Temporal coding of periodicity pitch in the auditory system: an overview.
Temporal coding of periodicity pitch in the auditory system: an overview.
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DOI：
10.1155/np.1999.147
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发表时间：
1999
影响因子：
3.1
通讯作者：
Cariani P
中科院分区：
文献类型：
--
作者：
Cariani P
本文概述了神经脉冲编码的分类，并回顾了听觉神经和耳蜗核中基于峰间间期的音高和音色表征的神经生理学证据。神经脉冲码可以分为基于通道的码、时间模式码和到达时间码。听觉神经纤维放电的时间反映了声波波形的时间结构，因此产生的峰间间期精确地传达了有关刺激周期性的信息。人群范围内的尖峰间期分布是通过将来自许多单个I型听觉神经纤维的观察到的反应的间期相加而构建的。这种分布中的特征与人类听众听到的音高密切对应。听觉神经阵列中最常见的全阶间隔几乎总是对应于音高频率，而音高相关间隔的相对分数在所有其他间隔中定性地对应于音高的强度。因此，音高感知的许多不同方面都可以用这种时间表征来解释。在耳蜗核的主要神经元群体中观察到类似的刺激驱动的时间放电模式。人口间隔分布构成了一个替代的时域策略，代表感官信息，补充空间组织的感官地图。类似的自相关表示在其他感觉系统中也是可能的，其中神经放电被时间锁定到刺激波形。
This paper outlines a taxonomy of neural pulse codes and reviews neurophysiological evidence for interspike interval-based representations for pitch and timbre in the auditory nerve and cochlear nucleus. Neural pulse codes can be divided into channel-based codes, temporal-pattern codes, and time-of-arrival codes. Timings of discharges in auditory nerve fibers reflect the time structure of acoustic waveforms, such that the interspike intervals that are produced precisely convey information concerning stimulus periodicities. Population-wide inter-spike interval distributions are constructed by summing together intervals from the observed responses of many single Type I auditory nerve fibers. Features in such distributions correspond closely with pitches that are heard by human listeners. The most common all-order interval present in the auditory nerve array almost invariably corresponds to the pitch frequency, whereas the relative fraction of pitchrelated intervals amongst all others qualitatively corresponds to the strength of the pitch. Consequently, many diverse aspects of pitch perception are explained in terms of such temporal representations. Similar stimulus-driven temporal discharge patterns are observed in major neuronal populations of the cochlear nucleus. Population-interval distributions constitute an alternative time-domain strategy for representing sensory information that complements spatially organized sensory maps. Similar autocorrelation-like representations are possible in other sensory systems, in which neural discharges are time-locked to stimulus waveforms.