We investigated the responses of single neurons in the dorsal medullar nucleus of the grass frog ( Rana temporaria L.) to tones with amplitude modulated by repetitive segments of low-frequency noise. The carrier frequency corresponded to the neuronal characteristic frequency within the range of 0.2-2.0 kHz. The responses were compared with current instantaneous values of the signal amplitude and the rate of its change. We detected neurons with responses modulated either by the current signal amplitude, or the rate of change in the amplitude, or a combination of both parameters. In the vast majority of neurons, the rate of change in the amplitude played a crucial role in spike generation. The data obtained were compared with functional features of neurons located in the mammalian cochlear nucleus.

中文翻译：

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两栖类延髓听觉神经元尖峰产生的信号幅度及其变化率的相对意义

我们研究了草蛙 (Rana temporaria L.) 背髓核中的单个神经元对由重复低频噪声片段调制的幅度的音调的反应。载波频率对应于0.2-2.0 kHz范围内的神经元特征频率。将响应与信号幅度的当前瞬时值及其变化率进行比较。我们检测到响应由电流信号幅度、幅度变化率或这两个参数的组合调制的神经元。在绝大多数神经元中，振幅的变化率在尖峰生成中起着至关重要的作用。将获得的数据与位于哺乳动物耳蜗核中的神经元的功能特征进行比较。