豚鼠耳蜗Corti器外隧道的结构

Structural Characteristic of the Outer Tunnel of Corti's Organ in the Guinea Pig Cochlea

目的观察豚鼠耳蜗Corti器外隧道的解剖特征。方法健康杂色豚鼠11只,共22耳,借助火棉胶切片(5只10耳)和扫描电镜(6只12耳)观察和分析豚鼠耳蜗Corti器外隧道的解剖。结果豚鼠耳蜗Corti器外隧道的内侧壁在耳蜗基底回和第一回由第三排外毛细胞和Deiter细胞的指状突起构成,外侧壁和顶壁由Hensen细胞构成。自耳蜗基底回逐渐向顶回,Deiter细胞的指状突起逐渐移向外侧,形成外隧道的外侧壁和顶壁。外隧道的内侧壁由第三排外毛细胞构成,Deiter细胞指突移向Hensen细胞构成外隧道的外侧壁和顶壁,外隧道腔隙逐渐缩小。第三、四回的外隧道完全被Deiter细胞所充填,Deiter细胞指突和Hensen细胞密切接触。结论豚鼠耳蜗Corti器外隧道的这种结构特征在研究Corti器的微细结构方面增加了新的认识。

Objective To understand the structural characteristics and significance of the outer tunnel of corti＇s organ. Methods The structural characteristics of the outer tunnel were observed and analyzed with celloidin section and scanning electron microscope （SEM）. Results The inner wall of outer tunnel consisted of the third row of outer hair cells （OHC） and the stalk of Deiter^s cells in the basal and the first turn. Hensen^s cells made up the outer wall of the outer tunnel. The stalks of Deiter＇s cells gradually moved to outer side to constitute the outer and top walls of outer tunnel from the basal turn to the top turn. The inner wall of outer tunnel consisted of the third OHC. The stalks of Deiter＇s cells moved to Hensen＇s cells to make the outer wall of the outer tunnel. The space of outer tunnel was gradually decreased. The outer tunnel was full of Deiter^s cells in the third and fourth turn. The stalks of Deiter＇s cells tightly contacted with the Hensen＇s cells. Conclusion The structural characteristics of the outer tunnel play an important role in maintaining the stability of Corti＇s organ.