Steady-state sinusoidal velocity responses of the basilar membrane in guinea pig
Steady-state sinusoidal velocity responses of the basilar membrane in guinea pig
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DOI：
10.1121/1.414732
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发表时间：
1996-03-01
影响因子：
2.4
通讯作者：
Dolan, DF
中科院分区：
文献类型：
--
作者：
Nuttall, AL;Dolan, DF
本报告提供了一个详细的分析，音调诱发的速度反应的基底膜（BM）运动测量的豚鼠耳蜗的基底回。激光多普勒振动计，耦合到一个复合显微镜，测量的速度反射微珠放置到鼓阶表面的BM。镫骨底板的速度响应也被确定，允许BM传递函数的计算。将正常传递函数与耳蜗“不敏感”和死后观察到的传递函数进行比较。该比较导致有效过程对BM传递函数的幅度和相位的贡献的测量。结果发现，在最佳频率下，有源过程贡献了多达65 dB的“增益"和270度的相位滞后。输入/输出速度函数的功能和派生的机械频率调谐曲线在50 μ m/s的标准的其他细节进行了分析。(C)1996年美国声学学会。
This report provides a detailed analysis of tone-evoked velocity responses of basilar membrane (BM) motion measured in the basal turn of the guinea pig cochlea. A laser Doppler vibrometer, coupled to a compound microscope, measured the velocity of reflective microbeads placed onto the scala tympani surface of the BM. The velocity responses of the stapes footplate were also determined, allowing the calculation of a BM transfer function. The normal transfer function is compared to that seen with cochlear ''insensitivity'' and postmortem. This comparison results in measures of the active process contribution to the magnitude and phase of the BM transfer function. It was found that the active process contributed as much as 65 dB of ''gain'' and 270 degrees of phase lag at the best frequency. Other details about features of input/output velocity functions and the derived mechanical frequency-tuning curve at a criterion of 50 mu m/s are analyzed. (C) 1996 Acoustical Society of America.