Gyo K, Aritomo H, Goode R L
Acta Otolaryngol. 1987 Jan-Feb;103(1-2):87-95. doi: 10.3109/00016488709134702.
Vibration modes of the ossicles and the lever function were studied in human cadaver temporal bones with an intact cochlea. After placing tiny steel spheres on the ossicles, ossicular vibration to a sound stimulus was measured by observing the displacements of the spheres under a microscope with strobe illumination by means of a video measuring system. The lever ratio varied from 1.9 at 0.6 kHz (minimum) to a peak of 6 near 2 kHz. This relatively high lever ratio at higher frequencies was considered to be caused by a shift of the malleus-incus rotation axis secondary to the loading of the cochlear fluid on the ossicular system. Dependence of the lever ratio on frequency indicated that the rotation axis of the ossicles was not fixed, but variable according to frequency due to a relative increase in the translational movements of the rotation axis of the malleus and incus with frequency.
在具有完整耳蜗的人类尸体颞骨中研究了听小骨的振动模式和杠杆功能。在听小骨上放置微小钢球后，通过视频测量系统，利用频闪照明在显微镜下观察钢球的位移，测量听小骨对声音刺激的振动。杠杆比从0.6千赫时的1.9（最小值）变化到接近2千赫时的峰值6。较高频率下这种相对较高的杠杆比被认为是由于耳蜗内淋巴液加载到听骨系统上，导致锤骨 - 砧骨旋转轴发生位移所致。杠杆比对频率的依赖性表明，听小骨的旋转轴不是固定的，而是由于锤骨和砧骨旋转轴的平移运动随频率相对增加，导致其随频率变化。
