MIDDLE-EAR CHARACTERISTICS OF ANESTHETIZED CATS
MIDDLE-EAR CHARACTERISTICS OF ANESTHETIZED CATS
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DOI：
10.1121/1.1910465
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发表时间：
1967-01-01
影响因子：
2.4
通讯作者：
PEAKE, WT
中科院分区：
文献类型：
--
作者：
GUINAN, JJ;PEAKE, WT
用频闪照明目测听骨运动。音调刺激范围从30到10000赫兹。在130 dB SPL（声压级）以内，镫骨以活塞式运动为主，其位移幅值与声压呈线性相关。在3000赫兹以下的频率下，听小骨作为一个刚体运动；在较高频率下，镫骨和砧骨的移位落后于锤骨的移位，这表明砧骨-锤骨关节屈曲。根据已知声压下镫骨位移的测量，我们计算了鼓室打开时中耳的传递特性。关闭鼓室对传递特性的影响是通过测量确定的，其中从圆窗记录的电响应被用作中耳输出的指标。通过结合这些数据，我们获得了鼓室完整的中耳转移特性。本文试图比较猫和人的中耳特征。
Ossicular motion was measured visually with stroboscopic illumination. Tonal stimulation ranged from 30 to 10000 Hz. Up to 130 dB SPL (sound-pressure level), the motion of the stapes is predominantly piston-like, and its displacement amplitude is linearly related to sound pressure. At frequencies under 3000 Hz, the ossicles move as one rigid body; at higher frequencies, the stapes and incus displacements lag behind the malleus displacement, which suggests that the incudo-malleolar joint flexes. From measurements of stapes displacement at known sound pressures, we calculate a transfer characteristic for the middle ear with the tympanic cavities open. The effects of closing the tympanic cavities on the transfer characteristic were determined from measurements in which the electric response recorded from the round window was used as an indicator of middle-ear output. By combining these data, we obtain a transfer characteristic for the middle ear with the tympanic cavities intact. An attempt is made to compare middle-ear characteristics of cat and man.