温度性前庭刺激による指尖容積脈波の変化 : 第1報正常者における反応様式

概要

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On 40 normal subjects aged 10-19, 20-29, 30-49, and over 50 years, 10 subjects in each age group, caloric irrigation in external auditory canal was conducted. Water temperature was 30°C and 4°C. During the test, reflection photoelectric plethysmograph was attached on the tip of each index finger of both hands and the changes of amplitude of plethysmogram were measured. On 8 subjects, the test was repeated 4 times under the same condition, and the reappearance of this reaction was examined. Results were as follows in : 1. There was a significant difference between the reaction in those under 50 years of age and those over in the rate of diminution of waves on the maximum reaction point. 2. The rate of diminution of waves on the maximum reaction point was considerably consistent in the same subjects, although there were individual differences. 3. The author presumed that the reaction of diminution of waves in this test was mainly due to vestibular stimulation induced by caloric irrigation, although there might be other non-vestibular reactions.
社団法人日本耳鼻咽喉科学会の論文