Radionova E A
Laboratory of Hearing Physiology, I.P. Pavlov Institute of Physiology, Leningrad, U.S.S.R.
Hear Res. 1988 Sep 15;35(2-3):229-35. doi: 10.1016/0378-5955(88)90120-7.
Off-responses of single neurons from the inferior colliculus (IC) as well as summed off-responses (evoked potentials) from the IC, cochlear nucleus and auditory nerve were studied while varying the end phase of tonal signals. It was found that with tonal signals higher than the characteristic frequency, off-responses at all the auditory levels studied were greatest at the end phases near 0 and 180 degrees and were of minimal value at the end phases near 90 and 270 degrees. On the contrary, with tonal signals lower than the characteristic frequency, the greatest off-responses corresponded to the end phases near 90 and 270 degrees, and responses of the lowest value were registered at the end phases near 0 and 180 degrees. The observed phenomena did not result from transient 'off'-responses of the acoustic system. It is suggested that they reflect certain cochlear processes connected with different effectiveness of oscillation phases at frequencies below and above the resonance.
在改变音调信号的终相时，研究了来自下丘（IC）的单个神经元的离反应以及来自IC、耳蜗核和听神经的总和离反应（诱发电位）。结果发现，对于高于特征频率的音调信号，在所研究的所有听觉水平上，离反应在接近0度和180度的终相时最大，而在接近90度和270度的终相时最小。相反，对于低于特征频率的音调信号，最大的离反应对应于接近90度和270度的终相，而在接近0度和180度的终相时记录到的值最低。观察到的现象并非源于声学系统的瞬态“离”反应。有人认为，它们反映了某些与共振频率以下和以上的振荡相位不同有效性相关的耳蜗过程。
