Pulse-number distribution for the neural spike train in the cat's auditory nerve.
Pulse-number distribution for the neural spike train in the cat's auditory nerve.
复制标题
猫听觉神经中神经尖峰序列的脉冲数分布。
DOI：
10.1121/1.2021156
复制
发表时间：
1983
期刊：
影响因子：
--
通讯作者：
S. Khanna
中科院分区：
文献类型：
--
作者：
M. Teich;S. Khanna
使用标准的细胞外微电极记录技术，记录了猫听神经初级传入纤维的脉冲数分布（pnd）。采用纯音和宽带噪声刺激。在一组连续的间隔中测量神经尖峰（脉冲）n的数量，每个间隔持续时间为T秒。量n在不同的区间变化。然后使用这些数据来确定PND，即在时间T中出现n个峰值的概率p（n，T）与数量n的比值。得到p（n，T）的估计均值和方差。使用了两个不同的T值。一个意想不到的观察结果是，计数均值方差比R是相对恒定的，与刺激强度无关。使用PND作为潜在神经点过程的统计度量有许多优点。例如，PND很容易证明某些单位存在尖峰簇（例如，对）。PND基本上不受时间抖动和时间量化的影响，并为以低速率发射的单元提供了统计上显著的测量。对自发放电条件下的有比例和无比例脉冲间隔分布（pid）的研究表明，神经事件的发生通常不能用更新过程来描述。我们的研究表明，通常用于模拟听觉神经尖峰序列的点过程与所有数据都不一致。外周听觉系统中，声音信息编码到神经尖刺的过程似乎采用了类似于内曼-斯科特型的聚类点过程的形式。对于纯音激励，在这种情况下，PND将很好地表示为多项式分布。
Pulse-number distributions (PNDs) were recorded from primary afferent fibers in the auditory nerve of the cat, using standard extracellular microelectrode recording techniques. Pure-tone and broadband-noise stimuli were used. The number of neural spikes (pulses) n was measured in a set of contiguous intervals, each of duration T seconds. The quantity n varies from one interval to another. These data were then used to determine the PND, which is the probability p(n,T) of occurrence of n spikes in the time T, versus the number n. The estimated mean and variance of p(n,T) were obtained. Two different values of T were used. An unexpected observation was that the count mean-to-variance ratio R is relatively constant and independent of the stimulus intensity. Use of the PND as a statistical measure of the underlying neural point process has a number of virtues. For example, the PND readily exhibits the existence of spike clusters (e.g., pairs) for some units. The PND is essentially unaffected by time jitter and time quantization and provides a statistically significant measure for units firing at low rates. A study of the scaled and unscaled pulse-interval distributions (PIDs), under conditions of spontaneous firing, demonstrates that the occurrences of neural events are generally not describable by a renewal process. Our investigation shows that none of the point processes customarily used to model the auditory neural spike train is consistent with all of the data. It appears that the encoding of acoustic information into nerve spikes in the peripheral auditory system takes the form of a cluster point process similar to the Neyman-Scott type. For pure-tone excitation, the PND will be well represented as a multinomial distribution in this case.
龙猫听觉神经对低频音调的反应。
DOI：
10.1121/1.389577
发表时间：
1983
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Ruggero,MA;Rich,NC
通讯作者：
Rich,NC