Coding of amplitude and frequency modulated sounds in the cochlear nucleus of the rat.
Coding of amplitude and frequency modulated sounds in the cochlear nucleus of the rat.
复制标题
大鼠耳蜗核中幅度和频率调制声音的编码。
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
Aage R. Møller
中科院分区：
文献类型：
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作者：
Aage R. Møller
研究了大鼠耳蜗核单个单位对正弦调幅和调频音调以及调幅宽带噪声的反应。从锁定到调制波的周期直方图确定调制周期内的放电分布。在响应调幅音调和宽带噪声，所有的单位调查表明，在调制频率范围从50到200赫兹内的尖峰频率的调制程度的峰值。在许多单位之间的关系的调制程度的刺激声音和调制的尖峰列车的结果是几乎不变的声音强度在很宽的范围。在其他单位中，当声音强度增加时，在一定范围内的调制频率的调制增强变得更加明显。这主要是由于较低调制频率下的调制受到抑制。的直方图的形状几乎是正弦曲线，即使在调制深度，导致近100%调制的神经放电频率。放电频率响应调频音的调制量取决于与单位CF相关的音调频率。
The responses of single units in the cochlear nucleus of the rat to sinusoidally amplitude- and frequency-modulated tones and amplitude-modulated broadband noise were studied. The distribution of discharges within a cycle of modulation was determined from cycle histograms locked to the modulation wave. In response to amplitude-modulated tones and broadband noise, all units investigated showed a peak in the degree of modulation of the spike frequency within the modulation frequency range from 50 to 200 Hz. In many units the relationship between the degree of modulation of the stimulus sound and of the modulation of the resulting spike train was almost unchanged over a wide range of sound intensities. In other units, enhancement of modulation within a certain range of modulation frequency became more pronounced when the sound intensity was increased. This was mainly due to a suppression of modulation at lower modulation frequencies. The shape of the histograms was nearly sinusoidal even at modulation depths which resulted in nearly 100% modulation of the neural discharge frequency. The amount of modulation of the discharge frequency in response to frequency-modulated tones was dependent on the frequency of the tone in relation to the CF of the unit.