Coding Efficiency of Fly Motion Processing Is Set by Firing Rate, Not Firing Precision
Coding Efficiency of Fly Motion Processing Is Set by Firing Rate, Not Firing Precision
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DOI：
10.1371/journal.pcbi.1000860
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发表时间：
2010-07-01
影响因子：
4.3
通讯作者：
Borst, Alexander
中科院分区：
文献类型：
--
作者：
Spavieri, Deusdedit Lineu, Jr.;Eichner, Hubert;Borst, Alexander
为了理解感觉信息处理的基本原理，了解神经系统如何处理各种干扰来源是很重要的。在这里，我们分析苍蝇神经系统中运动信息的表示如何随着温度和亮度的变化而变化。虽然这两个环境变量对果蝇的神经系统有相当大的影响，但它们并不妨碍果蝇在广泛的条件下做出适当的行为。我们记录了运动敏感神经元H1细胞在多种不同温度和亮度组合下对时变刺激的反应。我们发现，平均发射速率，而不是发射精度，随温度变化，而两者都受平均亮度的影响。由于我们还发现信息率和编码效率主要由平均射速决定，我们的结果表明，面对环境扰动，编码效率是通过增加平均射速而不是通过提高射击精度来提高的。
To comprehend the principles underlying sensory information processing, it is important to understand how the nervous system deals with various sources of perturbation. Here, we analyze how the representation of motion information in the fly's nervous system changes with temperature and luminance. Although these two environmental variables have a considerable impact on the fly's nervous system, they do not impede the fly to behave suitably over a wide range of conditions. We recorded responses from a motion-sensitive neuron, the H1-cell, to a time-varying stimulus at many different combinations of temperature and luminance. We found that the mean firing rate, but not firing precision, changes with temperature, while both were affected by mean luminance. Because we also found that information rate and coding efficiency are mainly set by the mean firing rate, our results suggest that, in the face of environmental perturbations, the coding efficiency is improved by an increase in the mean firing rate, rather than by an increased firing precision.