表面。用细针压迫部分根管，测量顶盖移位量。顶盖作为横隔膜运动，凹陷高度为20M m，作为旋转门运动，FJ为40。采用离体半规管一端缝合的方法进行根管封堵效果的研究。根管封堵术可引起较大的坐骨神经反应，提示内淋巴容量的改变明显增强。用印度墨水在壶腹周围注入墨水，研究壶盖和壶腹壁之间的附着。随着内淋巴体积的剧烈移动，墨汁穿过杯状表面，表明杯状和壶腹壁之间的附着相当弱。当给予过多的内淋巴刺激时，这种松散的附着物可能有助于防止顶盖脱位。

Physical property of the semicircular canal cupula was studied using bull frog's labyrinth. The membranous labyrinth was en bloc removed and a smallhole was made at the crus commune. India ink was carefully injected through this hole in order to stain the posterior canal cupula surface. A partof the canal was depressed using fine needle and the amount the cupula shift was measured. The cupula moved as a diaphragm with depression of20 M m and as a swing door with 40 fj. m. The effect of canal plugging was studied using isolated semicircular canal with one canal end sutured. Canal plugging resulted in greater ampujlary nerve response, indicating the endolymphatic volume change was enhanced b;y plugging. The attachment between the cupula and the ampullary wall was studied usingIndia ink injected around the cupula. With intense endolymphatic volume shift, the ink passed through the cupula surface, indicating rather weak attachment between the cupula and the ampullary wall. This loose attachment probably contributes to prevention of cupula dislocation when excessive endolymphatic stimulus is given.