鸡内耳盖膜的超微结构观察

为了解鸟纲内耳盖膜的超微结构及其与毛细胞、支持细胞的关系，应用扫描电镜和透射电镜对鸡内耳盖膜的超微结构进行观察。发现：扫描电镜下盖膜横断面呈三角形，内有许多空洞，内淋巴面呈网状；透射电镜下见盖膜由微丝及肢状基质构成，听毛细胞的最高排静纤毛及动纤毛插入盖腹中，支持细胞的微绒毛通过絮状细丝与盖膜呈锚状连接。这种连接既有弹性又十分牢固，可在一定范围内限制盖膜运动。由此推测鸟纲内耳与哺乳纲内耳在感受声刺激的方式上有所不同。

Ultrastructure of the tectorial membrane in chick inner ear

In order to understand the ultrastructure of the tectorial membrane (TM)in avian inner ear and the relations between TM and hair cells and supporting cells,scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to observe the ultrastructure of TM in chick inner ear. The results were that:when viewed under SEM,TM,which possessed a lot of holes inside,was triangular in shape in cross-section and the surface of TM presented fibrous net ;when viewed under TEM,TM consisted of fine fibrils and gelatinous substance,only the tallest row of stereocilia and the kinocilium in each hair cell were inserted to TM. The microvilli of supporting cells were anchored to TM by cotton-like fibrous webs. This junction had both elastic and firm,to a certian extent, this kind of junction restricted the movement of TM. According to these structures,there should be different patterns of response to sound stimuli between avian cochlea and mamalian cochlea.