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arXiv 1402.0863q-bio.NC
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欧几里德度量的比较及其在脉冲序列空间统计推断中的应用

A comparison of Euclidean metrics and their application in statistical inferences in the spike train space

Sergiusz Wesolowski, Alexandre A. Nikonov, Robert J. Contreras, Wei Wu

摘要:

对锋电位序列的统计分析和推断是神经编码研究的中心课题之一。了解给定脉冲序列数据的潜在分布和几何结构是非常有趣的。然而,一个根本的障碍是,所有的脉冲序列的空间是不是一个欧几里德空间,和非欧几里德度量已在文献中常用的特征的变化和模式的神经观察。在过去的几年里,两个类似于欧几里德的度量被独立地开发出来,用于测量脉冲序列空间中的距离。这些度量的重要益处在于,由于它们的欧几里德性质,脉冲序列空间将适合于嵌入欧几里德空间中。在本文中,我们系统地比较这两个度量的理论,性质和应用。由于其欧几里德属性,这些度量之一已被进一步用于定义汇总统计(即均值和方差)并在脉冲序列空间中进行统计推断。在这里,我们提供了等效的定义,使用其他指标,并表明可以进行一致的统计推断。然后,我们应用这两个推理框架中的神经编码问题的记录在膝状体神经节刺激不同的口味。结果发现,这两个框架取得了理想的结果,并提供了有用的新工具,在神经脉冲序列空间的统计推断。

英文摘要:

Statistical analysis and inferences on spike trains are one of the central topics in neural coding. It is of great interest to understand the underlying distribution and geometric structure of given spike train data. However, a fundamental obstacle is that the space of all spike trains is not an Euclidean space, and non-Euclidean metrics have been commonly used in the literature to characterize the variability and pattern in neural observations. Over the past few years, two Euclidean-like metrics were independently developed to measure distance in the spike train space. An important benefit of these metrics is that the spike train space will be suitable for embedding in Euclidean spaces due to their Euclidean properties. In this paper, we systematically compare these two metrics on theory, properties, and applications. Because of its Euclidean properties, one of these metrics has been further used in defining summary statistics (i.e. mean and variance) and conducting statistical inferences in the spike train space. Here we provide equivalent definitions using the other metric and show that consistent statistical inferences can be conducted. We then apply both inference frameworks in a neural coding problem for a recording in geniculate ganglion stimulated by different tastes. It is found that both frameworks achieve desirable results and provide useful new tools in statistical inferences in neural spike train space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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