Basilar membrane mechanics at the base of the chinchilla cochlea. II. Responses to low-frequency tones and relationship to microphonics and spike initiation in the VIII nerve.
Basilar membrane mechanics at the base of the chinchilla cochlea. II. Responses to low-frequency tones and relationship to microphonics and spike initiation in the VIII nerve.
复制标题
龙猫耳蜗底部的基底膜力学。
DOI：
10.1121/1.394390
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
Rich,NC
中科院分区：
文献类型：
--
作者：
Ruggero,MA;Robles,L;Rich,NC
低频刺激（40- 1000 Hz的音调）已被用来关联的运动的8- 9 kHz的地方的灰鼠基底膜与耳蜗微音记录在圆窗和听觉神经纤维的反应与适当的特征频率。在最低的刺激频率下，基底膜朝向鼓阶的最大位移与鼓膜处的最大稀疏和圆窗处的最大负性几乎同步发生;在较高的频率下，机械和颤噪响应阶段逐渐滞后稀疏，在1000 Hz时达到-240度。在大多数频率（40-1000 Hz），近阈值神经反应，一旦校正神经旅行时间和突触延迟，有点导致（约40度）最大鼓阶位移和最大负的圆窗微音。灵敏度随频率的变化与基底膜位移和颤噪响应相似：
Low-frequency stimuli (40-to 1000-Hz tones) have been used to correlate the motion of the 8-to 9-kHz place of the chinchilla basilar membrane with the cochlear microphonics recorded at the round window and with the responses of auditory nerve fibers with appropriate characteristic frequency. At the lowest stimulus frequencies, maximum displacement of the basilar membrane toward scala tympani occurs in near synchrony with maximum rarefaction at the eardrum and maximum negativity at the round window; at higher frequencies, the mechanical and microphonic response phases progressively lag rarefaction, reaching — 240 deg at 1000 Hz. At most frequencies (40–1000 Hz) near-threshold neural responses, once corrected for neural travel-time and synaptic delays, somewhat lead (by some 40 deg) maximal scala tympani displacement and maximal negativity of the round window microphonics. The variation of sensitivity with frequency is similar for basilar membrane displacement and microphonic responses: