Rate Coding Versus Temporal Order Coding: What the Retinal Ganglion Cells Tell the Visual Cortex
Rate Coding Versus Temporal Order Coding: What the Retinal Ganglion Cells Tell the Visual Cortex
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DOI：
10.1162/08997660152002852
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发表时间：
2001-06
影响因子：
2.9
通讯作者：
R. V. Rullen;S. Thorpe
中科院分区：
文献类型：
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作者：
R. V. Rullen;S. Thorpe
人们通常认为，视网膜神经节细胞发送到视皮质的信息是由在泊松过程产生的尖峰序列上观察到的平均放电率编码的。使用信息传输的方法，我们评估两个这样的代码的性能，一个是基于尖峰计数和其他的平均interspike间隔，并比较结果与秩序码，其中第一节细胞发出的尖峰给出了最大的权重。我们的研究结果表明，速率码是远离最佳的快速信息传输和穗列车的时间结构可以有效地使用，以最大限度地提高信息传输速率的条件下，每个细胞只需要发射一个尖峰。
It is often supposed that the messages sent to the visual cortex by the retinal ganglion cells are encoded by the mean firing rates observed on spike trains generated with a Poisson process. Using an information transmission approach, we evaluate the performances of two such codes, one based on the spike count and the other on the mean interspike interval, and compare the results with a rank order code, where the first ganglion cells to emit a spike are given a maximal weight. Our results show that the rate codes are far from optimal for fast information transmission and that the temporal structure of the spike train can be efficiently used to maximize the information transfer rate under conditions where each cell needs to fire only one spike.