前庭核に対する電気刺激的研究 前庭核刺激と眼振について
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概要
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To clarify the function of the vestibular nuclei an experimental study was made. Nystagmic responses of the cats were observed when the unilateral vestibular nuclei were stimulated electrically.And then the point having responded to electrical stimulation was coagulated. Spontaneous and positioning nystagmus was observed. After the experiment, the animal was killed and its brain was removed in order to examine the coagulated point histologically.The following results were obtained:1) Relation between electrical stimulation to the vestibular nuclei and nystagmic responses:When an optional point of the vestibular nucleus out of four vestibular nuclei (nucleus medialis, nucleus dorsalis, nucleus spinalis, nucleus lateralis.) was electrically stimulated, a type of nystagmic response was observed. On the other hand, when a certain point of other vestibular nucleus was electrically stimulated, the same type of nystagmic response was noticed. For example, horizontal nystagmus was caused not only by stimulation to the nucleus dorsalis, but also by stimulation to the nucleus lateralis.2) Positioning nystagmus:Positioning nystagmus had latency period of 1 to 2sec., and continued a few seconds, and then disappeared.Nystagmus caused by electrical stimulation had _??_ tendency to be influenced by head positioning. Moreover, horizontal nystagmus was much influenced when the head was suddenly turned to the right side or left.On the other hand, vertical nystagmus was also done when the head was turned around the sagittal plane.
- 社団法人 日本耳鼻咽喉科学会の論文