騒音の内耳核酸に及ぼす影響に関する実験的研究
後編 紫外線顕微分光測光法による研究
1960 年 63 巻 11 号 p. 2289-2297
詳細
1960 年 63 巻 11 号 p. 2289-2297
From the Department of Oto-Rhino-Laryngology, Faculty of Medicine, Hirosaki University (Director: Prof. S. Katagiri) Using. Koana Naora's ultraviolet-microspectrophotometer, the author observed ultraviolet absorption in the nucleus and cytoplasm of the inner-ear cells of guineapigs, which were exposed to the white noise of 110-120phon for 56 hours in a week. The results were as follows:
1) Decrease of RNA in the cytoplasm of the outer hair-cells was most pronounced in the basal turn and on the contrary slight in the apical turn of the cochlea.
2) RNA in the cytoplasm of the inner hair-cells showed slight increase in every turn of the cochlea.
3) RNA in the cells of the stria vascularis diminished remarkably in the basal turn compared with the other turn.
4) In the spiral ganglion cells, decrease of the nucleic acids in the cytoplasm and nucleus was most considerable in the basal and the 2nd turn, especially in the latter. However, the decrease of. the nucleic acids was not so pronounced as seen in Hydens reports.
