Yagi N, Nakatani H
Department of Otolaryngology, Faculty of Medicine, Kyoto University, Japan.
Ann Otol Rhinol Laryngol. 1988 Jan-Feb;97(1):87-91. doi: 10.1177/000348948809700115.
The stapedial reflex (SR) can be obtained by the impedance method only when the middle ear is intact. In order to examine the function of the stapedius muscle in diseased ears, the recording of the stapedial electromyogram by an electrocochleographic (ECoG) method was considered. The SR was recorded simultaneously by the impedance method in ten normal subjects for comparison. The outputs of ECoG were averaged by a signal processor up to 200 times under a longer sweep time, and a large biphasic wave with a latency of about 11 ms was obtained on the ECoG records. The amplitude increase of the biphasic wave caused by raising the intensity of the acoustic stimulation paralleled that of the SR. This means that the biphasic wave obtained by ECoG with a latency of about 11 ms originated from the stapedius muscle.
镫骨肌反射（SR）仅当中耳完整时才能通过声阻抗法获得。为了检查患病耳朵中镫骨肌的功能，考虑采用耳蜗电图（ECoG）方法记录镫骨肌电图。通过声阻抗法同时记录了10名正常受试者的SR以作比较。ECoG的输出由信号处理器在较长扫描时间内平均多达200次，在ECoG记录上获得了一个潜伏期约为11毫秒的大双相波。通过提高声刺激强度引起的双相波幅度增加与SR的幅度增加平行。这意味着通过ECoG获得的潜伏期约为11毫秒的双相波起源于镫骨肌。
