A neuronal population code for sound localization
A neuronal population code for sound localization
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DOI：
10.1038/42246
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发表时间：
1997-08-28
期刊：
影响因子：
64.8
通讯作者：
Kuwada, S
中科院分区：
文献类型：
--
作者：
Fitzpatrick, DC;Batra, R;Kuwada, S
听者定位声音的精确度远远高于单个神经元的空间敏感度(1-3)。听觉神经元的广泛空间调谐表明，必须使用基于神经元集合的响应的代码，即群体代码，来确定声音在空间中的位置。在这里，我们证明了神经元对最有效的定位提示，低频信号的耳间时间差(<；类似于2 kHz；参考文献4，5)的调谐随着信息在听觉系统中的上升而变得更加尖锐，我们还表明，这种更尖锐的调整提高了群体代码的效率，在某种意义上，达到给定的敏锐度需要更少的神经元。
The accuracy with which listeners can locate sounds is much greater than the spatial sensitivity of single neurons(1-3). The broad spatial tuning of auditory neurons indicates that a code based on the responses of ensembles of neurons, a population code, must be used to determine the position of a sound in space, Here we show that the tuning of neurons to the most potent localization cue, the interaural time difference in low-frequency signals (< similar to 2 kHz; refs 4, 5), becomes sharper as the information ascends through the auditory system, We also show that this sharper tuning increases the efficiency of the population code, in the sense that fewer neurons are required to achieve a given acuity.