頸部交感神経節剔出の内耳に及ぼす影響に関する実験的研究
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概要
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Labyrinth symptoms of rabbit were observed for a long period of time after the removal of the superior cervical ganglion or the stellate ganglion in one side or in both sides in one stage or two stages. The results obteined were as follows: 1) Spontaneous nystagmus appeared in half of the rabbits immediately after the ganglionectomy, it directed mostly toward the operated side. Those phenomena were observed after the superior cervical ganglionectomy as well as the stellate ganglionectomy. 2) Incidence of postrotatory nystagmus was generally decreased after the operation, however in the majority of cases it gradually returned to preoperative condition. In few cases it increased temporarily. 3) Positional nystagmus appeared in two third of the rabbits. howerer, in general, disappeared within two or three weeks after the operation. Occasionally it continued for two months after the operation. 4) Otolith-Reflex slightly decreased after the operation. Second Report: Histopathological Observation The author made histological examination of the internal ear of rabbits in a long period of time after the removal of the superior cervical ganglion or stellate ganglion in one side or in both sides. The results obteined were as follow 1) In a short time after the operation dilatation of blood vessels of the internal ear, edema- tous swelling of organ, and hypertonia labyrinthi in vestibule were seen, particularly vascular stria changes most significantly appeared. 2) Those histological changes were present in contralateral side of the ear as well as in the operated side. 3) Those histological changes were present in the cases with cervical superior ganglionectomy as well as stellate ganglionectomy, however more severe changes were seen in cases with the removal of both ganglia in one stage. 4) Those initial changes disappeared gradually however the histological changes in the blood vessels of the ear labyrinth remained. To the given internal and external stimuli, the ear lalyr- inth in those condition reacted stronger than those in normal condition.